Self-breeding and self-cultivation techniques for crab species
2018-04-17 14:00:17
Self-breeding and self-cultivation crab species not only saves costs, but also has good adaptability for crab species, and lays a solid foundation for developing large-size crabs. In recent years, we have adhered to the self-breeding crab species. After intensive breeding for 6 months, the larval larvae usually produce 40,000 dungling crabs per kilogram with a specification of 160 per kilogram. Our main approach is:
First, pond selection. Choose a pond that is near the unpolluted water source, has convenient drainage and drainage, and has a convenient transportation. It is a pond with a long east-west direction and a short north-south direction. The area is 3 mu each, 1.2 meters deep, and the soil is suitable for clay loam.
Second, stocking preparation. (1) Clear pond disinfection. Fresh water was injected one month before the planting, and 125 kg of lime was used for disinfection per acre. (2) Set water plants. With a plastic rope along the edge of the pond to put water plants, aquatic plants account for 1/3 of the pool. (3) Fertilize water. Put 20 centimeters of new water 10 days before seedlings, apply 2.5 kg of calcium phosphate, 0.5 kg of urea, and 100 kg of organic fertilizer (pig excrement, chicken manure, and quicklime) after decomposed fermentation. (4) Add new water. Fill the filtered fresh water before laying the seedlings so that the cultivation tank is 40 cm deep.
Third, crab stocking. Stocking density is 0.75 kg per mu. When releasing the seedlings, first place the crab seedlings box on the pool bowl, and pour the pool water. Then put the box into the pond and tilt it so that the crab seedlings can slowly and automatically walk away.
Fourth, nurture management. After the crab seedlings were unloaded, the fish was fed with a daily dose of 100% crab weight. The fish was injected once every 2 hours until IV crabs appeared. The daily amount was changed to 50% of the crab weight, divided into 2 shots. Hey, you have changed to V period. After that, the amount was reduced to 20% of the body weight of the crab and fed with duckweed.
Fifth, water quality regulation. When the crabs are in the pond, the water depth is maintained at about 60 cm. The newly filtered water is gradually added on the 4th day so that the water depth is 1 meter and then the water is replaced. The water is firstly discharged, and the daily water exchange rate is 1/4 of the cultivated pool water. Sprinkle lime water for 5 days to maintain the pH at around 8.
First, pond selection. Choose a pond that is near the unpolluted water source, has convenient drainage and drainage, and has a convenient transportation. It is a pond with a long east-west direction and a short north-south direction. The area is 3 mu each, 1.2 meters deep, and the soil is suitable for clay loam.
Second, stocking preparation. (1) Clear pond disinfection. Fresh water was injected one month before the planting, and 125 kg of lime was used for disinfection per acre. (2) Set water plants. With a plastic rope along the edge of the pond to put water plants, aquatic plants account for 1/3 of the pool. (3) Fertilize water. Put 20 centimeters of new water 10 days before seedlings, apply 2.5 kg of calcium phosphate, 0.5 kg of urea, and 100 kg of organic fertilizer (pig excrement, chicken manure, and quicklime) after decomposed fermentation. (4) Add new water. Fill the filtered fresh water before laying the seedlings so that the cultivation tank is 40 cm deep.
Third, crab stocking. Stocking density is 0.75 kg per mu. When releasing the seedlings, first place the crab seedlings box on the pool bowl, and pour the pool water. Then put the box into the pond and tilt it so that the crab seedlings can slowly and automatically walk away.
Fourth, nurture management. After the crab seedlings were unloaded, the fish was fed with a daily dose of 100% crab weight. The fish was injected once every 2 hours until IV crabs appeared. The daily amount was changed to 50% of the crab weight, divided into 2 shots. Hey, you have changed to V period. After that, the amount was reduced to 20% of the body weight of the crab and fed with duckweed.
Fifth, water quality regulation. When the crabs are in the pond, the water depth is maintained at about 60 cm. The newly filtered water is gradually added on the 4th day so that the water depth is 1 meter and then the water is replaced. The water is firstly discharged, and the daily water exchange rate is 1/4 of the cultivated pool water. Sprinkle lime water for 5 days to maintain the pH at around 8.