First, the cause of soft shell crab
During the listing period of crabs, there are often cases where the back shell of the river crab is soft and not hard. The muscles in the body are not full. The accumulation of crab crab paste is relatively less and the plumpness is not high. The reason is mainly the feed nutrition in the later stage. No, management is not in place, water quality is poor, calcium ion content in the pool is low, or due to other crab diseases, soft shell crabs are less meat, poor taste, unpopular in the market.
Second, the soft shell crab prevention and treatment measures
1, before and after the crab shell, Quanchiposa amino acid ion calcium or calcium dihydrogen phosphate and vitamin C, to supplement the free calcium ions in the pond, promote rapid absorption of calcification crab;
2. Strengthen the regulation of pond water quality. After the completion of the last oyster shell, water quality and sediment quality improver should be used frequently to create a good environment for crabs and promote healthy growth of crabs;
3. Increase the feeding ratio of animal foods. After the last molting of the crab, immediately increase the proportion of animal feeds such as small trash fish. Generally, animal feed should account for more than 60%, and the number of feedings should be increased at the same time to supplement the physical energy consumed by crab growth.
4. When soft-shelled crabs are found, they should be promptly placed in a pool for centralized intensive cultivation. At the same time, oxygenation agents or aeration facilities should be properly sprinkled to increase the dissolved oxygen in the water and promote rapid calcification of crab shells.
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