CN109479776B

CN109479776B - Industrial procambarus clarkii breeding method

Info

Publication number: CN109479776B
Application number: CN201811463419.5A
Authority: CN
Inventors: 汪翔; 宋光同; 何吉祥; 崔凯; 张静; 陈静; 吴本丽; 黄龙; 张烨; 佘磊
Original assignee: Fisheries Research Institute of Anhui AAS
Current assignee: Fisheries Research Institute of Anhui AAS
Priority date: 2018-12-03
Filing date: 2018-12-03
Publication date: 2021-10-12
Anticipated expiration: 2038-12-03
Also published as: CN109479776A

Abstract

The invention discloses an industrial procambarus clarkii breeding method which is applied to a breeding system, wherein the breeding system comprises a breeding area. A plurality of isolation nets are arranged in the breeding area, and the isolation nets divide the breeding area into a plurality of breeding spaces. The breeding method comprises the following steps: putting the procambarus clarkii parents into a breeding space according to the proportion of 1:1 of male parents and female parents; controlling the temperature of the copulated egg-holding shrimps for breeding in a breeding space; hatching shrimp eggs: separating shrimp larvae from female shrimps and incubating at controlled temperature to form juvenile shrimps; secondly, after the shrimp eggs grow to be orange, washing the shrimp eggs to promote the shrimp eggs to be separated from the parent bodies of the shrimp eggs, and putting the separated shrimp eggs into an incubation barrel at the temperature of 9-12 ℃ for storage; after the shrimp seeds are taken out of the film, taking out the isolation net and the seed shrimps; culturing the juvenile shrimps to the procambarus clarkii with the juvenile shrimps growing to be 3-4cm long. The invention can control the breeding speed of the procambarus clarkii, thereby ensuring the synchronism of the shrimp seeds and avoiding individual difference caused by different growth speeds of the same batch of shrimp seeds.

Description

Industrial procambarus clarkii breeding method

Technical Field

The invention relates to a breeding method in the technical field of breeding, in particular to an industrial procambarus clarkia breeding method.

Background

The procambarus clarkii is commonly called crayfish, belongs to the freshwater economic shrimp, and is popular with people because of delicious meat taste. The procambarus clarkii has short culture period and high benefit and is accepted by vast farmers. However, the current breeding mode of the procambarus clarkii fry is a mode of breeding the procambarus clarkii fry in a pond by self under natural conditions after putting the seed shrimps in the pond. Because the synchronization of character development and the synchronization of mating time of the fed procambarus clarkii cannot be controlled, the specifications of the procambarus clarkii fry are uneven when the shrimp seedlings emerge, and the individual difference is large. Meanwhile, the shrimp fries bred under natural conditions can provide fries to the market generally in 3-4 months. This also causes the common phenomenon that the seedling supply period is short and the time for the seedlings to appear on the market is slow.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides an industrial procambarus clarkia breeding method, which solves the problems of uneven specifications and large individual difference of the existing procambarus clarkia seedlings when the seedlings emerge.

The invention is realized by adopting the following technical scheme: an industrial procambarus clarkii breeding method is applied to a culture system; the cultivation system is provided with a cultivation area, a plurality of isolation nets which are parallel and arranged at equal intervals are arranged in the cultivation area, and the cultivation area is divided into a plurality of breeding spaces by the isolation nets;

the breeding method comprises the following steps:

step one, putting procambarus clarkii parents into a breeding space according to the ratio of 1:1 of male to female at the density of 20-30 procambarus clarkii parents per cubic water body;

step two, culturing at least one female shrimp spawned after mating in a breeding space under the temperature control;

step three, hatching shrimp eggs: separating shrimp larvae from female shrimps and incubating at controlled temperature to form juvenile shrimps; secondly, after the shrimp eggs grow to be orange, washing the shrimp eggs by using water with the flow rate of 2-5cm/s to promote the shrimp eggs to be separated from the parent bodies, and putting the separated shrimp eggs into an incubation barrel at the temperature of 9-12 ℃ for storage; wherein, in the second mode, the shrimp eggs which have been hatched to the flea larval stage are put into a low-temperature hatching barrel for aeration preservation;

taking out the isolation net and the seed shrimps after the shrimp seedlings are out of the film, and hanging a plurality of cross-shaped plastic brushes in the culture area;

step five, breeding the juvenile shrimps until the juvenile shrimps grow to be procambarus clarkii with the length of 3-4 cm;

wherein at least one porous shrimp nest is placed in the breeding area for breeding the procambarus clarkii;

the porous shrimp nest comprises:

a culture container;

at least one positioning shaft disposed in the cultivation container;

at least one positioning plate corresponding to at least one positioning shaft, wherein each positioning shaft is vertically arranged on the corresponding positioning plate, and the positioning plates are placed in the culture container; and

each breeding mechanism comprises a breeding box, a fixed shaft and a plurality of breeding plates; the fixed shaft is arranged in the breeding box, and the bottom end of the fixed shaft is vertically fixed on the bottom wall of the breeding box; the fixed shaft is provided with a hollow structure; the plurality of culture plates are arranged on the fixed shaft and divide the inner cavity of the culture box into a plurality of culture spaces, and each culture space is used for culturing at least one cultured shrimp; a plurality of culture holes for the in-and-out of the culture water body are formed in the culture box and the culture plate; the plurality of breeding mechanisms are arranged in the breeding container in a stacked mode, and the breeding boxes are installed on the positioning shafts through the matching of the hollow structures of the corresponding fixing shafts and one of the positioning shafts.

As a further improvement of the scheme, in the third step, the method for separating the shrimp seeds from the female shrimps and incubating the shrimp seeds into the juvenile shrimps under the controlled temperature comprises the following steps:

and stimulating the separation of the shrimp larvae and the parent by continuously increasing the temperature of the culture water body in the culture area.

As a further improvement of the scheme, the suspended cross-shaped plastic brush is spaced from the bottom of the culture area by 2-5 cm.

As a further improvement of the above scheme, in the second step, the temperature-controlled cultivation method comprises:

correspondingly reducing the temperature of the aquaculture water body in the aquaculture area through the increase of the development degree of the shrimp eggs; and when the shrimp eggs grow to the eyepoint, keeping the temperature of the aquaculture water body at 16-18 ℃.

Further, after the female shrimps take eggs, when the shrimp eggs grow to the flea larval stage, the water temperature of the aquaculture water body is reduced by 1-2 degrees every day, and finally the water temperature is between 16-18 degrees; when 80-90% of shrimp eggs develop to orange and eyespots can be observed, the water temperature is increased to 24 ℃ for 3 consecutive days to stimulate the shrimp larvae to synchronously separate from the parent.

As a further improvement of the above scheme, the culture system further comprises a sewage collecting area and a mixing area;

the culture area the dirty district of collection the mixed zone is for separating three region in a culture pond, just rivers in the culture area pass through dirty district one-way circulation of collection extremely the mixed zone, the mixed zone is carried its liquid that has mixed fodder, biological carbon source and microbial inoculum to through at least one suction pump to the culture zone to form the farming systems of water one-way circulation.

Further, the mixing zone is also provided with an aerator pipe, the feed is powdery feed, the biological carbon source is a water-soluble carbon source, and the microbial preparation is powdery engineering bacteria or a microbial culture solution; the aeration pipe 21 is used for increasing oxygen to the mixing zone, and the air discharged from the aeration pipe in the mixing zone drives the water inside the mixing zone to stir, so as to mix the feed, the biological carbon source and the microbial preparation into the liquid in the mixing zone.

