CN106962246B - Cross seedling-throwing cultivation three-crop method for rice field crayfishes - Google Patents
Cross seedling-throwing cultivation three-crop method for rice field crayfishes Download PDFInfo
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- 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
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Abstract
The invention provides a method for cross seedling feeding and breeding of crayfishes in a rice field, which comprises the following steps: (1) transforming a low-lying rice field into a deep water area and a shallow water area, harvesting the rice 11 months before until the bottom of 3 months in the current year, and draining the stored water in the rice field; then, carrying out aquatic weed planting in the shallow water area to form an aquatic weed area; (2) conducting water and irrigating the field to ensure that the water depth of the deep water area is more than 1.5 meters and the water depth of the shallow water area is less than 0.6 meter; starting in the early 4 months, temporarily culturing crayfish seedlings by arranging net cages in a deep water area, and carrying out cross seedling feeding and cross seedling feeding to culture three crayfish crops; (3) and (3) classified feeding of feeds: feeding fry feed in the net cage, and feeding adult shrimp feed outside the net cage; the method fully utilizes the space and the water body of the rice field, improves the breeding survival rate of the crayfishes, improves the breeding yield of the crayfishes in unit area, and has great significance for improving the yield of the rice field in unit area and the economic benefit.
Description
Technical Field
The invention relates to the field of crayfish paddy field cultivation, in particular to a method for cross seedling feeding and cultivation of crayfish in a paddy field.
Background
The procambarus clarkii belongs to the class of the arthrobacteria, the class of crustaceans, the family of crayfishes and the genus of procambarus clarkii, is also named as crayfish, is known as procambarus clarkii (hereinafter collectively named as crayfish), has delicious meat taste and rich nutrition, is deeply loved by people, and is a main variety for culturing the shrimps at present. In recent years, due to the rapid increase of market demand, the natural resources of crayfishes are rapidly reduced, and the price is gradually increased, so that the market demand is met through artificial scientific culture. The crayfish paddy field breeding is rapidly developed, and due to the unique biological characteristics of the survival and growth of the crayfish, the yield per unit of the crayfish bred in the paddy field is generally not high, so that the demand of market consumers on high-quality commercial crayfish is far from being met; the method obtains the success of the three-crop cultivation of the crayfish in the rice field through continuous test exploration, can adopt the continuous rice field to carry out the cross seeding cultivation of the crayfish for three crops, and realizes the large-scale and batch production of the commercial crayfish of the crayfish.
Disclosure of Invention
The invention aims to provide a rice field crayfish cross-seeding three-crop cultivation method, which is characterized in that a rice field is scientifically processed to be transformed into a deep water area and a shallow water area, the rice field area is distributed in a mode of combining a 'water grass area' and a 'net cage area', and then cross seeding and stubble arrangement, feed classified feeding and the like are carried out to fully utilize the space and the water body of the rice field, improve the crayfish cultivation survival rate, improve the cultivation yield of crayfish in unit area and have great significance for improving the yield of the rice field in unit area and economic benefit.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a rice field crayfish cross seedling raising and three-crop cultivation method comprises the following steps:
(1) transforming a low-lying rice field into a deep water area and a shallow water area, wherein the deep water area accounts for 15-20% of the area of the rice field, the shallow water area accounts for 80-85% of the area of the rice field, harvesting the rice in the previous 11 months until the bottom of the current 3 months, and draining the stored water in the rice field; then, carrying out aquatic weed planting in the shallow water area to form an aquatic weed area;
(2) conducting water and irrigating the field to ensure that the water depth of the deep water area is more than 1.5 meters and the water depth of the shallow water area is less than 0.6 meter; beginning in 4 months in the year, setting net cages in deep water areas to temporarily culture crayfish fries, and arranging the cross seeding and stubble openings as follows:
① putting the first crayfish in the aquatic weed area 4-month-5-10-day in the year, catching the crayfish in 4-month-5-30-month-5, putting the crayfish in the water area;
② 5 putting a second batch of shrimp seeds into the net cage of the first net cage area at the same time from 20 to 30 months after 5 days, temporarily culturing for 10 days, removing the net cage of the first net cage area after the first batch of cultured crayfish is caught, and allowing the crayfish to enter a pasture and water area for foraging and growing;
③ 6 putting a third batch of shrimp larvae into the net cage in the second net cage area at 20-30 days in the month of 6, and temporarily culturing for 10 days;
④ 6 transplanting seedlings in the original shallow water aquatic plant area from 29 to 30 days in the month of 6, and replanting goldfish algae and hydrilla verticillata in the deep water area;
⑤ removing the net cage in the second net cage area after the second batch of cultured crayfishes are caught and the rice seedlings are transplanted, allowing the crayfishes to enter the deep water grasses area and the rice planting area of the rice field for foraging and deinsectizing, catching the third batch of cultured crayfishes in 6 months in 9-10 months, draining water in 11 months and drying the field in the sun, and harvesting the rice;
(3) and (3) classified feeding of feeds: feeding the fry feed in the net cage, and feeding the adult shrimp feed outside the net cage.
