CN109997766B - Upflow sand bed shellfish offspring seed cultivation device and use method thereof - Google Patents
Upflow sand bed shellfish offspring seed cultivation device and use method thereof Download PDFInfo
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- CN109997766B CN109997766B CN201910314806.0A CN201910314806A CN109997766B CN 109997766 B CN109997766 B CN 109997766B CN 201910314806 A CN201910314806 A CN 201910314806A CN 109997766 B CN109997766 B CN 109997766B
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- 239000004576 sand Substances 0.000 title claims abstract description 83
- 235000015170 shellfish Nutrition 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 195
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 241000237852 Mollusca Species 0.000 claims description 4
- 230000000366 juvenile effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 abstract description 3
- 230000001174 ascending effect Effects 0.000 abstract description 2
- 230000004083 survival effect Effects 0.000 description 7
- 238000011218 seed culture Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 241000237519 Bivalvia Species 0.000 description 1
- 241000237502 Ostreidae Species 0.000 description 1
- 241000237503 Pectinidae Species 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 235000020639 clam Nutrition 0.000 description 1
- 238000012364 cultivation method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000009364 mariculture Methods 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 235000020636 oyster Nutrition 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000020637 scallop Nutrition 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/045—Filters for aquaria
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/047—Liquid pumps for aquaria
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention discloses a device for cultivating shellfish offspring seeds by an ascending sand bed, which comprises an offspring seed cultivating pool, a water inlet pipe I, a water outlet pipe, a main water pipe and a plurality of branch water pipes, wherein the main water pipe is laid at the bottom of the offspring seed cultivating pool; the tail end of the main water pipe is sealed, the front end of the main water pipe is communicated with the water inlet pipe I, the branch water pipes are positioned at the left side and the right side of the main water pipe, the tail end of each branch water pipe is sealed, the front end of each branch water pipe is communicated with the main water pipe, and the branch water pipe is provided with a water outlet; a sand layer is paved at the bottom of the seed cultivation pool, and a coarse sand layer, a fine sand layer and a silt layer are sequentially arranged above the sand layer; the middle position of the pool bottom is provided with a drain hole, the bottom end of the drain pipe is communicated with the drain hole, and the top end of the drain pipe is exposed out of the silt layer. The invention adopts the upward sand bed device in the seed cultivation, can better improve the substrate environment, increases the attached seed density, ensures that the cultivation density can reach ten times to more than ten times of the conventional cultivation density, and ensures that the seeds can normally develop.
Description
Technical Field
The invention belongs to the technical field of aquaculture, and particularly relates to a device for cultivating shellfish offspring seeds on an ascending fluid sand bed and a use method thereof.
Background
The sea shellfish culture industry is huge in China, shellfish culture is an important member of the sea shellfish culture industry, and the yield of the sea shellfish culture industry is 80% of the total sea shellfish culture yield in China. Common bivalve shellfish such as clams, oysters, scallops and the like are delicious in taste and rich in nutrition, and have important economic value. With the continuous development of artificial culture technology, high-efficiency industrialized seedling raising mode is more important, and shellfish growing and culture become an important part of the mariculture industry. In the industrial seedling raising process of bivalve shellfish, the intermediate cultivation of young shellfish is a key technology. Research shows that the survival rate of young shellfish with the shell length of 300-1000 μm is lower than 10% in the field, and the survival rate of young shellfish with the shell length of 3mm in the field can reach more than 85%. Therefore, how to increase the survival rate and the growth rate of the young shellfish from the post-metamorphosis stage to the stage of growing to 3mm is of great importance for the intermediate cultivation of the young shellfish.
The traditional artificial breeding mostly adopts a mode of cultivating the young shellfish without sand at the bottom of the pond, and the cultivation mode has the defects of slow growth, high death rate, low bait utilization rate and the like. Along with the development of technology in recent years, an upflow system is used for intermediate cultivation of young shellfish, vertical water flow from bottom to top is utilized to flow through the young shellfish, fresh seawater and bait are continuously provided for the young shellfish, the survival rate and the growth rate of the young shellfish are greatly improved, and meanwhile, the upflow system has the advantages of easiness in maintenance, effective utilization of cultivation space, long service life, cost saving and the like.
