CN115152664A - Dynamic migration breeding method for symbiotic nutrients of rice and fish - Google Patents
Dynamic migration breeding method for symbiotic nutrients of rice and fish Download PDFInfo
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- CN115152664A CN115152664A CN202210661688.2A CN202210661688A CN115152664A CN 115152664 A CN115152664 A CN 115152664A CN 202210661688 A CN202210661688 A CN 202210661688A CN 115152664 A CN115152664 A CN 115152664A
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
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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
- A01K61/00—Culture of aquatic animals
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/20—Cereals
- A01G22/22—Rice
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C1/00—Ammonium nitrate fertilisers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Botany (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a dynamic migration breeding method for symbiotic nutrients of rice and fish. The method mainly recycles culture tail water, introduces a filter tank to separate out culture tail water particles, adds biochar products, ammonium nitrate, urea and potassium sulfate on the basis of culture tail water particle filters to prepare environment-friendly biogas manure, puts the environment-friendly biogas manure into an ecological ditch as fertilizer, pumps the filtered culture tail water into a culture pond for recycling through a three-pond two-dam treatment system through technical measures such as precipitation, microbial decomposition, aquatic plant purification and the like, degrades and converts nitrogen, phosphorus, ammonia nitrogen, nitrite and other nutrient salts in the culture tail water to realize dynamic migration, pumps the treated culture tail water into the ditch, and then enables the culture tail water to be recycled or discharge up to the standard through centralized and connected treatment of all culture tail water of a culture base, thereby constructing modern fishery with energy conservation, emission reduction, high efficiency production, safe product, resource conservation and environmental friendliness.
Description
Technical Field
The invention relates to the technical field of rice and fish symbiotic aquaculture pollution discharge, in particular to a rice and fish symbiotic nutrient substance dynamic migration culture method.
Background
However, current fishery resources are low and need to depend on offshore resources, so a rice and fish symbiotic cultivation mode is developed domestically, such working modes solve the problems of fields and partial planting resources, but have low efficiency in the aspect of water resource utilization, the discharged tail water contains a large amount of nitrogen, phosphorus and organic matters through aquaculture, the tail water often does not meet industrial emission standards, the water quality is easy to deteriorate, under the condition that resource circulation cannot be realized through replacing a cultivation unit, in order to enable plants and fries to reach a healthy growth state, cultivation water needs to be replaced in a stable period, large-area pollution of the cultivation tail water and serious waste of water resources are easy to cause, the cultivation cost and the planting cost cannot be reduced, the composition in the cultivation tail water is clear, the key technical bottleneck restricting high yield and high efficiency of aquaculture is solved by innovating or combining the prior art, and the key technology bottleneck of improving quality, increasing efficiency, transforming and upgrading and efficiently developing circulating agriculture is developed.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a dynamic migration breeding method of symbiotic nutrients of rice and fishery, which comprises the following steps:
(1) Discharging the culture tail water of the intensive culture pond to a filter tank through a water outlet, filtering by the filter tank to obtain culture tail water particles and filter tail water, adding potassium sulfate, ammonium nitrate, urea and charcoal particles into the culture tail water particles, mixing to prepare environment-friendly biogas manure, applying the environment-friendly biogas manure as a fertilizer to soil of a planting field, discharging the filter tail water into an ecological ditch, and performing plant degradation and precipitation for 2-5 days in the ecological ditch to obtain precipitation tail water;
(2) Leading the precipitation tail water obtained in the step (1) to a first filtering dam, and performing adsorption filtration through the first filtering dam to obtain filtered precipitation tail water;
(3) Introducing the filtered and precipitated tail water obtained in the step (2) into a biological purification tank, and performing microbial decomposition and precipitation in the biological purification tank for 2-4 days to obtain microbial decomposition tail water;
(4) Introducing the microbial decomposition tail water obtained in the step (3) to a second filtering dam, and performing adsorption filtration through the second filtering dam to obtain filtered microbial decomposition tail water;
(5) Introducing the filtered microbial decomposition tail water obtained in the step (4) into a clean water pool for aquatic plants, and absorbing, decomposing and purifying the water for 2-5 days by the aquatic plants in the pool to obtain reusable tail water;
(6) Pumping the tail water which can be reused in the step (5) into a water inlet ditch by using a water suction pump, and conveying the water inlet ditch after shunting to each intensive culture pond for reuse.