Furthermore, a baffle is arranged in the culture pond, and the baffle is arranged along the length direction of the culture pond and divides the culture pond into two independent accommodating grooves; in two holding grooves, the holding groove with smaller volume is the mixing area, the holding groove with larger volume is separated into the breeding area and the sewage collecting area through a one-way overflow structure.

Furthermore, a plurality of oxygenation pipes are arranged at the bottom of the culture area, and at least one water inlet pipe is arranged at the water inlet end of the culture area; a plurality of oxygenation pipes are arranged in parallel and at equal intervals;

an air blower is arranged on the outer side of the culture pond and used for conveying air to the oxygenation pipe and the aeration pipe;

the cultivation area is further provided with an air pushing pipe, the same end of each oxygenation pipe is communicated with the air pushing pipe, and an air outlet of the air blower 15 is communicated with an air inlet of the air pushing pipe.

Furthermore, the sewage collecting area is separated from the water discharging end of the culture area by a one-way overflow structure; the liquid in the culture area flows to the sewage collecting area in a unidirectional way through a unidirectional overflow structure; the upper part of the sewage collecting area is provided with an overflow port through which the liquid in the sewage collecting area flows to the mixing area;

the unidirectional overflow structure comprises at least one layer of overflow grid and at least one partition plate separated from the overflow grid; the overflow grid and the partition plate are both vertical to the bottom wall of the culture pond; the overflow grid and the bottom wall of the culture pond are provided with a distance; the bottom mounting of baffle is on the diapire of breeding the pond, and the height that highly is less than breeding the pond of baffle, and the height that highly is less than the baffle of overflow mouth.

The industrial procambarus clarkii breeding method enables procambarus clarkii parents to mate in the breeding space and breed at a controlled temperature in the breeding space, can control the breeding speed of the procambarus clarkii, and simultaneously can stimulate the shrimp seeds of the procambarus clarkii to be synchronously separated from the parent in a large batch, thereby ensuring the synchronism of the shrimp seeds and avoiding individual difference caused by different growth speeds of the same batch of shrimp seeds. Moreover, the seedlings can be selectively emerged in a temperature control mode, so that the synchronous emergence of the shrimp seedlings is realized, the specifications of the shrimp seedlings are neat, and the requirement of factory anti-season seedling supply is met.

Drawings

FIG. 1 is a schematic structural diagram of a culture area of a culture system to which the industrial Procambrus clarkii breeding method of embodiment 1 of the invention is applied;

FIG. 2 is a schematic structural diagram of a culture system applied to the industrial Procambrus clarkii breeding method in embodiment 2 of the invention;

FIG. 3 is a schematic structural diagram of a separation apparatus used in an industrial Procambrus clarkii breeding method according to embodiment 2 of the present invention;

FIG. 4 is a schematic structural view of a biological floc separating apparatus according to example 3 of the present invention;

FIG. 5 is a schematic structural diagram of a porous shrimp nest used in the industrial Procambrus clarkii breeding method in example 4 of the present invention;

FIG. 6 is a schematic view of the installation of the cultivation container and the positioning shaft of the multi-hole shrimp nest in FIG. 5;

FIG. 7 is a schematic structural view of a cultivation mechanism of the multi-hole shrimp nest in FIG. 5;

FIG. 8 is a schematic view of the structure of the cultivation plate of the cultivation mechanism in FIG. 7;

FIG. 9 is a schematic structural view of a multi-hole shrimp nest in accordance with example 4 of the present invention when it is installed;

FIG. 10 is a schematic structural view of a porous shrimp nest according to example 5 of the present invention;

FIG. 11 is a schematic structural view of a breeding mechanism of a multi-hole shrimp nest according to example 6 of the present invention;

FIG. 12 is a schematic view of the cultivation mechanism of FIG. 11 after the cover plate is covered;

FIG. 13 is a schematic view of the structure of the farm plate of the farm of FIG. 11;

FIG. 14 is a schematic structural view of a bottom plate of the breeding mechanism in FIG. 11;

FIG. 15 is a schematic view of the structure of the cultivation box of the cultivation mechanism in FIG. 11;

FIG. 16 is a schematic structural view of a fixing shaft, a bottom plate and a cultivation plate of another cultivation mechanism for a multi-hole shrimp nest according to embodiment 6 of the present invention;

FIG. 17 is a schematic structural view of a fixing shaft, a bottom plate and a cultivation plate of another cultivation mechanism of a porous shrimp nest in embodiment 6 of the invention;

FIG. 18 is a schematic structural view of a fixing shaft, a bottom plate and a cultivation plate of the cultivation mechanism of the multi-hole shrimp nest in embodiment 7 of the present invention;

fig. 19 is a schematic structural view of a cultivation box of the cultivation mechanism of the porous shrimp nest in fig. 18.

Description of the symbols:

1 culture container 19 overflow grid

2 positioning shaft 20 baffle

3 culture mechanism 21 aeration pipe

4 culture box 22 pins

5 fixed shaft 23 cover plate

6 culture plate 24 bottom plate

7 air-lift water pump of culture hole 26

8 positioning plate 27 first delivery pipe

9 mounting hole 28 sedimentation separator

10 culture pond 29 sealing cover

11 oxygen supply pipe 30 second material conveying pipe

12 inlet pipe 31 return pipe

13 overflow 32 solid collector

14 suction pump 33 electronic valve

15 blower 34 screen

16 air pushing pipe 35 water permeable hole

17 three-way valve 36 isolation net

18 feeding pipe 37 breeding space

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

Referring to fig. 1, the embodiment provides an industrial procambarus clarkia breeding method, which is applied to a culture system. The culture system comprises a culture area, a sewage collecting area and a mixing area, wherein the mixing area is used for conveying liquid mixed with biological floccules to one end of the culture area, and the sewage collecting area is used for collecting sewage discharged by the culture area and purifying and conveying the sewage to the mixing area. The culture area, the sewage collecting area and the mixing area are three areas separated in a culture pond 10. A plurality of separation nets 36 which are arranged in parallel and at equal intervals are arranged in the culture area, and the separation nets 36 divide the culture area into a plurality of breeding spaces 37.

The industrial procambarus clarkii breeding method of the embodiment comprises the following steps:

step one, putting procambarus clarkii parents into a breeding space 37 according to the male-female ratio of 1:1 and the density of 20-30 procambarus clarkii parents per cubic water body;

step two, culturing at least one female shrimp spawned after mating in the breeding space 37 under the temperature control;

step three, hatching shrimp eggs:

separating shrimp larvae from female shrimps and incubating at controlled temperature to form juvenile shrimps;

secondly, after the shrimp eggs grow to be orange, washing the shrimp eggs by using water at the flow rate of 2-5cm/s (generated by a water gun), promoting the shrimp eggs to be separated from the parent bodies, and putting the separated shrimp eggs into an incubation barrel at the temperature of 9-12 ℃ for storage; wherein, the second mode is that the shrimp eggs which have been hatched to the flea larval stage are put into a low-temperature hatching barrel for aeration preservation; therefore, the accumulated speed of the environmental accumulated temperature can be continuously reduced, the period of hatching the shrimp eggs is prolonged, the time for the shrimp larvae to come out of the membrane is set later, and the purpose of prolonging the period of the shrimp larvae supply is achieved;

step four, after the shrimp seeds are taken out of the film, the isolation net 36 and the seed shrimps are taken out, and a plurality of cross-shaped plastic brushes are hung in the culture area; the suspended cross-shaped plastic brush can have a 2-5cm interval with the bottom of the culture area;

and fifthly, breeding the juvenile shrimps until the juvenile shrimps grow to be the procambarus clarkii with the length of 3-4 cm.

