1999年我站承担了县科技局下达的“池塘养蟹生态防病养殖技术”研究课题,经两年的精心实施,取得了明显的效果。一是发病率明显降低,试验塘口平均发病率降低60%—80%,用药成本由原来的亩平均130—150元降到80—100元;二是成活率明显提高,产量增加。由于生态环境的改良,发病减少,使河蟹生长正常,成活率明显提高,产量增加,亩增产10—15公斤以上,平均提高单产二成多;三是河蟹品质明显提高。由于移植水草,改良用水,河蟹普遍个大,色泽艳丽,品味提高;四是经济 In 1999, I undertook the research topic of “pond crab eco-disease prevention and breeding technology” issued by County Science and Technology Bureau, and achieved remarkable results after two years of meticulous implementation. First, the incidence was significantly reduced, the average incidence of experimental ponds to reduce the 60% -80%, the cost of medication from an average of 130-150 yuan to 80-100 yuan; Second, significantly increased survival rate, increased production. Due to the improvement of ecological environment, the morbidity decreased and the crabs grew normally. The survival rate was obviously increased and the yield increased. The yield of mu was increased by 10-15 kg and the average yield was increased by more than 20%. Thirdly, the quality of crabs was obviously improved. As a result of transplanting aquatic plants, improving water, crabs generally large, bright color, taste improved; Fourth, the economy