20世纪90年代以来,水产养殖业迅猛发展,集约式工业化养殖规模日益扩大。大规模高密度的养殖水体含有大量粪便和残饵,造成水体中氮、磷等营养物质含量持续增高,加上长期的外源负荷造成污染物在水体中大量积累,容易引起严重的内源污染。水体富营养 Since the 1990s, the aquaculture industry has developed rapidly and the scale of intensive industrialized aquaculture has been expanding. Large-scale high-density aquaculture water contains large amounts of excrement and bait, resulting in nitrogen, phosphorus and other nutrients in water continued to increase, coupled with long-term external load caused by a large number of pollutants in the water accumulation, easily lead to serious endogenous pollution . Water eutrophication