In recent years, with the continuous development of the aquaculture industry, many farmers have increasingly used crabs in contracted fields to raise crabs. Many people have embarked on a rich road by raising crabs. However, many people raise crabs and not only don’t earn money. When the money is lost, why is this? The author recently visited a lot of crab-raising households. After visiting the discussion, we came to the conclusion that raising crabs should increase efficiency and benefit, and technically it should be the following: want".
(a) Fish and crab polyculture. The use of fresh water, wide water surface, natural rich lakes, rivers, ponds and other large water surface to implement polyculture of crabs and crabs, crab-based, mixed part of the carp, carp and squid and other high-quality fish, can make full use of water, Improve the overall economic benefits of the water surface.
(b) Self-cultivation seedlings. The use of large-scale pure Yangtze River water crabs to breed crabs and provide special ponds to cultivate their own crab species can reduce the cost of raising crabs and increase the survival rate of crab species.
(three) two years old crabs. The first year of crab breeding, the second year of commercial crab, the use of crab specifications to more than 150 grams, can improve the crab crab specifications and market competitiveness.
(d) Low-density culture. 200-500 sticks of crabs will be stocked on every acre, and they will strive to cultivate large-size crabs at the end of the year.
(E) grass crabs. It is required that the coverage of aquatic grasses in the crab waters be more than 30%. Water grass varieties can be used water hyacinth, wormwood and other emerged plants, Elodea, Vallisneria, blackgrass and other submerged plants, duckweed and other floating plants, the shore can also be grown vegetables, water peanuts and so on.
(six) snails snails. Putting a certain amount of fresh snails, scorpions, and river clams into the crab pond can both purify the water and provide the crab with abundant fresh feed.
(seven) science feeding. Young crabs are fed mainly to animal feeds, supplemented by vegetable feeds. During the crab breeding period, plant-based feeds are mainly used, supplemented by animal feeds. In the later period, it was fed with high quality animal feed for about one month.
(8) Comprehensive disease prevention. Strengthen water quality management, regularly disinfect the water body, and splash lime once every half of the year. Try to use as little or no medication as possible and do not use drugs that have side effects on crabs.
(a) Fish and crab polyculture. The use of fresh water, wide water surface, natural rich lakes, rivers, ponds and other large water surface to implement polyculture of crabs and crabs, crab-based, mixed part of the carp, carp and squid and other high-quality fish, can make full use of water, Improve the overall economic benefits of the water surface.
(b) Self-cultivation seedlings. The use of large-scale pure Yangtze River water crabs to breed crabs and provide special ponds to cultivate their own crab species can reduce the cost of raising crabs and increase the survival rate of crab species.
(three) two years old crabs. The first year of crab breeding, the second year of commercial crab, the use of crab specifications to more than 150 grams, can improve the crab crab specifications and market competitiveness.
(d) Low-density culture. 200-500 sticks of crabs will be stocked on every acre, and they will strive to cultivate large-size crabs at the end of the year.
(E) grass crabs. It is required that the coverage of aquatic grasses in the crab waters be more than 30%. Water grass varieties can be used water hyacinth, wormwood and other emerged plants, Elodea, Vallisneria, blackgrass and other submerged plants, duckweed and other floating plants, the shore can also be grown vegetables, water peanuts and so on.
(six) snails snails. Putting a certain amount of fresh snails, scorpions, and river clams into the crab pond can both purify the water and provide the crab with abundant fresh feed.
(seven) science feeding. Young crabs are fed mainly to animal feeds, supplemented by vegetable feeds. During the crab breeding period, plant-based feeds are mainly used, supplemented by animal feeds. In the later period, it was fed with high quality animal feed for about one month.
(8) Comprehensive disease prevention. Strengthen water quality management, regularly disinfect the water body, and splash lime once every half of the year. Try to use as little or no medication as possible and do not use drugs that have side effects on crabs.