In some embodiments, in step three, the method of separating shrimp larvae from female shrimp and incubating into shrimp larvae at a controlled temperature comprises: the temperature of the culture water body in the culture area is continuously increased, and the separation of the shrimp larvae and the parent is stimulated. After the female shrimps take eggs, when the shrimp eggs grow to the flea larval stage, the water temperature of the culture water body is reduced by at least 1-2 ℃ every day, and finally the water temperature is between 16-18 ℃; when 80-90% of shrimp eggs develop to orange and eyespots can be observed, the water temperature is increased to 24 ℃ for 3 consecutive days to stimulate the shrimp larvae to synchronously separate from the parent.

In the second step, the temperature-controlled cultivation method comprises the following steps: (1) the temperature of the culture water body in the culture area is correspondingly reduced through the increase of the development degree of the shrimp eggs of the female shrimps; (2) when the shrimp eggs grow to the eyepoint, the temperature of the aquaculture water body is kept at 16-18 ℃.

The environment accumulated temperature required by the incubation of the procambarus clarkii is 450-; the incubation is completed in 90-100 days when the average water temperature is 5 ℃. At low water temperatures, however, hatchability and survival rates are greatly reduced. In the breeding method of the embodiment, the shrimp eggs are firstly incubated under the natural temperature condition, and when part of the shrimp eggs grow to reach the flea larval stage, the temperature is gradually controlled to 16-18 ℃, and the incubation speed is reduced. When all the cultured shrimp eggs reach the flea larva stage, gradually controlling the temperature to 24 ℃ to promote the shrimp larvae to synchronously emerge from the film. Therefore, on the basis of keeping a certain amount of hatchability and survival rate, the problems of uneven specifications and large individual difference of the existing procambarus clarkii fry during the fry emergence are solved. Meanwhile, the procambarus clarkii fries bred through industrial temperature control can provide fries to the market from 12 months in the first year to 4 months in the second year, so that the fry supply period and the time for new fries to appear on the market are greatly improved.

In summary, according to the industrial procambarus clarkia breeding method of the embodiment, the procambarus clarkia parents are mated in the breeding space and cultured in the breeding space at a controlled temperature, so that the breeding speed of the procambarus clarkia can be controlled, and meanwhile, the shrimp seeds of the procambarus clarkia can be stimulated in a large scale to be synchronously separated from the parent, so that the synchronism of the shrimp seeds is ensured, and the individual difference caused by the different growth speeds of the same shrimp seeds is avoided. Moreover, the seedlings can be selectively emerged in a temperature control mode, so that the synchronous emergence of the shrimp seedlings is realized, the specifications of the shrimp seedlings are neat, and the requirement of factory anti-season seedling supply is met.

Example 2

Referring to fig. 2, the cultivation system used in the industrial procambarus clarkia breeding method of the present embodiment is similar to the cultivation system of the embodiment 1, and the differences are as follows:

a baffle is arranged in the culture pond 10 and arranged along the length direction of the culture pond 10, and the culture pond 10 is divided into two independent accommodating grooves. In the two holding grooves, the holding groove with smaller volume is a mixing area, and the holding groove with larger volume is separated into a culture area and a sewage collecting area through a one-way overflow structure.

The bottom of the culture area is provided with a plurality of oxygenation pipes 11, and the water inlet end of the culture area is provided with at least one water inlet pipe 12. Specifically, the number of the oxygen increasing tubes 11 may be three, and the three oxygen increasing tubes 11 are arranged in parallel and at equal intervals. The number of the water inlet pipes 12 is two, and the two water inlet pipes 12 are arranged in parallel and are respectively fixed on the inner wall of the culture area. The water inlet pipe 12 is provided with a plurality of water equalizing holes which are evenly distributed on the outer wall facing the culture area, and the water equalizing holes enable the culture water in the water inlet pipe 12 to evenly enter the culture area. Of the two inlet pipes 12, the upper inlet pipe 12 is used to discharge feed to the culture area, and the lower inlet pipe 12 is used to supply water to the culture area. The water inlet pipe 12 can provide aquaculture water for the aquaculture area, so that water flow is generated in the aquaculture area, running water is generated in the aquaculture area, and the survival conditions of aquatic products are improved.

In a specific implementation process, the length, the width and the height of the culture area are preferably 4m and 1.5m respectively. Meanwhile, the porous shrimp nests can be correspondingly arranged according to the size of the culture area so as to ensure the full utilization of the space of the culture area.

The other end of the sewage collecting area is separated from the other end of the culture area through a one-way overflow structure, and liquid in the culture area flows to the sewage collecting area in a one-way mode through the one-way overflow structure. The unidirectional overflow structure comprises at least one layer of overflow grid 19 and at least one partition plate 20 which is separated from the overflow grid 19. The ends of the overflow gate 19 and the partition plate 20 are perpendicular to the bottom wall of the culture pond 10. The overflow grate 19 is provided with a biological filter material, and a distance is reserved between the overflow grate 19 and the bottom wall of the culture pond 10. The bottom end of the partition board 20 is fixed on the bottom wall of the culture pond 10, and the height of the partition board 20 is lower than that of the culture pond 10. Wherein, the size of the space can be 5-10cm, and the height of the partition board 20 can be 5-10cm lower than the height of the culture pond 10.

The overflow grid 19 is not connected to the bottom wall of the culture pond 10, so that the culture wastewater cannot block the overflow grid 19 when being excessive. The bottom end of the partition board 20 is fixed on the bottom wall of the culture pond 10, and the height of the partition board 20 is lower than that of the culture pond 10, so that the culture wastewater turns over from the partition board 20 to the sewage collecting area. The liquid in the culture area can flow to the sewage collecting area in a one-way mode, purification of water is facilitated, and the overflow grid 19 can be provided with a biological filter material, so that water quality can be further purified. In this embodiment, can set up water purification mechanism in the dirty district of collection to purify the breed waste water that gets into.

The mixing area is used for feeding feed to the culture area and putting a biological carbon source and a microbial agent. The upper part of the sewage collecting area is provided with an overflow port 13 for the liquid in the sewage collecting area to flow to the mixing area, and the height of the overflow port 13 is lower than the height of the liquid in the one-way overflow structure, namely the height of the overflow port 13 is lower than the height of the partition plate 20. The mixing zone is provided with at least one suction pump 14 corresponding to the at least one inlet pipe 12. The suction pump 14 draws liquid from the mixing zone and delivers the liquid to the growing zone through the corresponding intake pipe 12. The mixing area can also be provided with an aeration pipe 21, the feed is powdery feed, the biological carbon source is a water-soluble carbon source, and the microbial preparation is powdery engineering bacteria or a microbial culture solution. The aeration pipe 21 is used for increasing oxygen to the mixing area, and the air discharged by the aeration pipe 21 in the mixing area drives the water body in the mixing area to stir, so that the feed, the biological carbon source and the microbial preparation are mixed into the liquid in the mixing area.

In this embodiment, the cultivation area may further include an air pushing pipe 16, the same end of the plurality of oxygenation pipes 11 is communicated with the air pushing pipe 16, and the air outlet of the blower 15 is communicated with one end of the air pushing pipe 16. At least one blower 15 may also be installed on the outside of the culture pond 10, and the blower 15 is used to supply air to the oxygenation pipe 11 and the aeration pipe 21. The air blower 15 blows air into the air push pipe 16 and transfers the air into the feeding pipe 11, so that the oxygen increasing pipe 11 provides enough oxygen for the porous shrimp nests, aquatic products are prevented from dying due to oxygen deficiency, and meanwhile, water in the culture area is purified.

