Techniques and methods of raising crabs How to raise crabs?

1, pond conditions, the pond water depth is kept at about 0.6- 1.5m all the year round, and the water depth varies from place to place, with the shallowest point 10cm. Several mounds can be built in the pond, that is, crab island, where aquatic plants can be transplanted. The pond should not be too steep, and the slope ratio is generally 1: 65438. Generally, the pond is disinfected with quicklime half a month before the seedlings are released, and the dosage is 75 kg per mu.

2. Transplant aquatic plants. The main types of aquatic plants are duckweed, red duckweed, water hyacinth, water hyacinth, Haematococcus verticillata, Ceratophyllum, Sophora alopecuroides and Alternanthera philoxeroides. Pay attention to disinfection and prevention when transplanting. Escape prevention facilities mostly use plastic film, but also useful cement board, depending on their own situation.

3. Seedling density: fry bought from other places cannot be directly put into the pond. They should be soaked in water for 2-3 minutes, taken out and put in the pond for 65,438+00 minutes, and so on for 2-3 times. Young crabs gradually absorb enough water, and after adapting to the water temperature, they can be put into the pond, which can improve the survival rate. The density can be controlled within 1500 crabs/mu, and the specification is120-150 crabs/kg. If the conditions are poor or shrimp farming is the main thing, the amount of seedlings released can be reduced appropriately.

4. Feeding management. Like pond culture, the feeding method of crabs is "four observations and four decisions", that is, depending on the season, weather, water quality and crab activities, timing, location, quality and quantity.