近年来河蟹养殖发展迅速,在养殖面积扩大,养殖总量提高的同时,出现了河蟹发病率高,上市规格小,高品率低,影响了养殖效益。为保证河蟹养殖健康发展,提高养殖效益。笔者认为保证河蟹养殖健康发展,提高养殖效益。笔者认为要重视以下四改工作。 In recent years, the rapid development of crab farming, breeding area in the expansion, raising the total breeding at the same time, there has been a high incidence of crabs, listed small size, high yield, affecting the breeding benefits. To ensure the healthy development of crab farming, improve farming efficiency. I believe that to ensure the healthy development of crab farming, improve farming efficiency. I think we should pay attention to the following four changes.