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随着水产养殖集约化程度的提高,养殖水体越来越富营养化,水质恶化。影响鱼类的生长,引起鱼类发病甚至暴发死亡。所以鱼病防患于未然远重于病后治疗。1池塘养殖引发鱼病的原因1.1养殖水体中有机质过多,水质不良从近几年大量病例的分析来看,鱼病增多的主要原因是由于养殖水体中有机质过多,造成水质不良。20世纪80年代中期,随着颗粒饲料推广应用,高密度的养殖模式造成鱼类排泄物剧增,水体的有机质污染加剧,养殖水体缺氧,亚硝酸盐和氨态氮等有
As aquaculture becomes more intensive, aquaculture water becomes more eutrophic and water quality deteriorates. Affect the growth of fish, causing fish disease or even death. Therefore, prevention and treatment of fish diseases take precedence over treatment. 1 pond aquaculture caused by fish diseases 1.1 aquaculture water too much organic matter, poor water quality A large number of cases from recent years, the main reason for increased fish disease is due to excessive organic matter in aquaculture water, resulting in poor water quality. In the mid-1980s, with the popularization and application of pellet feed, the high-density aquaculture mode resulted in the rapid increase of fish excrement, the aggravation of organic matter in the water body, and the lack of oxygen, nitrite and ammonia nitrogen in aquaculture water