美国美国主要通过严格细致的立法来防治养殖业污染。美国通过立法将养殖业划分点源性污染和非点源性污染进行分类管理,专门设有非点源性污染的管理部门,点源性污染的防治是经过收集和处理技术使污染物达到国家污染物排放许可。除了立法管理以外,美国还十分注重通过农牧结合来化解养殖业的污染问题。美国的大部分大型农场都是农牧结合型的,从种植制度安排到生产、销售等各个方面都十分重视种植业与养殖业的紧密联系,而且是养殖业规模决定着种植业结构的调整,养殖业与种植业之间在饲草、饲料、肥料3个物质经济 The United States mainly uses strict and detailed legislation to prevent and control aquaculture pollution. The United States, through legislation, classifies aquaculture into point-source pollution and non-point-source pollution, and specializes in the management of non-point source pollution. The prevention and control of point-source pollution is through the collection and treatment of technologies to bring the pollutants to the country Pollutant discharge permits. In addition to legislative management, the United States attaches great importance to solving the pollution problem of aquaculture through the integration of agriculture and animal husbandry. Most of the large-scale farms in the United States are integrated with agriculture and animal husbandry. From planting system arrangement to production and sales, all the large farms in the United States attach great importance to the close connection between crop farming and aquaculture. Moreover, the scale of the breeding industry determines the adjustment of planting structure, Aquaculture and farming in the forage grass, feed, fertilizer three material economy