Preferably, the ① of the step (2) includes that the number of the first crayfish fries thrown into the aquatic weed area from 4 months and 5 days to 10 days is 6000 tails/mu and the specification is 200 tails/kg, the number of the second crayfish fries thrown into the first net cage area from 5 months and 20 days to 30 days in ② is 4000 tails/mu and the specification is 160 tails/kg, and the number of the third crayfish fries thrown into the second net cage area from 6 months and 20 days to 30 days in ③ is 6200 tails/mu and the specification is 160 tails/kg.
Preferably, in the step (2), the first net cage area accounts for 6-8% of the total area of the rice field, and the second net cage area accounts for 9-12% of the total area of the rice field.
Preferably, the sizes of the net cages placed in the first net cage area and the second net cage area are both 2 multiplied by 4 multiplied by 0.8 m, and the distance between the bottoms of the net cages and the bottom of the rice field is more than 20 cm.
Preferably, the rice field is a smooth rectangular rice field with good ecological environment and no pollution source, and the length-width ratio of the rice field is 2: 1.
preferably, the area of each paddy field is 10 mu.
The invention has the beneficial effects that:
1. the invention scientifically treats the rice field, and after the rice field is exposed to sunlight, pathogens in bottom mud are killed, and the soil structure is improved.
2. The transformation of the deep water area and the shallow water area of the rice field creates the conditions for cultivating three crops of crayfish and planting one crop of rice in the rice field; the 'water grass area' and the 'net cage area' are combined in the rice field area, and crayfish seedlings and adult shrimps can simultaneously survive and grow in the same rice field within a certain period of time through the technical measure of space-time separation.
3. The arrangement of cross seedling throwing and stubble crops in the invention fully utilizes the space and water body of the rice field, improves the breeding survival rate of the crayfishes, improves the breeding yield of the crayfishes in unit area, and has great significance for improving the yield of the rice field in unit area and economic benefit.
4. The invention feeds the crayfish fries and adult crayfish in different categories, so that the crayfish fries and adult crayfish compartments are required.
Drawings
FIG. 1 is a schematic view showing the layout of "grass-growing area" and "box area" in the paddy field area of the present invention.
In the figure: 1. a float grass area; 2. a net cage area; 201. a first net cage area; 202. and a second net cage area.
Detailed Description
The technical solution of the invention is further illustrated below with reference to specific examples, which are not to be construed as limiting the technical solution.