The utility model patent CN 109169442A discloses a closed inflatable upflow cultivation device for cultivating bivalve shellfish fries in the middle, which comprises a cultivation tube, a negative pressure tube, a filter screen, an inflatable device and a water outlet tube, wherein the cultivation tube is the outermost layer of the whole device, the bottom end of the cultivation tube is provided with a layer of filter screen, the side wall of the upper end of the cultivation tube is provided with a water outlet hole, the negative pressure tube is arranged in the cultivation tube, the bottom end of the negative pressure tube is provided with a layer of filter screen, one end of the water outlet tube is communicated with the negative pressure tube, the other end of the water outlet tube is arranged at the water outlet hole of the cultivation tube, and the inflatable device is arranged on the filter screen in the negative pressure tube. The cultivation method using the device greatly saves hydropower resources, the growth rate of young shellfish is improved by 20% -50% compared with the traditional method, the survival rate is up to more than 90%, and the seawater and bait are saved by more than 70%. However, the device of the patent is closed, and is not suitable for improving the water quality in the large-scale batch continuous cultivation process of the seedlings.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the upflow sand bed shellfish offspring seed cultivation device to solve the technical problem that the water quality is easy to be destroyed in the large-scale batch continuous cultivation process of offspring seeds.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
The upflow sand bed shellfish offspring seed cultivating device comprises an offspring seed cultivating pool, a water inlet pipe I, a water outlet pipe, a main water pipe and a plurality of branch water pipes, wherein the main water pipe is laid at the bottom of the offspring seed cultivating pool; the tail end of the main water pipe is sealed, the front end of the main water pipe is communicated with the water inlet pipe I, the branch water pipes are positioned at the left side and the right side of the main water pipe, the tail end of each branch water pipe is sealed, the front end of each branch water pipe is communicated with the main water pipe, and the branch water pipe is provided with a water outlet; a sand layer is paved at the bottom of the seed cultivation pool, and a coarse sand layer, a fine sand layer and a silt layer are sequentially arranged above the sand layer; the middle position of the pool bottom is provided with a drain hole, the bottom end of the drain pipe is communicated with the drain hole, and the top end of the drain pipe is exposed out of the silt layer.
Preferably, the water inlet pipe I is provided with a water quantity regulating valve I.
Preferably, the seed cultivation device further comprises a water inlet pipe II for supplementing a water source for the seed cultivation pool, and a water quantity regulating valve II is arranged on the water inlet pipe II.
Preferably, the main water pipe, the branch water pipe and the drain pipe are all hard PVC pipe fittings; the main water pipe has a size phi of 50-63mm; the size of the branch water pipe is phi 20-25mm; the distance between the adjacent branch water pipes positioned on the same side is 80cm.
Preferably, the water branch pipe is provided with water outlet holes at intervals of 20-30cm, the water outlet holes are arranged above the side of the water branch pipe and are symmetrically arranged, and an included angle of 120 degrees is formed between every two adjacent water outlet holes; the size of the water outlet hole is phi 2.0mm, and the total area of all the water outlet holes is 2 times of the cross section area of the main water pipe.
Preferably, the size of the drain pipe is phi 150-200mm, and the top end of the drain pipe is 30cm higher than the upper surface of the silt layer.
Preferably, the particle sizes of the sand layer, the coarse sand layer, the fine sand layer and the silty sand layer are sequentially reduced; the thickness of the sand layer is 8-10cm, and the particle size is 8-15mm; the thickness of the coarse sand layer is 6-8cm, and the grain diameter is 2-4mm; the thickness of the fine sand layer is 6-8cm, and the grain diameter is 1-2mm; the thickness of the silt layer is 6-10 cm, and the grain diameter is 0.2-0.5mm.
Preferably, a screen I is arranged between the sand layer and the coarse sand layer, the mesh size of the screen I is 20 meshes, and the screen I is two layers; a screen II is arranged between the coarse sand layer and the fine sand layer, and the mesh size of the screen II is 30-40 meshes; a screen III is arranged between the fine sand layer and the silt layer, and the mesh size of the screen III is 60-80 meshes.
