一、创造良好的水质环境包括改善池塘底质和水质两个方面。首先,必须清除池底过多的淤泥、有机物、寄生虫等。其次,应科学调节水质,用水泵换水,用增氧机增加水中溶氧量,并定期用生石灰、漂白粉等进行消毒,给池鱼创造一个良好的生长环境。二、调整养殖结构,改革养殖制度。一是通过调整养殖品种结构,即利用杂食鱼清除残饵,用肥水鱼净化水质。在以草鱼为主的成鱼塘中搭配混养罗非鱼,既能提高鱼产量,又可使草鱼成活率明显提高。二是改革养殖制度,调整养殖生长周期,避开鱼发病高峰期。三、改进饲养管理,提高鱼体抗病力。一是改进投饵技术,做到科学合理投喂。尤其在“大麦黄”、“白露心”两个变温期发病高峰期,要节制投喂,以防鱼肠炎病的发生和蔓延。二是改进施肥技术。在按常规做到“四看”、适时、少施、勤施的同时,应根据水温和水质的变 First, to create a good water environment, including the improvement of pond sediment and water quality in two aspects. First of all, it is necessary to remove excess sludge, organic matter and parasites from the bottom of the pond. Secondly, it is necessary to adjust the water quality scientifically, change the water with the water pump, increase the amount of dissolved oxygen in the water with the aerator, and regularly disinfect with the quicklime and bleaching powder to create a good growth environment for the fish. Second, adjust aquaculture structure, reform farming system. First, by adjusting the structure of cultured breeds, that is, the use of omnivorous fish to remove bait, water purification with fertilizer water fish. In grass carp-based fish ponds with mixed tilapia, both to improve fish production, but also significantly improve the survival rate of grass carp. Second, the reform of aquaculture system, adjust the breeding cycle, to avoid the peak incidence of fish. Third, improve feeding and management, improve fish disease resistance. First, improve the feeding technology, so scientific and reasonable feeding. Especially in the “barley yellow ”, “white exposed heart ” the peak temperature of two variable temperature period, to be controlled feeding, to prevent the occurrence and spread of enteritis disease. The second is to improve fertilization technology. In accordance with the conventional “four see ”, timely, less facilities, ground facilities at the same time, should be based on changes in water temperature and water quality