1. Site selection: Choose paddy fields with sufficient water, pollution-free water quality and convenient transportation, clean up excess sludge in the fields, disinfect them with quicklime, and add crab seedlings, keeping the water depth at about 2 meters. 2. Choose crab seedlings: find crabs with uniform size and sound limbs as crab seedlings. 3. Feeding management: the number of feeding does not exceed 300. Feed more corn, wheat and other foods in summer to promote growth. Pay attention to adding small fish, snails and other foods in autumn to ensure adequate nutrition. Change water 1 time in spring and autumn, once in winter 1 time, and once every 7 days in summer. 4, the use of raw limestone and other items to prevent diseases.

1. Hairy crab culture technology and method

1, choose a farm.

(1) Choose ponds, paddy fields or other places with sufficient water regulation conditions and unpolluted water quality, and take escape prevention measures around them.

(2) Clean up the surplus silt weeds in the farmland and sprinkle quicklime for disinfection.

(3) Soak in water for 1 day, then drain the pond, add water after 3-5 days, and add a proper amount of snails, which can provide food for hairy crabs and purify the water quality.

(4) Before breeding, plant some aquatic plants around the breeding pond to enhance the oxygen content, so that hairy crabs can rest in the aquatic plants.

Step 2 choose crab seedlings

Selecting hairy crabs with uniform coat color, normal size, healthy limbs and no diseases can ensure the survival rate of crab seedlings and enhance their growth rate and reproductive ability.

3. Scientific stocking

(1) Disinfect the crab seedlings in advance to avoid affecting the water quality of the farm and the growth of other crab seedlings.

(2) The stocking depth should be kept at1.5-2m, and the water temperature should be kept at about 20-25 degrees. After 1 month, the crab seedlings can return to normal temperature.

(3) Generally, the stocking amount is about 300, which can ensure the activity space and sufficient food for crab seedlings.

4. Feeding management

(1) Summer is the peak season for hairy crabs. At this time, crabs can be fed some nutritious food to promote their rapid growth, such as corn, wheat or pumpkin.

(2) Pay attention to fattening when feeding in autumn, and increase the number of small fish, snails and mussels in farms to ensure that the food of hairy crabs must be sufficient and nutritious.

5. Water quality management

(1) Water should be changed every half month in spring and autumn 1 time, especially when the chess game is hot, water should be changed in about 7 days.

(2) The temperature is relatively low in winter, so it is enough to change water 1 time in June.

(3) Disinfect the farm in time.

(4) Check the water quality in time, and salvage the rest of the feed eaten by hairy crabs in time to avoid the water quality being damaged. Pay attention to the transparency of the water. If it becomes turbid, pay attention to changing the water in time.

6, pest control

The use of limestone, erythromycin, chitin, ecdysone, formalin, copper sulfate, rat cage, mousetrap, etc. can effectively prevent and control the harm of gill rot, edema, crab slave parasitic disease and water vole in hairy crabs.

7. Matters needing attention

Hairy crabs generally mature in autumn and are active at night. They should fish at night, choose crabs of moderate size, then put them in clean water and clean up the mud before selling.

Second, how long is the breeding cycle of hairy crabs?

The breeding cycle of hairy crabs is about 1.5 years. If crab seedlings are introduced in April of 1, then the whole breeding cycle will be completed about 10 days before Mid-Autumn Festival, from breeding to growing crab bags in February of that year, and then to breeding in big ponds in the following year.