目前 ,仍有一些养蟹户以人工培育的豆蟹作为种苗放养 ,但成蟹产量不高 ,一般 1 / 1 5hm2 产 5 0kg ,少的只有十几千克 ,甚至几千克。为什么放养豆蟹产量不高呢 ?主要的原因 :一是人工培育的豆蟹 ,受近亲交配、营养不良、使用激素药物以及强化培育等因素的影响 ,先天不足 ,成活 At present, there are still some crab households to stocked bean crabs as artificial seedlings, but crabs yield is not high, generally 1/1 5hm2 yield 50kg, less only a dozen kilograms, or even a few kilograms. Why is the stocking of beans and crabs not high? The main reasons: First, artificial cultivation of beans and crabs, by the next of kin mating, malnutrition, the use of hormone drugs and strengthening the impact of such factors as cultivation, congenitally inadequate and survived