In some embodiments including this embodiment, the cultivation area may further be provided with a three-way valve 17, and two output ends of the three-way valve 17 are respectively connected to the inlets of the two water inlet pipes 12, and an input end of the three-way valve 17 is communicated with the water pump 14 through a feed pipe 18. When the mixed area is used for feeding the feed, the culture area is switched to flow from the water inlet pipe 12 positioned above to enter the culture area through the three-way valve 17, and after the feeding activity is finished for 10-30 minutes, the flow is switched to flow from the water inlet pipe 12 positioned below to enter the culture area through the three-way valve 17. When water needs to be supplied to the culture area, the water inlet pipe 12 for releasing the shrimp feed can be closed through the three-way valve 17, and the water inlet pipe 12 below is opened at the same time, and conversely, when the shrimp feed is released to the culture area, the water inlet pipe 12 below is closed and the water inlet pipe 12 above is opened. In some embodiments, the two water inlet pipes 12 can be opened simultaneously, and at this time, the three-way valve 17 is not provided, so that the water inlet pipe 12 below supplies water, and the water inlet pipe 12 above releases the shrimp feed, and the shrimp feed falls in a parabolic track in the culture area, so that the shrimp feed is fully mixed in the culture area, and feeding is realized.

Furthermore, the culture area is also provided with a temperature control device. The temperature control device comprises a heater, a controller and a plurality of temperature measuring structures. The temperature measurement structure is used for detecting the temperature of the water body in the culture area. The controller drives the heater to heat the liquid in the culture area when the temperature of the water body is lower than a preset temperature, and controls the heater to stop heating until the temperature of the water body reaches the preset temperature. So, when the temperature in breed district is low excessively, can heat breed the district, make aquatic products be in under the temperature that suits to grow, and then improve the growth rate of aquatic products to improve the output of aquatic products.

The culture system of the present embodiment divides the culture pond 10 into 3 large functional areas (culture area, dirt collecting area, mixing area), and connects the 3 functional areas in series by unidirectional closed circulation of water flow. The reason is that the height of the wall surface of the culture pond 10 is larger than that of the partition plate 20 and larger than that of the overflow port 13, so that pressure difference is formed among the culture area, the sewage collecting area and the mixing area, namely the water body in the culture area is deepest, the sewage collecting area is second, and the water body in the mixing area is lowest. Therefore, the water body can only flow into the sewage collecting area from the culture area and then enters the mixing area, and the water body is pumped into the culture area by the water pump in the mixing area, so that a one-way closed circulation flow field is achieved. Therefore, the system adds a transverse flow field on the upper and lower disturbance mode of the traditional biological floc technology, thereby causing the deposition position of the large-particle biological floc to shift towards the direction of the sewage collecting area. The overflow grid 19 forces the pressure difference outlet of the culture area and the sewage collecting area to be close to the bottom of the pool, which is more beneficial to the movement of large-particle biological floccules to the sewage collecting area. No aeration pipe in the sewage collecting area forms up-and-down disturbance, so under the action of water pressure, large particle biological flocs can be settled, and only small particle biological flocs can enter the mixing area from an overflow port 13 at the upper part of the sewage collecting area and return to the culture area. The ammonia nitrogen released by the biological flocs deposited in the sewage collecting area under the anaerobic reaction enters the mixing area to provide energy for the new biological flocs, and the reaction equation is as follows:

NH₄ ⁺+1.18C₆H₁₂O₆+HCO₃ ^-+2.06O₂→C₅H₇O₂N+6.06H₂O+3.07CO₂

therefore, the self-purification recirculating aquaculture system based on biological flocculation technology of this embodiment, through setting up mixed area, breed district and collection dirty district, the liquid that has fodder, biological carbon source, microorganism gets into the breed district from mixed area, makes the fodder raise the breed shrimp in the breed district to sewage in the breed district gets into collection dirty district from one-way overflow structure, and reentrant mixed area, with formation one-way water circulating system, make full use of water resource avoids the waste of water resource. In addition, in the invention, the liquid flows in a single direction, the water inlet pipe can play a role in flow generation to avoid dead water formation, and meanwhile, the oxygen increasing pipe is arranged in the culture area to increase oxygen to the culture area, improve the oxygen content of the liquid and increase the yield of the cultured shrimps. The overflow bars of one-way overflow structure are apart from one section of interval of diapire of breeding the pond, and the bottom mounting of baffle is on the diapire of breeding the pond to the baffle height is less than the height of breeding the pond, makes the liquid of breeding the district can one-way flow to the dirty district of collection, is favorable to the purification of water, can further purify water quality.

In addition, the embodiment also provides an industrial procambarus clarkii culture method, which is applied on the basis of the culture system and comprises the following steps:

(1) 3 days before the shrimp larvae are put in, water is respectively injected into the culture area and the mixing area to a certain depth, water bodies in the culture area and the mixing area are respectively disinfected, the whole culture system is also disinfected, and all biological colonies in the culture system are killed.

The depth of the aquaculture water body in the aquaculture system can be set according to the size of the aquaculture system, and the optimal water injection depth is 1.2 meters.

(2) And (4) increasing oxygen from the bottom of the culture area 2 days before the shrimp fries are put in so as to aerate the culture water body.

(3) Adding a biological carbon source into the culture area 1 day before the shrimp larvae are put in, wherein the biological carbon source accounts for 0.01 per mill of the volume of the culture water body in the culture area, and comprises chitosan enzyme, chitosan oligosaccharide and molasses.

(4) On the day of putting the shrimp seeds, putting the shrimp seeds of the procambarus clarkii into the culture area, and increasing oxygen from the bottom of the culture area in the whole process of putting, wherein excrement of the shrimp seeds is used as a biological nitrogen source.

(5) And putting shrimp milk powder with the weight of 2-4% of the weight of the procambarus clarkii in the mixing area every morning and evening every day, forming food mixed liquid in the mixing area, conveying the food mixed liquid into the culture area from the mixing area, wherein the food mixed liquid is input from the top of one end of the culture area, and after the conveying of the food mixed liquid is finished, supplying water from the bottom of the same end of the culture area through the mixing area.

(6) Meanwhile, putting biological bacterial colonies with the weight of 2-4% of the weight of the procambarus clarkii and a biological carbon source accounting for 0.01 per thousand of the volume of the culture water body into the mixing zone every 3-5 days to form source mixed liquid of biological floccules in the mixing zone, and conveying the source mixed liquid into the culture zone from the mixing zone, wherein the source mixed liquid is input from the top of one end of the culture zone, and after the source mixed liquid is conveyed, water is supplied from the bottom of the same end of the culture zone through the mixing zone; the biological bacteria colony forms biological floccules in the culture area under the promotion of a biological nitrogen source and a biological carbon source.

(7) And adding the water evaporated by the culture system into the mixing area every 10-20 days, and supplying liquid into the culture area to keep the depth of the culture water body in the culture area unchanged.

(8) After 15-20 days of cultivation, removing granular biological floccules in the cultivation area.

Wherein, the PH of the culture water body in the culture area is kept between 7.2 and 8.4 in the whole culture process.

The traditional biological flocculation technology has the defects that:

the first is that the biological flocculation technology is applied to production, and an implementer is required to have certain related knowledge background;

secondly, the culture of the biological floccules needs to additionally increase an organic carbon source, adjust the alkalinity cost and improve the water body mixing strength (aeration) cost; in the whole culture process, a carbon source is added according to the feed feeding amount every day, so that the labor cost is additionally increased;

and thirdly, the organic carbon source is added to promote the formation and growth of biological flocs, when the content of the flocs is too high, the branchia of the prawns is bound to be blocked, the growth of the prawns is influenced, and redundant and aged flocs need to be removed from the aquaculture water body in time to prevent the flocs from depositing at the bottom of the pond. Therefore, how to control the floc content is a problem to be solved urgently.

