养鱼会因各种病害的发生而影响产量和养殖效益。为了减少发病率,提高养殖效益,进行无公害养殖,就要做好鱼病生物防治技术的应用。动物植物共生:由于残饵、鱼类粪便等沉积于池底,发酵腐烂,不仅污染水质,还易滋生有害病原体。而水生植物却可以此作为肥料加 Fish will be affected by the occurrence of various diseases yield and breeding benefits. In order to reduce the incidence, improve farming efficiency, pollution-free farming, we must make good use of fish disease prevention and control technology. Animal and plant symbiosis: Due to remnant bait, fish excrement and other deposits in the bottom, fermentation decay, not only pollute the water quality, but also easy to breed harmful pathogens. Aquatic plants can do this as fertilizer