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蟹池选择混养池面积不宜过大和和过浅,选水草、天然饵料较丰富的水体。池塘面积20-30亩,水深1.5-2.0米,大水面网围养殖40-60亩,水深1.0-1.5米。混养品种蟹池混养鳜鱼品种,宜选用大眼鳜、翘嘴鳜,该品种生长速度快,抗病能力强,生长期内能达到较大的上市规格。混养密度蟹池混养鳜鱼,一亩放养20—30尾,每尾4-6厘米,规格不宜过小,密度不宜过大,否则将造成蟹池天然饵料不足,影响鳜鱼上市规格;密度过小则养殖效益降低。加强水质管理鳜鱼窒息点低干四大家鱼,对水体溶氧要求较高,当水中溶氧低干4毫克/升时,鳜鱼会浮头泛塘而死。生长旺季要保持水深1.5米以上,每10-15天换注一次新水,每次换水20-30厘米,有条件的池口尽可能保持水体微流状态。换水时尽可能换掉底层水,
Crab pond selection polyculture pool area should not be too large and too shallow, choose aquatic plants, natural water more abundant food. Pond area of 20-30 mu, depth 1.5-2.0 m, large surface aquaculture 40-60 mus, water depth of 1.0-1.5 meters. Polyculture breeds Crab pool polyclinic mackerel species, should use big-eyed owl, Cephalotaxus, the species grow fast, strong disease resistance, growth period can achieve greater market size. Mixed density crab pool polyculture bream fish, 20-30 acres per mu stocked, 4-6 cm per tail, the size should not be too small, the density should not be too large, otherwise it will cause crab pool natural food shortage, affecting the catfish market specifications; If the density is too low, the breeding efficiency will be reduced. Strengthen the water quality management Mud fish suffocating point low dry four big fish, the water dissolved oxygen higher, when the water dissolved oxygen low dry 4 mg / L, the catfish will float Pan Tong died. Growth season to keep the water depth of 1.5 meters or more, every 10-15 days for a new water exchange, each changing water 20-30 cm, conditional pool as far as possible to maintain water microflora state. Change the water as far as possible to replace the bottom water,