The invention utilizes the biological carbon source formed by combining the chitosanase and the chitosan oligosaccharide through the biological bacterial colony, and utilizes the excrement of the shrimp fry or the shrimp fry corpse as the biological nitrogen source, the formed biological floccule can decompose the dead shell of the procambarus clarkia and the procambarus clarkia, and provides enough shrimp feed for the procambarus clarkia, thereby ensuring the water quality of the culture water body, improving the survival rate of the culture and further improving the yield of the procambarus clarkia. And the mixed liquid is supplied from the top of one end of the culture area, and water is supplied from the bottom, so that the biological flocs can be fully and uniformly mixed in the culture area, sufficient shrimp feed can be provided for the procambarus clarkia, and the growth of the procambarus clarkia is promoted. The invention can avoid blocking the gill part of the procambarus clarkii due to the accumulation of more biological flocs by removing the granular biological flocs, and improve the survival rate of the procambarus clarkii.

The chitosan oligosaccharide can activate T lymphocytes, thereby promoting the release of Macrophage Activating Factor (MAF), further activating macrophages, and further enhancing the disease resistance of the cultured procambarus clarkii.

The shells of the procambarus clarkii are decomposed into chitin in biological floccules and an alkaline water environment and then degraded into chitosan, and finally the chitosan oligosaccharide is further reduced under the action of chitosan enzyme. The chitosanase fixed by DEAE cellulose has better reusability. Therefore, the added chitosanase can not only decompose the shrimp shells separated from the procambarus clarkii culture, but also convert the shrimp shells into chitosan oligosaccharide by reutilization.

The chitosan oligosaccharide and the molasses can provide a carbon source for biological floc reaction, promote heterotrophic microorganisms in water to assimilate and absorb ammonia nitrogen and nitrite nitrogen, and convert the ammonia nitrogen and nitrite nitrogen into protein required by self growth and propagation. The biological floc is a zooglea formed by gathering heterotrophic bacteria, nitrobacteria, fungi, algae, protozoa and secretion such as polysaccharide by using filamentous bacteria as a framework through electrostatic attraction or extracellular polymers secreted by microorganisms, and is suspended in a water body.

Therefore, the invention conveys the biological floccules to the culture area and utilizes the biological floccules technology to culture the procambarus clarkii. The proportions of the chitosanase, the chitosan oligosaccharide and the molasses are not particularly limited as long as biological floccules are easy to form, and in the embodiment, the biological carbon source can be prepared by mixing the chitosanase, the chitosan oligosaccharide and the molasses according to the weight ratio of 1:4: 5.

The biological bacterial colony can be prepared by mixing saccharomycetes, photosynthetic bacteria, bacillus and nitrobacteria according to the weight ratio of 1:2:2: 5. The effects of the four bacterial components are as follows: 1. the saccharomycetes improve the activity of chitosanase, accelerate the decomposition speed of shrimp shells and protect the intestinal function of cultured procambarus clarkii; 2. the photosynthetic bacteria can degrade toxic substances such as nitrite, sulfide and the like in the water body, and realize the functions of serving as bait, purifying water quality, preventing diseases, serving as feed additives and the like; 3. the bacillus has the characteristics of fast propagation and strong vitality, can inhibit the growth and propagation of harmful microorganisms such as harmful bacteria, pathogenic bacteria and the like while propagating, can release high-activity decomposition enzyme, and decomposes difficultly decomposed macromolecular substances into utilizable micromolecular substances; 4. nitrifying bacteria are called "oxidators of nitrous acid" because the food source they are vitamin to is nitrous acid, which in combination with oxygen produces nitric acid, the chemical energy generated being sufficient for them to survive. Therefore, the nitrifying bacteria can decompose and remove toxic chemical substances (ammonia and nitrous acid) in the water, and have the function of purifying the water. Wherein the biological flocs can be removed by a device specially used for removing granular biological flocs, in the following description of the embodiment, a biological floc separation device will be described, which realizes the above-mentioned removal process.

In summary, compared with the existing procambarus clarkia cultivation method, the industrial procambarus clarkia cultivation method of the embodiment has the following advantages:

according to the industrial procambarus clarkia cultivation method, the cultivation system and the cultivation water body are disinfected, oxygen is added to the cultivation water body, the water quality of the cultivation water body is improved, the oxygen content is improved, the growth of the procambarus clarkia is facilitated, the growth speed is improved, and the yield of the procambarus clarkia is further improved.

Referring to fig. 3, the removal of the granular biological flocs in the culture area can be achieved by the biological floc separating device provided in this embodiment, and the separating device includes a stripping water pump 26, a first material conveying pipe 27, a sedimentation separator 28, a second material conveying pipe 30, a return pipe 31, a solid collector 32, a filter screen 34, a water quality detecting module, an oxygen content detecting module, an oxygen enriching mechanism, and a controller.

The air stripping pump 26 is used for sucking the aquaculture water in the aquaculture area, and of course, the aquaculture water in the sewage collecting area or the mixing area can also be sucked. The air stripping water pump 26 is positioned in the culture pond 10 and can absorb the biological flocs, so that the phenomenon that the gills of aquatic products are blocked by the biological flocs when the concentration is too high is avoided, the survival rate of cultured shrimps is improved, and the culture cost is reduced.

One end of the first material conveying pipe 27 is communicated with the output end of the air-lift water pump 26 so as to receive the aquaculture water of the air-lift water pump 26. The diameter of the first delivery pipe 27 can be set according to the concentration of the biological flocs, so as to prevent the biological flocs from blocking the first delivery pipe 27 when the biological flocs are too much.

The other end of the first feed conduit 27 is located in a settling separator 28, which settling separator 28 is arranged to settle and separate the biological flocs. Wherein, the biological floccules in the aquaculture water body are settled from the bottom to the top of the sedimentation separator 28 in sequence from large to small in volume. In this embodiment, the first delivery pipe 27 may be an n-shaped extraction pipe, or may be another pipe.

One end of the second feeding pipe 30 is located at the bottom of the sedimentation separator 28, and one end of the return pipe 31 is located at the top of the sedimentation separator 28, and the other end is located in the culture area. Further, the other end of the first material conveying pipe 27 is located in the middle of the sedimentation separator 28, and the other end of the return pipe 31 is higher than the liquid level of the culture water in the culture area. Thus, larger biological flocs at the bottom of the settling separator 28 pass from the second feed conveyor 30 into the solids collector 32; the smaller biological flocks, which are located at the top of the settling separator 28, flow back into the farm from the return pipe 31.

The other end of the second feed conveyor 30 is located in a solids collector 32 and the return conduit 31 is located at the end of the settler separator 28 at a level higher than the level of the solids collector 32. This allows the larger biological floes to enter the mesosolids collector 32 and be recycled to avoid contamination. In this embodiment, the second material conveying pipe 30 may be an n-shaped extraction pipe, or may be another pipe.

Wherein, the air stripping water pump 26 conveys the aquaculture water in the culture area to the sedimentation separator 28 through a first conveying pipeline 27, and biological floccules in the aquaculture water are sequentially settled from the bottom to the top of the sedimentation separator 28 according to the sequence of the sizes from large to small. The larger biological flocs at the bottom of the settling separator 28 enter the solids collector 32 through the second feed conveyor 30; the smaller biological flocks, which are located at the top of the settling separator 28, flow back into the farm from the return pipe 31.