Further, in the step (1), the environment-friendly biogas fertilizer is solid, and the mass ratio of potassium sulfate, ammonium nitrate, urea and biochar particles is 1:2: (3-3.5): 10.
further, the biochar particles in the step (1) are prepared by burning straws in a carbonization furnace, and the environment-friendly biogas fertilizer is obtained by mixing the culture tail water particles, ammonium nitrate, urea, biochar particles and potassium sulfate, dehydrating, drying, crushing and granulating.
Further, in the step (1), the ecological ditch is a stepped ecological ditch, and paddy rice, submerged plants and emergent aquatic plants are planted in the ecological ditch.
Further, in the step (2) and the step (4), the filtering dam is of an inverted trapezoidal structure, the depth of the filtering dam is not more than the maximum depth of the ecological ditch, and the width of an upper opening of the filtering dam is 2-2.5 m.
Further, in the step (3), a microbial preparation is added into the biological purification tank, and the microbial preparation is one or more of bacillus preparation, photosynthetic bacteria preparation, lactic acid bacteria and EM microbial inoculum.
Further, in the step (5), one or more of hygrophytes, emergent aquatic plants and submerged plants are planted in the aquatic plant clean water tank.
Further, in the step (3), the microbial preparation is decomposed into organic matters, ammonia nitrogen and nitrite in the water body, and in the step (5), the aquatic plant is degraded into nitrogen, phosphorus and algae in the water body.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the culture tail water is introduced into the filter tank to obtain culture tail water particles and filter the culture tail water, the culture tail water particles are added with potassium sulfate, ammonium nitrate, urea and charcoal particles to prepare the environment-friendly biogas fertilizer, waste is turned into wealth, the prepared environment-friendly biogas fertilizer can be used as a growth fertilizer for other crops, and can also be recycled to a plant purification module in a rice and fish symbiotic system, the environment-friendly biogas fertilizer is beneficial to the growth of planted crops, various nutrients required by plants are supplemented, and the planting cost of farmers is greatly saved;
according to the invention, through the three-pond two-dam treatment system, the system structure sequentially comprises an ecological ditch, a first filtering dam, a biological purification tank, a second filtering dam and an aquatic plant purification tank from front to back, the reusability of the filtered culture tail water treated by the system is greatly increased, through planting various aquatic plants in the ecological ditch, adopting technical measures such as precipitation, microbial decomposition, aquatic plant purification and the like, the nitrogen and phosphorus content in the filtered culture tail water is gradually reduced, the culture tail water is ensured to be recycled or discharged up to the standard, and when reaching the drainage ditch, the nutrient substances in the filtered culture tail water are dynamically transferred to help the growth of plants;
the arrangement of the aquatic plants in the aquatic plant purification pool enables the aquatic plants to increase the oxygen content of a water body through photosynthesis, the economic value of the aquatic plants serving as aquatic vegetables is improved, the water quality is further purified, the peculiar smell of part of fish culture can be covered, the arrangement of the stepped ecological ditch can convert the gravitational potential energy of the flowing, filtering and culturing tail water into kinetic energy for other devices to use, and the filtering dam also has the functions of slowing down the water speed, prolonging the hydraulic retention time, and precipitating and removing particulate matters carried in the filtering and culturing tail water; meanwhile, nutrients obtained by filtering and degrading in each block can be recycled and reprocessed to realize dynamic migration of other nutrients, and the method for dynamically migrating symbiotic nutrients of rice and fishery disclosed by the invention maximizes the utilization of tail water of cultivation by batch utilization, promotes the problem solution and development in the technical development of the rice and fishery cultivation environment, and constructs the modern fishery with the advantages of energy conservation, emission reduction, high efficiency in output, safe product, resource conservation and environmental friendliness.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a recycling structure of aquaculture tail water according to the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Examples
In this embodiment, the intensive culture pond of functional area is built according to the rectangular shape, takes up 320 mu, and the ecological irrigation canals and ditches are built around the intensive culture pond, and the ecological irrigation canals and ditches take up 620 mu, are close to first filtration dam one side at the ecological irrigation canals and ditches and set up the total escape canal, and the total escape canal filters dam, biological purification pond, second way in proper order and filters dam and aquatic plant purification pond through first way, and total escape canal length is 1000 meters.