Example 1:
selecting 3 flat rectangular rice fields with good ecological environment and no pollution source from county, wherein the length-width ratio of the rice fields is 2: 1, each paddy field is about 10 mu;
(1) modifying the rice field into a deep water area and a shallow water area according to the original features and the terrain of the low-lying rice field, wherein the area of the deep water area is 1.5-2 mu, the area of the shallow water area is 8-8.5 mu, the water stored in the rice field is drained after the rice is harvested 11 months in the previous year to 3 months in the current year, the water is completely exposed to the sun, pathogens at the bottom of the rice field are killed, the structure of soil is changed, and the survival and the growth of crayfishes are facilitated; after the water is stored and drained (3 months at the bottom), aquatic weeds are planted in the shallow water area to form an aquatic weed area;
(2) conducting water and irrigating the field, wherein the water depth of the deep water area is more than 1.5 meters, and the water depth of the shallow water area is less than 0.6 meter; and (2) temporarily culturing crayfish seedlings by using net cages in the deep water area beginning at the beginning of 4 months in the year, wherein the deep water area is a net cage area, the net cage area is divided into a first net cage area and a second net cage area, the area of the first net cage area is 0.6-0.8 mu, 20 net cages with the size of 2 x 4 x 0.8 m are arranged in the first net cage area, the area of the second net cage area is 0.9-1.2 mu, and 30 net cages with the size of 2 x 4 x 0.8 m are arranged in the second net cage area. The distance between the bottoms of the net cages in the first net cage area and the second net cage area is more than 20 cm from the bottom of the rice field.
The arrangement of cross seedling throwing and stubble opening is as follows:
① putting the first crayfish in the water weed area in the amount of 6000 crayfish seeds/mu, 30 kg/mu and 200 crayfish seeds/kg in the specification from 4 months and 5 days to 10 days of the year;
catching crayfish which is thrown and cultured in 4 months from 20 days to 30 days in 5 months, wherein the crayfish is 115 kg/mu, the average specification is 6 cash/tail, and the number is 3840 tails;
② 5 putting a second batch of shrimp seeds into the net cages of the first net cage area at the same time of 20-30 days in month, wherein the number of the second batch of shrimp seeds is 4000 tails/mu, 25 kg/mu and the specification of the second batch of shrimp seeds is 160 tails/kg, and temporarily culturing the second batch of shrimp seeds in the net cages for 10 days;
catching the crayfishes which are bred in 5 months from 20 days to 28 days in 6 months, wherein the crayfishes are 75 kg/mu, 6 coins/tail in average specification and 2500 tails in number;
③ 6 putting a third batch of shrimp seeds into the net cage of the second net cage area at the same time from 20 days to 30 days in the month of 6, wherein the number of the third batch of shrimp seeds is 6200 tails/mu, 39 kilograms/mu and the specification of the third batch of shrimp seeds is 160 tails/kilogram, and temporarily culturing the third batch of shrimp seeds in the net cage for 10 days;
④ 60 transplanting seedlings in the original shallow water aquatic area (the residual quantity of aquatic plants in the shallow water area is very small through the second-crop crayfish cultivation, and rice can be planted without treatment) in 29-30 days after the month of ④, and replanting goldfish algae and hydrilla verticillata in the deep water area;
⑤ removing the net cage in the second net cage area after the second batch of cultured crayfishes are caught and the rice seedlings are transplanted, and allowing the crayfishes to enter the deep-water weed area and the rice planting area of the rice field for foraging and deinsectizing;
catching a third batch of crayfish which is thrown and cultured in 6 months in 9-10 months, wherein the yield is 114 kg/mu, the specification is 6 cash/tail, and the quantity is 3800 tail; and (5) discharging water for drying the field in the sun in 11 months, and harvesting the rice.
(3) And (3) classified feeding of feeds: feeding the fry feed in the net cage, and feeding the adult shrimp feed outside the net cage.
(4) The total yield of the three cultivated stubbles is as follows: the first crop yield is 115 kg/mu, the second crop yield is 75 kg/mu, the third crop yield is 114 kg/mu, and the total yield is 304 kg/mu.
