1, breeding pond conditions: the northern breeding selection of pond area is generally 10-20 acres of medium and small ponds is appropriate, to choose sufficient water, pollution-free, small mixed fish and shrimp shellfish resources, easy access to the drainage of the sea area near the pond. Pool depth should be more than 5 meters. Pool substrate to mud and sand quality is better, the bottom of the pool to lay sand about 15 centimeters.

2, the preparatory work before breeding:

(1) the finishing of the pond: pond finishing is mainly to remove the bottom of the pond too much silt, turn loose exposure to the bottom of the pond, in addition to the maintenance of the pond embankment, gates, drains and other ancillary facilities.

(2) set up obstacles: in order to facilitate the rest of the crab seedlings and hide, when the pond renovation, but also in the bottom of the pond on the cement pipe, tile, bamboo and other obstacles.

(3) enter water and propagate bait organisms: after half a month of clearing the pond, you can open the smell into the water, in order to prevent some harmful organisms from entering the pond, you can filter seawater with a 60-purpose sieve silk mesh, the depth of the pond water is generally kept at about 80 centimeters, after the pond is filled with water, you have to apply fertilizers to cultivate the bait organisms, generally N fertilizer is 1.5kg/mu, P fertilizer is 0.3kg/mu, and you have to keep the P fertilizer is 0.3kg/mu, and the transparency of the water should be maintained at about 30 centimeters. Pond cleanup mainly includes pond renovation and drug cleaning. Pond renovation in the late fall after the crab harvest, the pond water discharge, dredging exposure. Pre-dredging with a slurry pump, late bulldozer leveling, along the pond around the ring ditch, ditch width 2 ~ 4m, low out of the beach surface 30 ~ 40cm. exposure for more than half a month, the bottom of the pond will be fully oxidized, while repairing the pond embankment, gates, drains and other ancillary facilities.