Example 1
(1) Arranging a filter tank in the ecological ditch, introducing the culture tail water into the filter tank, and taking the mixture of the water and the culture tail water according to the mass ratio of 100:1:2: 3:10, dehydrating, drying, crushing and granulating the culture tail water particles, ammonium nitrate, urea, biochar particles and potassium sulfate to prepare environment-friendly biogas manure, spreading the environment-friendly biogas manure in an ecological ditch, discharging the residual tail water into the ecological ditch, planting rice on the innermost side of a intensive culture pond surrounded by the ecological ditch to form a rice strip, wherein the width of the rice strip is 10m, 1 m of ranunculus japonicus, reed and hydrilla verticillata are alternately planted outside the rice strip, the intervals among the ranunculus japonicus, the reed and the hydrilla verticillata are 0.5m, and the culture tail water is precipitated and degraded in the ecological ditch for 2 days to obtain precipitated tail water;
(2) Leading the tail water precipitated in the step (1) to a first filtering dam, building a main box body frame of the filtering dam in an inverted trapezoid shape, and filling coarse gravel, ceramsite, coal slag and adsorption medium biochar into the main box body frame, wherein the mass ratio of the coarse gravel, the ceramsite, the coal slag and the biochar is 2:1:1:1, adjusting the width of an upper opening of a filtering dam to be 2 meters, and adsorbing and filtering primarily purified tail water through the filtering dam to obtain filtered and precipitated tail water;
(3) And (3) discharging the filtered and precipitated tail water obtained in the step (2) into a biological purification tank, and adding a raw material with the mass ratio of 1:1, the total adding amount of the bacillus preparation and the photosynthetic bacteria preparation is 800g/t, and microbial decomposition tail water is obtained after 2 days of microbial decomposition and precipitation;
(4) Introducing the microbial decomposition tail water obtained in the step (3) into a second filtering dam, and filtering and adsorbing particles by the filtering dam again to obtain filtered microbial decomposition tail water;
(5) Introducing the filtered microorganism tail water obtained in the step (4) into an aquatic plant clean water tank, fully planting tape grass, goldfish algae and cress in the aquatic plant clean water tank, wherein the intervals among the tape grass, the Goldfish algae and the cress are all 0.5m, and obtaining reusable tail water after the aquatic plant absorbs, decomposes and purifies the water for 2 days;
(6) And (4) arranging a water suction pump at a water outlet of the aquatic plant water cleaning pond, pumping the recyclable tail water in the step (5) into the water inlet ditch, shunting the water inlet ditch, and conveying the shunted water to each intensive culture pond for recycling.