Comparative example 1:
selecting 3 flat rectangular rice fields with good ecological environment and no pollution source from county, wherein the length-width ratio of the rice fields is 2: 1, each paddy field is about 10 mu;
putting crayfish seedlings in the paddy field in 4 months of the year, wherein the number of the crayfish seedlings is 8000 per mu, 30 kg per mu and the specification of the crayfish seedlings is 200 per kg; the crayfish is caught in the first ten days of 6 months, the yield is 105 kg/mu, the average specification is 6 cash/tail, and the number is 3500 tail.
Example 2:
selecting 3 smooth rectangular rice fields with good ecological environment and no pollution sources in the Huaining area, wherein the length-width ratio of the rice fields is 2: 1, each paddy field is about 10 mu;
(1) modifying the rice field into a deep water area and a shallow water area according to the original features and the terrain of the low-lying rice field, wherein the area of the deep water area is 1.5-2 mu, the area of the shallow water area is 8-8.5 mu, the water stored in the rice field is drained after the rice is harvested 11 months in the previous year to 3 months in the current year, the water is completely exposed to the sun, pathogens at the bottom of the rice field are killed, the structure of soil is changed, and the survival and the growth of crayfishes are facilitated; after the water is drained (3 months at the bottom), aquatic weeds are planted in the shallow water area to form an aquatic weed area.
(2) Conducting water and irrigating the field, wherein the water depth of the deep water area is more than 1.5 meters, and the water depth of the shallow water area is less than 0.6 meter; and (2) temporarily culturing crayfish seedlings by using net cages in a deep water area beginning at the beginning of 4 months in the year, wherein the deep water area is a net cage area, the net cage area is divided into a first net cage area and a second net cage area, the first net cage area and the second net cage area are arranged side by side, the area of the first net cage area is 0.6-0.8 mu, 20 net cages with the size of 2 multiplied by 4 multiplied by 0.8 are arranged in the first net cage area, the area of the second net cage area is 0.9-1.2 mu, and 30 net cages with the size of 2 multiplied by 4 multiplied by 0.8 are arranged in the second net. The distance between the bottoms of the net cages in the first net cage area and the second net cage area is more than 20 cm from the bottom of the rice field.
The arrangement of cross seedling throwing and stubble opening is as follows:
① putting the first crayfish in the water weed area in the amount of 6000 crayfish seeds/mu, 30 kg/mu and 200 crayfish seeds/kg in the specification from 4 months and 5 days to 10 days of the year;
catching crayfish which is cultured in 4 months, 102 kg/mu, 6 coins/tail in average specification and 3400 tails in 5 months, 20 days and 30 days;
② 5 putting a second batch of shrimp seeds into the net cages of the first net cage area at 20 days and 30 days in the month of 20, wherein the number of the second batch of shrimp seeds is 4000 tails/mu, 25 kg/mu and the specification of the second batch of shrimp seeds is 160 tails/kg, and temporarily culturing the second batch of shrimp seeds in the net cages for 10 days;
catching crayfish cultured in 5 months from 20 days to 28 days in 6 months, wherein the crayfish is 71 kg/mu, the average size is 6 cash/tail, and the number is 2370 tail;
③ 6, putting a third batch of shrimp seeds into the net cage of the second net cage area at 20 days and 30 days in the month, wherein the number of the third batch of shrimp seeds is 6200 per mu, 39 kg per mu and 160 tails per kg, and temporarily culturing the third batch of shrimp seeds in the net cage for 10 days;
④ 60 transplanting seedlings in the original shallow water aquatic area (the residual quantity of aquatic plants in the shallow water area is very small through the second-crop crayfish cultivation, and rice can be planted without treatment) in 29-30 days after the month of ④, and replanting goldfish algae and hydrilla verticillata in the deep water area;
⑤ removing the net cage in the second net cage area after the second batch of cultured crayfishes are caught and the rice seedlings are transplanted, and allowing the crayfishes to enter the deep-water weed area and the rice planting area of the rice field for foraging and deinsectizing;
catching a third batch of crayfish which is thrown and cultured in 6 months in 9-10 months, wherein the third batch of crayfish is 104 kg/mu, the size is 6 cash/tail, and the number is 3470 tails; and (5) discharging water for drying the field in the sun in 11 months, and harvesting the rice.
