The shrimp and crab polyculture method has the advantages of low investment, quick turnover, high efficiency, low risk, easy to grasp, etc. The specific operating techniques are as follows:
1. Pond Condition Pool pond area 3-5 acres. Two-layer anti-escape facilities are provided. The outside edge of the pool is covered with linoleum or calcium-plastic plate. The height is 55 cm to prevent rats and frogs. The pool edge is then re-used with a 0.8 mesh polyethylene net to form a fence. 120 cm, under the lining 60 cm high plastic cloth. Renovate the pond before putting it aside and clean up excess silt. The bottom of the pool is required to be flat and solid. In the second half of February, 100 kilograms of quick lime are used for disinfection per acre. About 20 centimeters of water is poured around February 20, and the water inlet is filtered with a 50-mesh sieve to prevent entry of predator organisms.
2. About 10% of the surface area of ​​the water surface was transplanted with submerged plants such as Hydrilla verticillata and Malay Oozi. Another put snail 300 kg/mu.
3. The seedlings were stocked with green prawns of 1.8-2.0 cm in size before and after the end of February and stocked 750-800 eggs per acre. On April 20th, about 3-4 young crabs were stocked and 750-800 mu were stocked.
4. Feeding management is based on the use of aquatic grasses and snails, mainly relying on artificial feeding. Early feeding of boiled small junk fish (mixed with wheat flour); mid-term feeding of chopped small junk fish with bran, corn, and wheat concentrates; followed by concentrates, with corn and wheat boiled and fed Add animal feed once every 7 days. 3.5-4 kilograms of refined material per day, about 3 kilograms of animal feed, depending on the remaining situation of the residual bait decided to change the amount of feed. Feeding was done in the shallow water of the pool and was fed at 6 pm every day.
5. Water quality management The initial water level in aquaculture is about 60 cm. When the water temperature reaches 20°C, the water level is adjusted to about 70 cm. When the water temperature reaches 25°C or more, the water level rises to about 1 meter. When the water temperature exceeds 30°C, the water level is controlled at about 1.5 meters. 2-3 days change: water once, each time the total amount of water for 1/3.
6. When the disease-prevention water temperature is 20-25°C, a 0.5x10-6 concentration of lime water is sprayed on the whole pond every 20 days, and every 10 days when 25°C is used, a 1x10-6 concentration of quicklime water is splashed on the whole pond. The pH of the pool water was maintained at 7.5-8.5, and the bait was periodically fed at the peak of the disease. 6 grams of oxytetracycline per kilogram of bait was used for 5-6 days as a course of treatment.
7. The fishing and fishing methods include cage net capture, shore capture and dry pool capture.
1. Pond Condition Pool pond area 3-5 acres. Two-layer anti-escape facilities are provided. The outside edge of the pool is covered with linoleum or calcium-plastic plate. The height is 55 cm to prevent rats and frogs. The pool edge is then re-used with a 0.8 mesh polyethylene net to form a fence. 120 cm, under the lining 60 cm high plastic cloth. Renovate the pond before putting it aside and clean up excess silt. The bottom of the pool is required to be flat and solid. In the second half of February, 100 kilograms of quick lime are used for disinfection per acre. About 20 centimeters of water is poured around February 20, and the water inlet is filtered with a 50-mesh sieve to prevent entry of predator organisms.
2. About 10% of the surface area of ​​the water surface was transplanted with submerged plants such as Hydrilla verticillata and Malay Oozi. Another put snail 300 kg/mu.
3. The seedlings were stocked with green prawns of 1.8-2.0 cm in size before and after the end of February and stocked 750-800 eggs per acre. On April 20th, about 3-4 young crabs were stocked and 750-800 mu were stocked.
4. Feeding management is based on the use of aquatic grasses and snails, mainly relying on artificial feeding. Early feeding of boiled small junk fish (mixed with wheat flour); mid-term feeding of chopped small junk fish with bran, corn, and wheat concentrates; followed by concentrates, with corn and wheat boiled and fed Add animal feed once every 7 days. 3.5-4 kilograms of refined material per day, about 3 kilograms of animal feed, depending on the remaining situation of the residual bait decided to change the amount of feed. Feeding was done in the shallow water of the pool and was fed at 6 pm every day.
5. Water quality management The initial water level in aquaculture is about 60 cm. When the water temperature reaches 20°C, the water level is adjusted to about 70 cm. When the water temperature reaches 25°C or more, the water level rises to about 1 meter. When the water temperature exceeds 30°C, the water level is controlled at about 1.5 meters. 2-3 days change: water once, each time the total amount of water for 1/3.
6. When the disease-prevention water temperature is 20-25°C, a 0.5x10-6 concentration of lime water is sprayed on the whole pond every 20 days, and every 10 days when 25°C is used, a 1x10-6 concentration of quicklime water is splashed on the whole pond. The pH of the pool water was maintained at 7.5-8.5, and the bait was periodically fed at the peak of the disease. 6 grams of oxytetracycline per kilogram of bait was used for 5-6 days as a course of treatment.
7. The fishing and fishing methods include cage net capture, shore capture and dry pool capture.