近年来，随着河蟹价格的不断下跌，病害的日趋严重，我市养殖河蟹利润越来越低，许多养殖户出现不同程度的亏本。为了稳定养殖户的养殖积极性，保住天长市２１万亩的水产养殖面积不受影响，市水产站于２０００年元月份个人集资承包２０亩地，探索生态健康种草混养鱼、虾、蟹技 In recent years, with the continuous decline of the price of crabs and the worsening of diseases, the profit of our city’s breeding crabs has been getting lower and lower, with many farmers having different levels of losses. In order to stabilize the enthusiasm of farmers, 21,000 mu of Tianchang City to keep the area of ​​aquaculture unaffected, the city aquatic plant in January 2000, the individual fund-raising contracted 20 acres of land, to explore the ecological health and breeding grass mixed fish, shrimp, crab technology