(3) And (3) classified feeding of feeds: feeding the fry feed in the net cage, and feeding the adult shrimp feed outside the net cage.
The total yield of the three cultivated stubbles is as follows: the first crop yield is 102 kg/mu, the second crop yield is 71 kg/mu, the third crop yield is 104 kg/mu, and the total yield is 277 kg/mu.
Comparative example 2:
selecting 3 blocks of Huanning smooth rectangular rice fields with good ecological environment and no pollution source, wherein the length-width ratio of the rice fields is 2: 1, each paddy field is about 10 mu;
putting crayfish seedlings in the paddy field in 4 months of the year, wherein the number of the crayfish seedlings is 8000 per mu, 30 kg per mu and the specification of the crayfish seedlings is 200 per kg; catching crayfish 102 kg/mu in the first ten days of 6 months, with average standard of 6 cash/tail and quantity of 3400 tail.
Example 3:
selecting 3 smooth rectangular rice fields with good ecological environment and no pollution sources in the whole pepper region, wherein the length-width ratio of the rice fields is 2: 1, each paddy field is about 10 mu;
(1) modifying the rice field into a deep water area and a shallow water area according to the original features and the terrain of the low-lying rice field, wherein the area of the deep water area is 1.5-2 mu, the area of the shallow water area is 8-8.5 mu, the water stored in the rice field is drained after the rice is harvested 11 months in the previous year to 3 months in the current year, the water is completely exposed to the sun, pathogens at the bottom of the rice field are killed, the structure of soil is changed, and the survival and the growth of crayfishes are facilitated; after the water is drained (3 months at the bottom), aquatic weeds are planted in the shallow water area to form an aquatic weed area.
(2) Conducting water and irrigating the field, wherein the water depth of the deep water area is more than 1.5 meters, and the water depth of the shallow water area is less than 0.6 meter; and (2) temporarily culturing crayfish seedlings by using net cages in the deep water area beginning at the beginning of 4 months in the year, wherein the deep water area is a net cage area, the net cage area is divided into a first net cage area and a second net cage area, the area of the first net cage area is 0.6-0.8 mu, 20 net cages with the size of 2 x 4 x 0.8 m are arranged in the first net cage area, the area of the second net cage area is 0.9-1.2 mu, and 30 net cages with the size of 2 x 4 x 0.8 m are arranged in the second net cage area. The distance between the bottoms of the net cages in the first net cage area and the second net cage area is more than 20 cm from the bottom of the rice field.
The arrangement of cross seedling throwing and stubble opening is as follows:
① putting the first crayfish in the water weed area in the amount of 6000 crayfish seeds/mu, 30 kg/mu and 200 crayfish seeds/kg in the specification from 4 months and 5 days to 10 days of the year;
catching the crayfishes which are bred in 4 months in 5 months, 20 days and 30 days, wherein 118 kg/mu of the crayfishes are bred, the average specification is 6 cash/tail, and the number is 3940 tails;
② 5 putting a second batch of shrimp seeds into the net cages of the first net cage area at the same time of 20-30 days in month, wherein the number of the second batch of shrimp seeds is 4000 tails/mu, 25 kg/mu and the specification of the second batch of shrimp seeds is 160 tails/kg, and temporarily culturing the second batch of shrimp seeds in the net cages for 10 days;
catching the crayfishes which are bred in 5 months from 20 days to 28 days in 6 months, wherein the crayfishes are 81 kg/mu, the average size is 6 cash/tail, and the number is 2700;
③ 6 putting a third batch of shrimp seeds into the net cage of the second net cage area at the same time from 20 days to 30 days in the month of 6, wherein the number of the third batch of shrimp seeds is 6200 tails/mu, 39 kilograms/mu and the specification of the third batch of shrimp seeds is 160 tails/kilogram, and temporarily culturing the third batch of shrimp seeds in the net cage for 10 days;
④ 60 transplanting seedlings in the original shallow water aquatic area (the residual quantity of aquatic plants in the shallow water area is very small through the second-crop crayfish cultivation, and rice can be planted without treatment) in 29-30 days after the month of ④, and replanting goldfish algae and hydrilla verticillata in the deep water area;
⑤ removing the net cage in the second net cage area after the second batch of cultured crayfishes are caught and the rice seedlings are transplanted, and allowing the crayfishes to enter the deep-water weed area and the rice planting area of the rice field for foraging and deinsectizing;
catching a third batch of crayfish which is thrown and cultured in 6 months in 9-10 months, wherein the crayfish is 121 kg/mu, 6 coins/tail in specification and 4040 tails in quantity; and (5) discharging water for drying the field in the sun in 11 months, and harvesting the rice.