Example 2
(1) Arranging a filter tank in the ecological ditch, introducing the culture tail water into the filter tank, and taking the mixture of the water and the culture tail water according to the mass ratio of 100:1:2: 3:10, dehydrating, drying, crushing and granulating the culture tail water particles, ammonium nitrate, urea, biochar particles and potassium sulfate to prepare environment-friendly biogas manure, spreading the environment-friendly biogas manure in an ecological ditch, discharging the residual tail water into the ecological ditch, planting rice on the innermost side of a intensive culture pond surrounded by the ecological ditch to form a rice strip, wherein the width of the rice strip is 10m, 1 m of buttercup, reed and hydrilla are alternately planted outside the rice strip, the intervals among the buttercup, the reed and the hydrilla are 0.5m, and the culture tail water is precipitated and degraded in the ecological ditch for 3 days to obtain precipitated tail water;
(2) Leading the tail water precipitated in the step (1) to a first filtering dam, building a main box body frame of the filtering dam in an inverted trapezoid shape, and filling coarse gravel, ceramsite, coal slag and adsorption medium biochar into the filtering dam, wherein the mass ratio of the coarse gravel, the ceramsite, the coal slag and the biochar is 2:1:1:1, adjusting the width of an upper opening of a filtering dam to be 2.25 meters, and adsorbing and filtering the primarily purified tail water through the filtering dam to obtain filtered and precipitated tail water;
(3) And (3) discharging the filtered and precipitated tail water obtained in the step (2) into a biological purification tank, and adding a raw material with the mass ratio of 1:1, the total adding amount of the bacillus preparation and the photosynthetic bacteria preparation is 800g/t, and microbial decomposition tail water is obtained after 3 days of microbial decomposition and precipitation;
(4) Introducing the microbial decomposition tail water obtained in the step (3) into a second filtering dam, and filtering and adsorbing particles by the filtering dam again to obtain filtered microbial decomposition tail water;
(5) Introducing the filtered microorganism tail water obtained in the step (4) into an aquatic plant clean water tank, fully planting tape grass, goldfish algae and cress in the aquatic plant clean water tank, wherein the intervals among the tape grass, the Goldfish algae and the cress are all 0.5m, and obtaining reusable tail water after the aquatic plant absorbs, decomposes and purifies water for 3 days;
(6) And (4) arranging a water suction pump at a water outlet of the water cleaning pool for the aquatic plants, pumping the tail water which can be reused in the step (5) into the water inlet ditch, and conveying the water into each intensive culture pond for reuse after the water inlet ditch is divided.
Example 3
(1) Arranging a filter tank in the ecological ditch, introducing the culture tail water into the filter tank, and taking the mixture of the water and the culture tail water according to the mass ratio of 100:1:2: 3:10, dehydrating, drying, crushing and granulating the culture tail water particles, ammonium nitrate, urea, charcoal particles and potassium sulfate to prepare environment-friendly biogas manure, spreading the environment-friendly biogas manure in an ecological ditch, discharging the rest tail water into the ecological ditch, planting rice on the innermost side of a intensive culture pond surrounded by the ecological ditch to form a rice zone, wherein the width of the rice zone is 10m, 1 m of ranunculus japonicus, reed and hydrilla verticillata are alternately planted outside the rice zone, 0.5m of the interval between ranunculus japonicus, reed and hydrilla verticillata is uniformly planted, and the culture tail water is precipitated and degraded in the ecological ditch for 5 days to obtain precipitated tail water;
(2) Leading the tail water precipitated in the step (1) to a first filtering dam, building a main box body frame of the filtering dam in an inverted trapezoid shape, and filling coarse gravel, ceramsite, coal slag and adsorption medium biochar into the main box body frame, wherein the mass ratio of the coarse gravel, the ceramsite, the coal slag and the biochar is 2:1:1:1, adjusting the width of an upper opening of a filtering dam to be 2.5 meters, and adsorbing and filtering the primarily purified tail water through the filtering dam to obtain filtered and precipitated tail water;
(3) And (3) discharging the tail water filtered and precipitated in the step (2) into a biological purification tank, and adding a raw material with the mass ratio of 1:1, the total adding amount of the bacillus preparation and the photosynthetic bacteria preparation is 800g/t, and microbial decomposition tail water is obtained after 5 days of microbial decomposition and precipitation;
(4) Introducing the microbial decomposition tail water obtained in the step (3) into a second filtering dam, and filtering adsorbed particles by the filtering dam again to obtain filtered microbial decomposition tail water;
(5) Introducing the filtered microorganism tail water obtained in the step (4) into an aquatic plant clean water tank, fully planting tape grass, goldfish algae and cress in the aquatic plant clean water tank, wherein the intervals among the tape grass, the Goldfish algae and the cress are all 0.5m, and obtaining reusable tail water after the aquatic plant absorbs, decomposes and purifies water for 5 days;
(6) And (4) arranging a water suction pump at a water outlet of the aquatic plant water cleaning pond, pumping the recyclable tail water in the step (5) into the water inlet ditch, shunting the water inlet ditch, and conveying the shunted water to each intensive culture pond for recycling.