A sieve 34 is installed in the settler separator 28 below the return pipe 31. The filter screen 34 can filter the biological flocs, prevent blockage caused by the larger biological flocs entering the return pipe 31, and ensure the purity of the aquaculture water which enters the aquaculture pond 10 again. The screen 34 may have a multi-layered structure such that the screen 34 substantially filters the biological floes. The screen 34 may be removably mounted to the inner wall of the settler 28 to facilitate mounting and dismounting the screen 34 and cleaning the screen 34.

The water quality detection module is used for detecting the water quality parameters of the culture water body in the culture area. Wherein, when the parameter value of the water quality parameter does not reach a preset water quality standard, the controller drives the air lift pump 26 to suck the aquaculture water in the aquaculture area. In this embodiment, the water quality parameter is the turbidity of aquaculture water body, and the water quality testing module is the turbidity sensor. When the turbidity detected by the turbidity sensor exceeds a preset turbidity, the controller starts the gas water pump 26. Of course, in other embodiments, the water quality parameter may also be other parameters.

The oxygen content detection module is used for detecting the oxygen content in the culture water body in the culture area, and the oxygenation mechanism is used for conveying oxygen to the sedimentation separator 28. When the oxygen content detected by the oxygen content detection module is lower than a preset oxygen content, the controller drives the oxygenation mechanism to deliver oxygen to the sedimentation separator 28. In this way, the liquid in the sedimentation separator 28 is rich in oxygen and flows back to the culture pond 10, so that the oxygen content of the liquid in the culture pond 10 is increased, and the culture efficiency is improved.

In conclusion, the biological floc separating device of the embodiment realizes the recycling of the culture water body in the culture pond 10 by arranging the culture area, the sewage collecting area and the mixing area in the culture pond 10, separates the biological floc in the culture area through the separating device, purifies the water quality in the culture pond 10, and avoids the excessive accumulation of the biological floc in the water circulation process. In the separation device of the embodiment, a stripping water pump 26 conveys aquaculture water in the culture area to a sedimentation separator 28 through a first conveying pipeline 27, so that biological floccules are deposited in the sedimentation separator 28. Meanwhile, the second material conveying pipe 30 conveys larger biological floccules to the solid collector 32, and the smaller biological floccules and the clean water flow back to the culture area through the return pipe 31, so that the culture water body is purified, the larger biological floccules capable of blocking gills of the cultured animals are separated, the growth of the cultured animals in the culture area is facilitated, and the yield of the cultured animals is improved.

Example 3

Referring to fig. 4, the biological floc separating apparatus used in the industrial procambarus clarkia cultivation method of the present embodiment is based on the electronic valve 33 in embodiment 1, and the electronic valve 33 is used to open or close the second feeding pipe 30.

And, the settling chamber of the settling separator 28 is a sealed chamber and is sealed by a sealing cover 29. The other end of the first feed conduit 27 has a cross-sectional area S, and one end of the second feed conduit 30 has a cross-sectional area S₁The cross-sectional area of one end of the return pipe 31 is S₂(ii) a Wherein S is S₁+S₂To ensure the balance of the inlet and outlet of the aquaculture water in the sedimentation separator 28. Thus, when the culture water in the sedimentation separator 28 fills up to the sealed cavity, the culture wastewater entering from the first feeding pipe 27 will press the larger biological flocs to be discharged from the second feeding pipe 30, and press the smaller biological flocs to flow back to the culture area from the return pipe 31.

Example 4

Referring to fig. 5, 6 and 7, the industrial procambarus clarkia cultivation method of the present embodiment uses a porous shrimp nest to cultivate the procambarus clarkia, wherein the porous shrimp nest is the cultivation device of embodiment 2 and is placed in the cultivation area. Wherein, porous shrimp nest includes breed container 1, location axle 2, locating plate 8 and breeds mechanism 3.

The outer contour of the breeding container 1 is cuboid, the top end of the breeding container 1 is provided with an opening for placing the breeding mechanism 3, and of course, the top end of the breeding container 1 can also be a sealing structure and is sealed by adopting a detachable sealing structure. The culture container 1 can be made of corrosion-resistant rigid materials, so that the culture container 1 is prevented from being corroded in the process of storing the culture water body for a long time, and the culture container 1 is convenient to carry. The length, the height and the width of the culture container 1 can be correspondingly designed according to the size of the culture mechanism 3, so that the culture mechanism 3 can fully occupy the space in the culture container 1. The bottom wall of the culture container 1 can be provided with a drain hole for discharging the culture wastewater, so that the culture wastewater in the culture container 1 can be discharged in time. Certainly, the top of the culture container 1 can also be provided with a water inlet hole for the culture water body to enter and exit, and the water inlet hole corresponds to the water outlet hole, so that the culture water body in the culture container 1 can be continuously replaced. The height of the culture container 1 can be set according to the height of a user, the user can conveniently access the culture mechanism 3 in the culture container 1, and the shrimp can be further accessed and cultured. It should be noted that in other embodiments, the cultivation container 1 may be directly used as a part or an entirety of a cultivation pond for cultivating shrimps.

The number of the positioning shafts 2 can be one or more, and the positioning shafts 2 are arranged in the culture container 1. The positioning shaft 2 can be made of materials used by the culture container 1, and can also be made of other materials which are corrosion-resistant and have high rigidity, so that the positioning shaft 2 can be used for a long time. The positioning shafts 2 are arranged in a matrix mode, and the length of each positioning shaft 2 is not higher than the height of the culture container 1. The positioning shaft 2 may be provided with or without a breeding hole 7, and in this embodiment, the positioning shaft 2 is not provided with or without a breeding hole 7.

The number of the positioning plates 8 is the same as that of the positioning shafts 2, each positioning plate 8 corresponds to one positioning shaft 2, and the positioning plates 8 are detachably arranged in the culture container 1. Each positioning shaft 2 is vertically arranged on a corresponding positioning plate 8, and the positioning plates 8 are placed in the culture container 1. The positioning plate 8 can be welded on the bottom wall of the culture container 1 and can also be detachably arranged in the culture container 1. The locating plate 8 can fix the locating shaft 2 and the culture container 1 relatively, so that the locating shaft 2 can be used subsequently.

The breeding mechanism 3 is plural in number, and each breeding mechanism 3 includes a breeding box 4, a fixed shaft 5, and a plurality of breeding plates 6. The breeding mechanism 3 can decompose the porous shrimp nest so as to be convenient for putting in shrimp seedlings for breeding shrimps and harvesting mature bred shrimps.

The outer contour of the breeding box 4 is cuboid, breeding holes 7 for the breeding water to enter and exit are formed in the breeding box 4, when the aperture of the breeding holes 7 is selected, the situation that the breeding holes 7 need to limit the bred shrimps to escape is considered, and therefore the cross section area of the breeding holes 7 is smaller than the maximum cross section area of the shrimp larvae. The breeding holes 7 are uniformly distributed on the breeding box 4, so that the breeding water can fully flow to increase the oxygen content in the breeding box 4, and simultaneously, enough feed is ensured to enter the breeding space in the breeding box 4, and the survival rate of the bred shrimps is improved.

The fixed shaft 5 is arranged in the cultivation box 4, and the bottom end of the fixed shaft 5 is vertically fixed on the bottom wall of the cultivation box 4. The fixing shaft 5 has a hollow structure, and in the present embodiment, the hollow structure has a through hole with a radius the same as that of the positioning shaft 2, but of course, the radius of the through hole of the hollow structure may be slightly smaller than that of the positioning shaft 2. The length of the fixed shaft 5 should be smaller than the height of the cultivation boxes 4 to satisfy the stacking of the plurality of cultivation boxes 4.