(3) And (3) classified feeding of feeds: feeding the fry feed in the net cage, and feeding the adult shrimp feed outside the net cage.
The total yield of the three cultivated stubbles is as follows: the first crop yield is 118 kg/mu, the second crop yield is 81 kg/mu, the third crop yield is 121 kg/mu, and the total yield is 320 kg/mu.
Comparative example 3:
selecting 3 pieces of flat rectangular rice fields with good ecological environment and no pollution source from the whole peppers, wherein the length-width ratio of the rice fields is 2: 1, each paddy field is about 10 mu;
putting crayfish seedlings in the paddy field in 4 months of the year, wherein the number of the crayfish seedlings is 8000 per mu, 30 kg per mu and the specification of the crayfish seedlings is 200 per kg; the crayfish is harvested in the first ten days of 6 months, 110 kg/mu, 6 coins/tail in average specification and 3670 tails in quantity.
The following table is a table comparing the production of examples 1-3 with comparative examples 1-3, and the specific data are shown in table 1:
TABLE 1 comparison of yields
As can be seen from Table 1, the yield of the crayfishes cultured by the method is obviously higher than that of the control example, and the commercial crayfishes can be produced in large scale and in batch by adopting the continuous rice field of the invention to carry out the cross seedling raising and breeding of the crayfishes for three times.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, including any reference to the above-mentioned embodiments. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A rice field crayfish cross seedling raising and three-crop cultivation method is characterized by comprising the following steps:
(1) transforming a low-lying rice field into a deep water area and a shallow water area, wherein the deep water area accounts for 15-20% of the area of the rice field, the shallow water area accounts for 80-85% of the area of the rice field, harvesting the rice in the previous 11 months until the bottom of the current 3 months, and draining the stored water in the rice field; then, carrying out aquatic weed planting in the shallow water area to form an aquatic weed area;
(2) conducting water and irrigating the field to ensure that the water depth of the deep water area is more than 1.5 meters and the water depth of the shallow water area is less than 0.6 meter; beginning in 4 months in the year, setting net cages in deep water areas to temporarily culture crayfish fries, and arranging the cross seeding and stubble openings as follows:
① putting the first crayfish in the aquatic weed area 4-month-5-10-day in the year, catching the crayfish in 4-month-5-30-month-5, putting the crayfish in the water area;
② 5 putting a second batch of shrimp seeds into the net cage of the first net cage area at the same time from 20 to 30 months after 5 days, temporarily culturing for 10 days, removing the net cage of the first net cage area after the first batch of cultured crayfish is caught, and allowing the crayfish to enter a pasture and water area for foraging and growing;
③ 6 putting a third batch of shrimp larvae into the net cage in the second net cage area at 20-30 days in the month of 6, and temporarily culturing for 10 days;
④ 6 transplanting seedlings in the original shallow water aquatic plant area from 29 to 30 days in the month of 6, and replanting goldfish algae and hydrilla verticillata in the deep water area;
⑤ removing the net cage in the second net cage area after the second batch of cultured crayfishes are caught and the rice seedlings are transplanted, allowing the crayfishes to enter the deep water grasses area and the rice planting area of the rice field for foraging and deinsectizing, catching the third batch of cultured crayfishes in 6 months in 9-10 months, draining water in 11 months and drying the field in the sun, and harvesting the rice;
(3) and (3) classified feeding of feeds: feeding the fry feed in the net cage, and feeding the adult shrimp feed outside the net cage.
