Crab ponds can be used to raise crawfish

The reader of Guanzhen Town, Yuxian County, said on the phone that he had stocked 20 kilograms of 200 crabs per kilogram in 10 acres of crab ponds. He asked if they could restock some of the crayfish in the crab pond. If so, how many tails should be suitable? .

According to Chen Huangen, chief of the promotion department of the Jiangsu Provincial Aquatic Technology Promotion Station, crayfish will compete with crabs for oxygen, compete for oxygen, compete for aquatic plants, and both have the habit of self-mutilation and disability. Traditional crayfish have always used crayfish as a crab pond. The predator creatures have a certain risk of nesting crayfish in crab ponds. However, judging from the practice of breeding, it is feasible to raise crayfish in a crab pond. Crab pool nest crayfish to solve the following problems:

(1) kind of good plants. Since both crabs and crayfish consume some of the plants, it is necessary to ensure that the amount of water plants in the crab ponds will cover more than 50% of the entire pond area. This will minimize the impact of river crabs and crayfish on each other. The crayfish is best placed in the crab pond after the plants grow up.

(2) Put enough feed to feed it properly. Allowing crabs and crayfish to be eaten is an important measure for avoiding the killing and killing of crabs and crayfish. Therefore, accurate knowledge of the amount of crabs and crayfish in the pond should be given. In the feeding of feed at the same time to put enough fresh snails, put the amount of fresh snails per mu more than 250 kg, usually 250-500 kg. Feed feeding should grasp the principle of "two fine and medium thick". When a large amount of feed is fed, attention should be paid to regulating and controlling the quality of water so as to avoid deterioration of water quality caused by feeding a large amount of feed and causing the death of shrimps and crabs.

(3) Pay attention to fertilizing water quality in the early stage of crayfish rearing, apply some basal fertilizer in an appropriate amount, and cultivate small zooplankton for feeding crayfish.

Generally, the crab ponds are set with 2,000 cm of 2-3 cm shrimp per acre, and the stocking amount should not be too much, otherwise it will cause breeding failure. During the cultivation period, timely use of cages, etc., will catch crayfish and keep them small, so as to reduce the density of crayfish in the pond during the later period and ensure the growth of crabs.

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