Example 4
(1) The method comprises the following steps of (1) reclaiming a fertile piece of soil as a test field, planting paddy rice in the test field, and uniformly dividing the test field into two pieces;
(2) Weighing the environment-friendly biogas fertilizer, uniformly spreading the environment-friendly biogas fertilizer in a first test field after 30 days, and measuring the growth height of the rice in the first test field before spreading;
(3) Measuring the height of the rice in the first test field respectively at 15 days, 30 days and 60 days after the application, observing the growth vigor of the rice and recording;
(4) And (4) after the test is finished, taking the paddy field water in the first test field, and detecting the content of nitrogen and phosphorus in the water.
Comparative example 1
Comparative example 1 was used as a control group, and the parameters were changed to determine whether or not the environment-friendly biogas manure was recovered.
(1) Arranging ecological channels around the intensive culture pond, planting rice in 10m of the ecological channels, planting submerged plants and emergent plants at the periphery at intervals of 0.5m, discharging culture tail water into the ecological channels, and performing precipitation degradation on the culture tail water in the ecological channels for 2 days to obtain precipitation tail water;
(2) Leading the tail water precipitated in the step (1) to a first filtering dam, building a main box body frame of the filtering dam in a trapezoidal shape, filling adsorbing substances into the frame, adjusting the width of an upper opening of the filtering dam to be 2 m, and adsorbing and filtering the primarily purified tail water through the filtering dam to obtain filtered and precipitated tail water;
(3) Discharging the filtered and precipitated tail water obtained in the step (2) into a biological purification tank, adding a microbial preparation bacillus preparation, a photosynthetic bacteria preparation, lactic acid bacteria and an EM microbial agent into the biological purification tank, and decomposing and precipitating the microorganisms for 2 days to obtain microbial decomposed tail water;
(4) Introducing the microbial decomposition tail water obtained in the step (3) into a second filtering dam, and filtering and adsorbing particles by the filtering dam again to obtain filtered microbial decomposition tail water;
(5) Introducing the filtered microorganism tail water in the step (4) into a clean water pool of aquatic plants, planting emergent aquatic plants and submerged plants in the clean water pool of aquatic plants, and obtaining reusable tail water after the aquatic plants absorb, decompose and purify the water for 2 days;
(6) And (4) arranging a water suction pump at a water outlet of the water cleaning pool for the aquatic plants, pumping the tail water which can be reused in the step (5) into the water inlet ditch, and conveying the water into each intensive culture pond for reuse after the water inlet ditch is divided.
Comparative example 2
Comparative example 2 the comparative example 4 was used as a control group, and the parameters were changed to be different from those of the fertilizer, in this comparative example, the content of nitrogen fertilizer, the content of phosphate fertilizer and the content of potassium fertilizer in the ordinary chemical fertilizer were 30%, 15% and 50%.
(1) The method comprises the following steps of (1) reclaiming a fertile piece of soil as a test field, planting paddy rice in the test field, and uniformly dividing the test field into two pieces;
(2) Weighing common chemical fertilizer with the same mass as the environment-friendly biogas fertilizer, uniformly spreading the common chemical fertilizer in a second test field after 30 days, and measuring the growth height of the rice in the second test field before spreading;
(3) Measuring the height of the rice in a second test field respectively at 15 days, 30 days and 60 days after the application, observing the growth vigor of the rice and recording;
(4) And (4) after the test is finished, taking the paddy field water in the second test field, and detecting the content of nitrogen and phosphorus in the water.
Through comparison between examples 1-3 and comparative example 1, it can be observed that in examples 1-3, the growth speed of the plants in the ecological ditch is high, the cleaning times of the filter dam are low, and the water quality in the water inlet ditch is clear and has no peculiar smell; in the comparative example, the culture tail water discharged into the ecological ditch contains more particulate matters deposited on the roots of plants, the culture tail water has slow fluidity, the cleaning times of the filtering dam are more, and the water yield in the water inlet ditch is lower than that in the examples 1-3; by comparing example 4 with comparative example 1, it can be observed that the growth rate of rice in the example and the comparative example are not much different, and the rice in example 4 grows more flourishing.