2. The method for cultivating the rice field crayfish in the three crops by crosswise throwing the crayfish to the water plant area for three times according to the claim 1, wherein the number of the first crayfish fries thrown into the water plant area for 4-month 5-10 days in ① of the step (2) is 6000 tails/mu and the specification is 200 tails/kg, the number of the second crayfish fries thrown into the first net cage area for 5-month 20-30 days in ② is 4000 tails/mu and the specification is 160 tails/kg, and the number of the third crayfish fries thrown into the second net cage area for 6-month 20-30 days in ③ is 6200 tails/mu and the specification is 160 tails/kg.
3. The method for cross-seeding and cultivating the crayfishes in the field according to claim 1, wherein in the step (2), the first net cage area accounts for 6-8% of the total area of the field, and the second net cage area accounts for 9-12% of the total area of the field.
4. The method for cross-seeding and cultivating the paddy field crayfishes and the crayfishes as claimed in claim 3, wherein the size of the net cages placed in the first net cage area and the second net cage area is 2 x 4 x 0.8 m, and the distance between the bottoms of the net cages and the bottom of the paddy field is more than 20 cm.
5. The method for cross-seeding and cultivating the crayfishes in the paddy field as claimed in claim 1, wherein the paddy field is a flat rectangular paddy field with good ecological environment and no pollution source, and the length-width ratio of the paddy field to the crayfish is 2: 1.
6. the method for cross-seeding and cultivating the crayfishes in the paddy field according to claim 1, wherein the area of the paddy field is 10 mu.
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| CN201710203224.6A CN106962246B (en) | 2017-03-30 | 2017-03-30 | Cross seedling-throwing cultivation three-crop method for rice field crayfishes |
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| CN201710203224.6A CN106962246B (en) | 2017-03-30 | 2017-03-30 | Cross seedling-throwing cultivation three-crop method for rice field crayfishes |
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| CN107372228A (en) * | 2017-09-08 | 2017-11-24 | 王辉 | A kind of loach and the polyculture method of freshwater crayfish |
| CN107950435B (en) * | 2017-11-20 | 2021-02-09 | 江苏省农业科学院宿迁农科所 | Method for combining runway type weever breeding with paddy field intercropping crayfish |
| CN108522178A (en) * | 2018-03-14 | 2018-09-14 | 和县明信水产养殖专业合作社 | A kind of rice field cray intersection throwing seedling three batches of methods of cultivation |
| CN110367161A (en) * | 2019-08-23 | 2019-10-25 | 上海海洋大学 | A kind of big specification breeding selection of cray |
| CN111758632B (en) * | 2020-07-14 | 2022-03-01 | 和县明信水产养殖专业合作社 | Method for breeding and raising rice field crayfish in early autumn |
| CN112438224B (en) * | 2020-12-21 | 2022-03-25 | 通威股份有限公司 | Cultivation method and cultivation pond for cultivating and separating crayfishes in five crops in one year |
| CN113080117A (en) * | 2021-03-16 | 2021-07-09 | 安徽省农业科学院水产研究所 | Method for breeding three-crop procambarus clarkii in rice field |
| CN114946723B (en) * | 2022-05-23 | 2023-05-05 | 河南师范大学 | Pond intensive culture method for procambarus clarkia |
| CN115119795B (en) * | 2022-07-27 | 2023-06-27 | 广东广深农业科技发展有限公司 | Crayfish culture system and culture method |
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