Self-breeding and self-fertilizing crab species not only saves costs, but also has good adaptability to 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 160,000 dungeons per kilogram with a capacity of 40,000 eggs per kilogram. Our main approach is:
I. Pond Selection We should choose a pond with a long east-west direction and a short north-south direction near a non-polluted water source, convenient drainage and drainage, and convenient transportation. 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, the crab stocking stocking density of 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, rearing and management in the crab pond, feed the fish, the daily amount of 100% crab weight, every 2 hours to vote until the IV phase of crab, the amount of daily changes to 50% of crab weight, Feed it in 2 doses until it becomes V-phase. After that, the amount was reduced to 20% of the body weight of the crab and fed with duckweed.
V. Water quality regulation Crab seedlings are maintained at a depth of about 60 cm when they are in the pond. The filtered fresh water is gradually added on the 4th day so that the water depth can reach 1 meter and the water can be changed first. The daily water exchange volume is used to cultivate the pool water. /4. Splash lime water on the fifth day to keep the pH at around 8.
I. Pond Selection We should choose a pond with a long east-west direction and a short north-south direction near a non-polluted water source, convenient drainage and drainage, and convenient transportation. 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, the crab stocking stocking density of 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, rearing and management in the crab pond, feed the fish, the daily amount of 100% crab weight, every 2 hours to vote until the IV phase of crab, the amount of daily changes to 50% of crab weight, Feed it in 2 doses until it becomes V-phase. After that, the amount was reduced to 20% of the body weight of the crab and fed with duckweed.
V. Water quality regulation Crab seedlings are maintained at a depth of about 60 cm when they are in the pond. The filtered fresh water is gradually added on the 4th day so that the water depth can reach 1 meter and the water can be changed first. The daily water exchange volume is used to cultivate the pool water. /4. Splash lime water on the fifth day to keep the pH at around 8.
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