4.生物修复主要物质利用关系生物修复技术的机理之一是使主要物质在蟹池水体内部形成良性循环,使自身污染得到较好的控制。蟹池所投饲料主要为河蟹所摄食,少量残饵由青虾、小杂鱼清扫。各种水生动物的排泄物,又转化为青虾、小杂鱼、鲢、鳙、活螺等的天然饵料生物,或者转化为水 4. Bioremediation of major material utilization relationship One of the mechanisms of bioremediation technology is to make the main material in the creek pond body to form a virtuous circle, so that their pollution is better controlled. Crab pool feed mainly for crab feeding, a small amount of residual bait by the shrimp, small trash cleaning. The excrement of various aquatic animals, but also into freshwater shrimp, small trash fish, silver carp, bighead carp, snails and other natural food organisms, or into water