Referring to fig. 8, a plurality of cultivation plates 6 are installed on the fixed shaft 5 and divide the inner cavity of the cultivation box 4 into a plurality of cultivation spaces, each of which is used for cultivating at least one of the cultivated shrimps. Therefore, the aquaculture space can effectively prevent the aquaculture shrimps from fighting each other, and meanwhile, the aquaculture shrimps are conveniently caught, so that the survival rate of the aquaculture shrimps is improved, and the yield of the aquaculture shrimps is further improved. Specifically, each cultivation mechanism 3 comprises four cultivation plates 6, and two adjacent cultivation plates 6 are inserted into the corresponding fixed shaft 5 at intervals of 90 degrees in a surrounding manner. The cultivation plate 6 is a rectangular plate, two opposite pins 22 are arranged at the bottom end of the cultivation plate 6, and the two pins 22 are inserted into the bottom wall of the cultivation box 4. The culture plate 6 is also provided with culture holes 7 to further enhance the flow of culture water in the culture box 4 and improve the oxygen content in the culture box 4.

Referring to fig. 9, a plurality of cultivation mechanisms 3 are stacked in a cultivation container 1, and a plurality of cultivation boxes 4 are mounted on one positioning shaft 2 through the hollow structure of the corresponding fixing shaft 5 and the matching of one positioning shaft 2, so that the space in the cultivation container 1 can be utilized to the maximum, the cultivation density is improved, and the cultivation yield is further improved. In the embodiment, the distance between two positioning shafts 2 positioned in the length direction of the culture container 1 is greater than or equal to the length of the culture box 4; two positioning shafts 2 are positioned in the width direction of the culture container 1, and the distance between the two positioning shafts is larger than or equal to the width of the culture box 4.

In this embodiment, preferably, on one wall surface provided with the culture holes 7, the total hole area of all the culture holes 7 is 40% to 50% of the wall surface area.

It should be noted here that the porous shrimp nest of the present embodiment may further include a plurality of water supply pipes for the aquaculture water to enter, and the water supply pipes are inserted into the aquaculture container 1, and a plurality of water discharge pipes for the aquaculture wastewater to be discharged are also provided, and the water discharge pipes are also inserted into the aquaculture container 1. The water supply pipe and the water discharge pipe can be arranged oppositely, so that the entering aquaculture water body becomes aquaculture wastewater after passing through all the aquaculture plates 6 and is discharged from the water discharge pipe.

The porous shrimp nest that can the high-efficient breed of stromatolite batch production of this embodiment is through with a plurality of breed 3 range upon range of in breeding container 1 of mechanism to install breeding mechanism 3 through location axle 2, can maximize the space that utilizes in the breed container 1, improve breed density, and then improve and breed output. In this embodiment, set up a plurality of farming spaces in the mechanism 3 of breeding, breed the shrimp and distribute in the farming space, can prevent effectively to breed to fight between the shrimp, conveniently catch the shrimp of breeding simultaneously, and then improve the survival rate of breeding the shrimp to further improve the output of breeding the shrimp. In the prior art, the culture yield of a pond is about 250 jin/mu, the density of industrial culture is about 16 per cubic meter, the culture density of the porous shrimp nest can reach 96-120 per cubic meter, and meanwhile, under the condition of matching with the powder feed and the biological floccule culture technology, the feed and the biological floccule pass through the culture holes 7 and feed the cultured shrimps, so that the survival rate of the cultured shrimps in the porous shrimp nest can reach more than 90 percent, the yield of the cultured shrimps can be greatly increased, and the culture cost of the cultured shrimps is reduced.

Example 5

Referring to fig. 10, the multi-hole shrimp nest of the present embodiment is similar to the multi-hole shrimp nest of embodiment 4, and the difference is that a plurality of cultivation plates 6 are detachably mounted on a fixed shaft 5, and a cultivation container 1 is provided with water-permeable holes 35 for the cultivation water to enter and exit.

It should be noted here that the culture container 1 is independent of the culture pond, and can be used for conveniently throwing the shrimp feed. Because the culture density of the cultured shrimps in the culture container 1 is high, and meanwhile, in some special use environments, if the culture container 1 needs to be placed in the culture water body, the water permeable holes 35 on the culture container 1 can enable the culture water body to fully enter and exit so as to improve the oxygen content in the culture box 4, and meanwhile, enough feed can be ensured to enter the culture space in the culture box 4, so that the survival rate and the culture yield of the cultured shrimps are improved. And breed the board 6 and can follow the dismantlement on the fixed axle 5, can conveniently wash and breed mechanism 3, conveniently take out the breed shrimp after the maturity simultaneously.

Example 6

Referring to fig. 11, 12 and 13, the present embodiment provides a porous shrimp nest similar to the porous shrimp nest of embodiment 4, and the only difference is that the outer contour of the cultivation box 4 of the cultivation mechanism 3 is cylindrical, and each cultivation plate 6 is a circular plate. The cultivation plates 6 and the cultivation box 4 are coaxially arranged, and the mounting holes 9 for inserting the fixing shafts 5 are formed in the middle of the cultivation plates 6, so that the cultivation plates 6 are overlapped in the cultivation box 4, but the gaps between the cultivation plates 6 need to be guaranteed, and the shrimps can move and live. Wherein, the cultivation box 4 at the topmost layer is provided with a cover plate 23, and the bottom surface of the cover plate 23 is provided with a connecting hole matched with the top end of the positioning shaft 2, so that the cover plate 23 covers the top end of the cultivation box 4. Of course, the cover plate 23 is also provided with culture holes 7 so that the culture water body can enter and exit.

Referring to fig. 14 and 15, the top of the cultivation box 4 is an open structure for facilitating the subsequent installation of the cultivation boards 6. In the embodiment, the cultivation box 4 is provided with the detachable bottom plate 24, so that the inner wall of the cultivation box 4 is convenient to clean, and the assembly and disassembly are convenient; in other embodiments, the bottom plate 24 of the cultivation box 4 may be integrally formed on the bottom of the cultivation box 4 to improve the sealing performance of the cultivation box 4. The height of the breeding box 4 can be selected according to the depth of the breeding water body, and also can be set according to the breeding density, the radius of the breeding box 4 can be correspondingly set according to the space of the required activities of the breeding shrimps, the space can be guaranteed to be utilized to the maximum to breed the breeding shrimps, and the yield of the breeding shrimps is improved. The breeding box 4 can be made of corrosion-resistant rigid materials, so that the breeding box 4 is prevented from being aged due to being in a breeding water body for a long time, and meanwhile, the bred shrimps are prevented from digging holes in the breeding box 4 and escaping.

The fixed shaft 5 is provided with a limiting structure, and the limiting structure is used for limiting the movement of the culture plate 6 relative to the fixed shaft 5. Wherein, limit structure has following structure:

for example, referring to fig. 16, the limiting structure is a thread surrounding the fixing shaft 5, and the mounting hole 9 is a screw hole; the breeding plate 6 is mounted on the fixed shaft 5 by matching screw threads with screw holes. So, when the board 6 is bred in the installation, only need to breed the board 6 and pass through 5 spiro unions of fixed axle and go into to breed the container 1, can be convenient for breed the equipment and the dismantlement of board 6, prevent the vertical displacement of breeding the board 6 simultaneously, conveniently set up porous shrimp nest.