Furthermore, the invention also provides a use method of the upflow sand bed shellfish offspring seed cultivation device, which comprises the following steps:
(1) Opening a water quantity regulating valve I on a water inlet pipe I, enabling water flow to flow through each branch water pipe along a main water pipe, enabling water flow to enter the bottom of a pool from water outlets distributed everywhere, and sequentially filtering water bodies through a sand layer, a coarse sand layer, a fine sand layer and a silt layer along with rising of water level;
(2) The water body passes through the upper surface of the silt layer through the filtration in the step (1) and is utilized by juvenile mollusks attached to the silt layer;
(3) The excrement generated after a large amount of juvenile mollusks filter food is deposited on the surface of the silt layer, floats on the surface of a water layer along with the rising of the water level, the water body overflows the top end of the drain pipe, and the excrement on the surface of the water body enters the drain pipe along with the water flow and is discharged through the drain hole at the bottom of the pool.
(4) When the seeds in the seed culture pond reach the specification, the seeds can be taken out for production.
Preferably, in the step (3), when the water quantity in the seed culture pond is insufficient, the water quantity regulating valve II on the water inlet pipe II is opened, and water is directly injected into the seed culture pond.
Compared with the prior art, the invention has the advantages that:
The invention adopts the upward sand bed device in the seed cultivation, can better improve the substrate environment, increases the attached seed density, ensures that the cultivation density can reach ten times to more than ten times of the conventional cultivation density, and ensures that the seeds can normally develop. By adopting the device and the method, the bait casting quantity and the water exchange quantity can be increased, so that the survival rate and the growth speed of seedlings are improved, and the growth speed of the attached seedling shells is obviously higher than that of the attached seedlings at the normal bottom layer by about 50 percent.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the structure of the upflow sand bed shellfish offspring seed cultivation device of the present invention;
FIG. 2 is a schematic diagram of a water pipe layout;
FIG. 3 is a schematic view of a branch water pipe;
FIG. 4 is an enlarged schematic cross-sectional view of a branch water pipe;
Reference numerals: 1. a seed cultivation pool; 2. a water inlet pipe I; 3. a water quantity regulating valve I; 4. a water inlet pipe II; 5. a water quantity regulating valve II; 6. a drain pipe; 7. a drain hole; 8. a main water pipe; 9. a branch water pipe; 10. a water outlet hole; 11. a sand layer; 12. coarse sand layer; 13. fine sand layer; 14. a silt layer; 15. a screen I; 16. a screen II; 17. screen III.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in figures 1-3, the upflow sand bed shellfish offspring seed cultivation device comprises an offspring seed cultivation pool 1, a water inlet pipe I2, a water inlet pipe II 4, a water outlet pipe 6, a main water pipe 8 and a plurality of branch water pipes 9, wherein a water quantity regulating valve I3 is arranged on the water inlet pipe I2, and a water quantity regulating valve II 5 is arranged on the water inlet pipe II 4. The main water pipe 8 is laid in the bottom of the seed cultivation pond 1, the tail end of the main water pipe 8 is closed, the front end of the main water pipe 8 is communicated with the water inlet pipe I2, the branch water pipes 9 are positioned on the left side and the right side of the main water pipe 8, the tail end of each branch water pipe 9 is closed, the front end of each branch water pipe 9 is communicated with the main water pipe 8, and water outlet holes 10 are formed in the branch water pipes 9. The main water pipe 8, the branch water pipe 9 and the drain pipe 6 are all hard PVC pipe fittings, the main water pipe 8 has the size phi of 50-63mm, the branch water pipe 9 has the size phi of 20-25mm, and the distance between the adjacent branch water pipes 9 positioned on the same side is 80cm. A water outlet hole 10 is formed in the water branch pipe 9 at intervals of 20-30cm, the water outlet holes 10 are formed above the side of the water branch pipe 9 and are symmetrically arranged, and an included angle of 120 degrees is formed between every two adjacent water outlet holes 10; the size of the water outlet holes 10 is phi 2.0mm, and the total area of all the water outlet holes 10 is 2 times of the cross section area of the main water pipe 8.
