How to raise crayfish:
1, Tangkou selection. Tangkou can be selected from two aspects. One is to stay away from pollution sources, such as whether there are farmland pesticide spraying or other pollution sources harmful to crayfish around Tangkou. To ensure convenient water storage and drainage at Tangkou, sandy soil is the best choice.
2. Disinfect fertilizer and water. Before crayfish are cultured, the pond mouth must be thoroughly disinfected, and quicklime can be used to disinfect the pond to eliminate the natural enemies and harmful bacteria of crayfish. Planktonic microorganisms are properly put in and some grasses are planted, such as water hyacinth, Elodea nuttallii, Hydrilla verticillata, Zizania latifolia, etc. The planting area of aquatic plants accounts for 50% ~ 60% of the total area of the pond.
3. Anti-escape measures. Crayfish have the habit of escaping upstream, so purse seine anti-escape facilities should be set around the pond, and at the same time, the width of the dam should be widened. Because crayfish have the habit of digging holes, the depth of the hole varies from 30cm to 100cm, and the best dam width is about 150cm, so as to maintain a certain dam slope and create an environment conducive to crayfish digging holes. At the same time, it is necessary to do a good job of preventing escape at the inlet and outlet, and check it frequently.
4. Put the shrimps in. The density of crayfish should not be too large or too small, and it is better to be about 0/00 kg per mu/kloc. If the density is too large, the crayfish themselves will not kill each other or exceed the carrying capacity of the water body and deteriorate the water quality. Too small, the output can not be guaranteed. It is also best to put them in the morning or at night. Before putting them in, the shrimp fry should be disinfected, and the size and specifications of the selected shrimp fry should be as consistent as possible.