For another example, referring to fig. 17, the limiting structure is a plurality of limiting strips coaxially disposed with the fixed shaft 5. The number of spacing strip can be one, also can be many, in this example, the number of spacing strip is four to evenly encircle and integrated into one piece on the outside of fixed axle 5. Thus, the limiting strips can prevent the cultivation plate 6 from rotating relative to the fixed shaft 5. In order to provide the culture plates 6 with a space therebetween, a protrusion may be provided at the center of the bottom surface of the culture plates 6, and the protrusion may abut against the other culture plates 6 to provide the space.

Example 7

Referring to fig. 18 and 19, the multi-hole shrimp nest of the present embodiment is similar to the multi-hole shrimp nest of embodiment 4, and the only difference is that a plurality of cultivation plates 6 are stacked at equal intervals in the cultivation box 4. The fixed shaft 5 comprises a plurality of sections of fixed joints which are coaxially arranged and connected, and the radiuses of the plurality of sections of fixed joints are sequentially increased from top to bottom. Holes arranged on the middle parts of the culture plates 6 are matched with the fixed joints, so that each fixed joint corresponds to one culture plate 6. Thus, when the cultivation density is set, only the number of the fixed sections needs to be set. When the cultured shrimps are taken and placed, the corresponding culture plates 6 can be detached or installed layer by layer, and the cultured shrimps are taken out or placed in, so that the culture efficiency is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. An industrial procambarus clarkii breeding method is applied to a breeding system and is characterized in that the breeding system is provided with a breeding area, a plurality of isolation nets (36) which are arranged in parallel and at equal intervals are arranged in the breeding area, and the breeding area is divided into a plurality of breeding spaces (37) by the isolation nets (36);

the breeding method comprises the following steps:

step one, putting procambarus clarkii parents into a breeding space (37) according to the ratio of 1:1 of male to female at the density of 20-30 procambarus clarkii parents per cubic water body;

step two, culturing at least one female shrimp spawned after mating in a breeding space (37) at a controlled temperature;

step three, hatching shrimp eggs:

secondly, after the shrimp eggs grow to be orange, washing the shrimp eggs by using water with the flow rate of 2-5cm/s to promote the shrimp eggs to be separated from the parent bodies, and putting the separated shrimp eggs into an incubation barrel at the temperature of 9-12 ℃ for storage; wherein, in the second mode, the shrimp eggs which have been hatched to the flea larval stage are put into a low-temperature hatching barrel for aeration preservation;

taking out the isolation net (36) and the seed shrimps after the shrimp seedlings are out of the film, and hanging a plurality of cross-shaped plastic brushes in the culture area;

the porous shrimp nest comprises:

a culture container (1);

at least one positioning shaft (2) arranged in the culture container (1);

at least one positioning plate (8) corresponding to at least one positioning shaft (2), wherein each positioning shaft (2) is vertically arranged on the corresponding positioning plate (8), and the positioning plates (8) are arranged in the culture container (1); and

the cultivation system comprises a plurality of cultivation mechanisms (3), wherein each cultivation mechanism (3) comprises a cultivation box (4), a fixed shaft (5) and a plurality of cultivation plates (6); the fixed shaft (5) is arranged in the breeding box (4), and the bottom end of the fixed shaft (5) is vertically fixed on the bottom wall of the breeding box (4); the fixed shaft (5) has a hollow structure; the cultivation plates (6) are arranged on the fixed shaft (5) and divide the inner cavity of the cultivation box (4) into a plurality of cultivation spaces, and each cultivation space is used for cultivating at least one cultivated shrimp; a plurality of culture holes (7) for the culture water to enter and exit are formed in the culture box (4) and the culture plate (6); the plurality of culture mechanisms (3) are arranged in the culture container (1) in a stacked mode, and the plurality of culture boxes (4) are matched with one positioning shaft (2) through the hollow structure of the corresponding fixing shaft (5) and are installed on the positioning shaft (2).

2. The industrial procambarus clarkii breeding method of claim 1 wherein in step three, the method of separating shrimp larvae from the female shrimps and incubating the larvae at a controlled temperature to form juvenile shrimps comprises:

3. The industrial procambarus clarkii breeding method of claim 1, wherein the suspended cross-shaped plastic brush has a spacing of 2-5cm from the bottom of the culture area.

4. The industrial procambarus clarkii breeding method according to claim 1, wherein in the second step, the temperature-controlled cultivation method comprises the following steps:

5. The industrial procambarus clarkii breeding method according to claim 2, wherein the temperature of the water in the aquaculture water is lowered by 1-2 degrees per day after the female shrimps have their eggs and the eggs have grown to the flea larval stage, and finally the temperature of the water is between 16-18 degrees; when 80-90% of shrimp eggs develop to orange and eyespots can be observed, the water temperature is increased to 24 ℃ for 3 consecutive days to stimulate the shrimp larvae to synchronously separate from the parent.

6. The industrial procambarus clarkii breeding method of claim 1 wherein the farming system further comprises a sewage collection area and a mixing area;

the cultivation area, the sewage collection area and the mixing area are three areas separated in a cultivation pool (10), water flow in the cultivation area flows to the mixing area through the sewage collection area in a one-way mode, and liquid mixed with feed, biological carbon sources and microbial preparations is conveyed to the cultivation area through at least one water suction pump (14) in the mixing area so as to form a cultivation system with water flowing in a one-way mode.

7. The industrial procambarus clarkii breeding method according to claim 6, wherein the mixing zone is further provided with an aeration pipe (21), and the feed is a powdered feed, the biological carbon source is a water-soluble carbon source, and the microbial agent is a powdered engineering bacterium or a microbial culture solution; the aeration pipe (21) is used for increasing oxygen to the mixing area, and the air discharged by the aeration pipe (21) in the mixing area drives the water body in the mixing area to stir so as to mix the feed, the biological carbon source and the microbial agent into the liquid in the mixing area.

8. The industrial procambarus clarkii breeding method according to claim 6, wherein a baffle is arranged in the culture pond (10), and the baffle is arranged along the length direction of the culture pond (10) and divides the culture pond (10) into two independent accommodating grooves; in two holding grooves, the holding groove with smaller volume is the mixing area, the holding groove with larger volume is separated into the breeding area and the sewage collecting area through a one-way overflow structure.

9. The industrial Procambrus clarkii breeding method according to claim 7,

a plurality of oxygenation pipes (11) are arranged at the bottom of the culture area, and at least one water inlet pipe (12) is arranged at the water inlet end of the culture area; a plurality of oxygenation pipes (11) are arranged in parallel and at equal intervals;

an air blower (15) is arranged on the outer side of the culture pond (10), and the air blower (15) is used for conveying air to the oxygenation pipe (11) and the aeration pipe (21);

the cultivation area is further provided with an air pushing pipe (16), the same ends of the oxygenation pipes (11) are communicated with the air pushing pipe (16), and an air outlet of the air blower (15) is communicated with an air inlet of the air pushing pipe (16).

10. The industrial procambarus clarkii breeding method of claim 6 wherein the sewage collection area is separated from the water discharge end of the culture area by a one-way overflow structure; liquid in the culture area flows to the sewage collecting area in a unidirectional mode through the unidirectional overflow structure; an overflow port (13) for allowing the liquid in the sewage collecting area to flow to the mixing area is formed in the upper part of the sewage collecting area;

the one-way overflow structure comprises at least one layer of overflow grid (19) and at least one partition plate (20) separated from the overflow grid (19); the overflow grid (19) and the partition plate (20) are both vertical to the bottom wall of the culture pond (10); the overflow grid (19) has a distance with the bottom wall of the culture pond (10); the bottom end of the partition plate (20) is fixed on the bottom wall of the culture pond (10), the height of the partition plate (20) is lower than that of the culture pond (10), and the height of the overflow port (13) is lower than that of the partition plate (20).