The bottom of the seed cultivation pond 1 is paved with a sand stone layer 11, and a coarse sand layer 12, a fine sand layer 13 and a silt layer 14 are sequentially arranged above the sand stone layer 11. The particle sizes of the sand layer 11, the coarse sand layer 12, the fine sand layer 13 and the silt layer 14 are sequentially reduced; the thickness of the sand layer 11 is 8-10cm, and the particle size is 8-15mm; ; the thickness of the coarse sand layer 12 is 6-8cm, and the grain diameter is 2-4mm; the thickness of the fine sand layer 13 is 6-8cm, and the grain diameter is 1-2mm; the thickness of the silt layer 14 is 6-10 cm, and the grain diameter is 0.2-0.5mm. A screen I15 is arranged between the sand layer 11 and the coarse sand layer 12, the mesh size of the screen I15 is 20 meshes, and the screen I15 is two layers; a screen II 16 is arranged between the coarse sand layer 12 and the fine sand layer 13, and the mesh size of the screen II 16 is 30-40 meshes; ; a screen III 17 is arranged between the fine sand layer 13 and the silt layer 14, and the mesh size of the screen III 17 is 60-80 meshes. The middle position of the pool bottom is provided with a drain hole 7, the bottom end of the drain pipe 6 is inserted in the drain hole 7 and is communicated with the drain hole 7, and the top end of the drain pipe 6 is exposed out of the silt layer 14. The drain pipe 6 has a dimension phi of 150-200mm, and the height of the drain pipe is generally 30cm higher than the upper surface of the silt layer 14 according to the cultivation requirements.
The application method of the upflow sand bed shellfish offspring seed cultivation device comprises the following steps:
(1) Opening a water quantity regulating valve I on a water inlet pipe I2, enabling water flow to flow through each branch water pipe 9 along a main water pipe 8, enabling water flow to enter the bottom of a pool from water outlet holes 10 distributed everywhere, and sequentially filtering water bodies through a sand layer 11, a coarse sand layer 12, a fine sand layer 13 and a silt layer 14 along with rising of water level;
(2) The water body is filtered in the step (1) and overflows the upper surface of the silt layer 14, and is utilized by young shellfish attached to the silt layer 14;
(3) The excrement generated after a large amount of juvenile mollusks are filtered and eaten is deposited on the surface of the silt layer 14 and floats on the surface of a water layer along with the rising of the water level, the water body overflows the top end of the drain pipe 6, and the excrement on the surface of the water layer enters the drain pipe 6 along with the water flow and is discharged through the drain hole 7 at the bottom of the pool, so that the purposes of purifying the substrate and the water quality are achieved. When the water quantity in the seed culture pond 1 is insufficient, the water quantity regulating valve II 5 on the water inlet pipe II 4 is opened, water is directly injected into the seed culture pond 1, and the water adding efficiency is improved.
(4) According to the production requirement, when the seedlings in the seedling cultivation pool 1 reach the specification, the seedlings can be taken out for production.
By using the seed cultivating device, the bait casting amount and the water changing amount are increased, the survival rate and the growth speed of the seeds can be improved, and the actual application shows that the growth speed of the attached seed shells is obviously higher than that of the attached seed at the normal bottom layer by about 50%.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (7)
1. The use method of the upward flowing sand bed shellfish offspring seed cultivation device is characterized in that the upward flowing sand bed shellfish offspring seed cultivation device comprises an offspring seed cultivation pool, a water inlet pipe I, a water outlet pipe, a main water pipe and a plurality of branch water pipes, wherein the main water pipe is laid at the bottom of the offspring seed cultivation pool; the tail end of the main water pipe is sealed, the front end of the main water pipe is communicated with the water inlet pipe I, the branch water pipes are positioned at the left side and the right side of the main water pipe, the tail end of each branch water pipe is sealed, the front end of each branch water pipe is communicated with the main water pipe, and the branch water pipe is provided with a water outlet; a sand layer is paved at the bottom of the seed cultivation pool, and a coarse sand layer, a fine sand layer and a silt layer are sequentially arranged above the sand layer; a drain hole is formed in the middle of the pool bottom, the bottom end of the drain pipe is communicated with the drain hole, and the top end of the drain pipe is exposed out of the silt layer;
the water inlet pipe I is provided with a water quantity regulating valve I, the seed cultivation device also comprises a water inlet pipe II for supplementing a water source for the seed cultivation pool, and the water inlet pipe II is provided with a water quantity regulating valve II;
The application method comprises the following steps:
1) Opening a water quantity regulating valve I on a water inlet pipe I, enabling water flow to flow through each branch water pipe along a main water pipe, enabling water flow to enter the bottom of a pool from water outlets distributed everywhere, and sequentially filtering water bodies through a sand layer, a coarse sand layer, a fine sand layer and a silt layer along with rising of water level;
2) The water body passes through the upper surface of the silt layer through the filtration of the step 1) and is utilized by the juvenile mollusks attached to the silt layer;
3) The excrement generated after a large amount of young shellfish is filtered and eaten is deposited on the surface of the silt layer and floats on the surface of the water layer along with the rising of the water level, the water body overflows the top end of the drain pipe, and the excrement on the surface of the water body enters the drain pipe along with the water flow and is discharged through the drain hole at the bottom of the pool;
4) And when the seedlings in the seedling culture pond reach the specification, taking out the seedlings for production.