From the above examples 1 to 4 and comparative examples 1 to 2, the following conclusions can clearly be drawn: the culture tail water is filtered to obtain culture tail water particles and the culture tail water is filtered, the culture tail water particles are processed to prepare the environment-friendly biogas manure, waste is changed into valuable, the effect on plantable land is the same as that of chemical fertilizers, and the planting and culture cost is saved; the filtered culture tail water treated by the filter tank and the three-pond two-dam system has excellent reusability, and the filtered culture tail water is used as secondary utilization circulating water in the three-pond two-dam treatment system, so that the growth of plants and the supplement of nutrient components are facilitated, the dynamic migration of nutrient substances is realized, water resources are saved, serious water pollution is avoided, the availability of the culture tail water in the rice and fishing symbiotic module is maximized, and the problem solution development in the technical development of the rice and fishing culture environment is promoted.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A rice and fish symbiotic nutrient substance dynamic migration breeding method is characterized in that: the culture method comprises the following steps:
(1) Discharging the culture tail water of the intensive culture pond to a filter tank through a water outlet, filtering by the filter tank to obtain culture tail water particles and filtered tail water, adding potassium sulfate, ammonium nitrate, urea and biochar particles into the culture tail water particles, mixing to prepare environment-friendly biogas manure, applying the environment-friendly biogas manure as a fertilizer to an ecological ditch, discharging the filtered tail water into the ecological ditch, and performing plant degradation and precipitation in the ecological ditch for 2-5 days to obtain precipitated tail water;
(2) Leading the precipitation tail water obtained in the step (1) to a first filtering dam, and performing adsorption filtration through the first filtering dam to obtain filtered precipitation tail water;
(3) Introducing the filtered and precipitated tail water obtained in the step (2) into a biological purification tank, and performing microbial decomposition and precipitation in the biological purification tank for 2-4 days to obtain microbial decomposition tail water;
(4) Introducing the microbial decomposition tail water obtained in the step (3) to a second filtering dam, and performing adsorption filtration through the second filtering dam to obtain filtered microbial decomposition tail water;
(5) Introducing the filtered microbial decomposition tail water obtained in the step (4) into a clean water pool of aquatic plants, and absorbing, decomposing and purifying the water for 2-5 days by the aquatic plants in the pool to obtain reusable tail water;
(6) Pumping the tail water which can be reused in the step (5) into the water inlet ditch by using a water suction pump, and conveying the split water to each intensive culture pond for reuse after the split water of the water inlet ditch.
2. The rice and fish symbiotic nutrient substance dynamic migration culture method according to claim 1, characterized in that: in the step (1), the environment-friendly biogas manure is solid, and the mass ratio of culture tail water particles, potassium sulfate, ammonium nitrate, urea and biochar particles is 100:1:2: (3-3.5): 10.
3. the rice and fish symbiotic nutrient substance dynamic migration culture method according to claim 1, characterized in that: the ecological ditch is seeded with rice, submerged plants and emergent aquatic plants.
4. The rice and fish symbiotic nutrient substance dynamic migration culture method according to claim 1, characterized in that: in the step (2) and the step (4), the filtering dam is of an inverted trapezoidal structure, the depth of the filtering dam is less than or equal to the maximum depth of the ecological ditch, and the width of an upper opening of the filtering dam is 2-2.5 meters.
5. The rice and fish symbiotic nutrient substance dynamic migration culture method according to claim 1, characterized in that: in the step (3), a microbial preparation is added into the biological purification tank, and the microbial preparation is one or more of a bacillus preparation, a photosynthetic bacteria preparation, lactic acid bacteria and an EM microbial agent.
6. The rice and fish symbiotic nutrient substance dynamic migration culture method according to claim 1, characterized in that: in the step (5), one or more of hygrophytes, emergent aquatic plants and submerged plants are planted in the aquatic plant clean water tank.
7. The dynamic migration cultivation method of symbiotic nutrients for rice and fishing as claimed in claim 2, wherein the method comprises the following steps: the biochar particles are prepared by burning straws in a carbonization furnace, and the environment-friendly biogas fertilizer is prepared by mixing culture tail water particles, ammonium nitrate, urea, biochar particles and potassium sulfate, dehydrating, drying, crushing and granulating.
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