2. The method of claim 1, wherein in step 3), when the water amount in the offspring seed cultivation pool is insufficient, the water amount adjusting valve II on the water inlet pipe II is opened, and water is directly injected into the offspring seed cultivation pool.
3. The method for using the upflow sand bed shellfish offspring seed cultivation device according to claim 1, wherein the main water pipe, the branch water pipe and the drain pipe are all hard PVC pipe fittings; the main water pipe has a size phi of 50-63mm; the size of the branch water pipe is phi 20-25mm; the distance between the adjacent branch water pipes positioned on the same side is 80cm.
4. The method for using the upflow sand bed shellfish offspring seed cultivation device according to claim 3, wherein the water outlet pipe is provided with a water outlet hole every 20 cm to 30cm, the water outlet holes are provided above the side of the water outlet pipe and are symmetrically arranged, and an included angle of 120 degrees is formed between the adjacent water outlet holes; the size of the water outlet hole is phi 2.0mm, and the total area of all the water outlet holes is 2 times of the cross section area of the main water pipe.
5. The method of using the upflow sand bed shellfish offspring seed cultivation apparatus according to claim 1, wherein the drain pipe has a dimension Φ150-200mm, and the top end of the drain pipe is 30cm higher than the upper surface of the silt layer.
6. The method of using the upflow sand bed shellfish offspring seed cultivation apparatus according to claim 1, wherein: the particle sizes of the sand layer, the coarse sand layer, the fine sand layer and the silty sand layer are sequentially reduced; the thickness of the sand layer is 8-10cm, and the particle size is 8-15mm; the thickness of the coarse sand layer is 6-8cm, and the grain diameter is 2-4mm; the thickness of the fine sand layer is 6-8cm, and the grain diameter is 1-2mm; the thickness of the silt layer is 6-10 cm, and the grain diameter is 0.2-0.5mm.
7. The method of using the upflow sand bed shellfish offspring seed cultivation apparatus according to claim 1, wherein: a screen I is arranged between the sand layer and the coarse sand layer, the mesh size of the screen I is 20 meshes, and the screen I is two layers; a screen II is arranged between the coarse sand layer and the fine sand layer, and the mesh size of the screen II is 30-40 meshes; a screen III is arranged between the fine sand layer and the silt layer, and the mesh size of the screen III is 60-80 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910314806.0A CN109997766B (en) | 2019-04-18 | 2019-04-18 | Upflow sand bed shellfish offspring seed cultivation device and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910314806.0A CN109997766B (en) | 2019-04-18 | 2019-04-18 | Upflow sand bed shellfish offspring seed cultivation device and use method thereof |
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| CN109997766A CN109997766A (en) | 2019-07-12 |
| CN109997766B true CN109997766B (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN112106718A (en) * | 2020-09-02 | 2020-12-22 | 宁波大学 | Ecological experimental pond of breeding |
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-
2019
- 2019-04-18 CN CN201910314806.0A patent/CN109997766B/en active Active
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|---|---|---|---|---|
| US4950912A (en) * | 1989-02-10 | 1990-08-21 | Adolph E. Goldfarb | Multi-segment play apparatus |
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| CN109169442A (en) * | 2018-11-02 | 2019-01-11 | 中国科学院海洋研究所 | A kind of enclosed gas charging upper up-flow breeding apparatus and its breeding method for bivalve shellfish seed intermediate rearing |
| CN209806856U (en) * | 2019-04-18 | 2019-12-20 | 山东省海洋生物研究院 | Device for cultivating shellfish fries on ascending quicksand bed |
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| Title |
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