论文部分内容阅读
立秋过后,各地的高温干旱天气有所缓解,给水产养殖生产带来了福音。但初秋季节水温还是较高,鱼类仍处生长旺季。随着鱼类的快速生长,池塘养殖密度增大,水质容易污染恶化,各种致病细菌繁殖也加快,极易导致暴发性出血病的发生。因此,各地水产养殖户在饲养管理上丝毫不能放松,应积极做好鱼病的预防工作,以防止暴发性出血病这种养殖鱼类的“瘟疫”卷土重来。 一、秋季发生暴发性出血病的原因 1、冬春季节清塘不够彻底或没有清塘消毒,池底淤泥积多,以致底质老化、有害物质增多。到了秋季,养殖时间较长,鱼类经长期投料后,排出大量粪便,污染底层水体,为细菌的感染提供了可乘之机。
After the establishment of the autumn, the weather around the high temperature and drought eased, aquaculture production has brought the gospel. But the early autumn season, the water temperature is still high, fish are still growing season. With the rapid growth of fish, pond farming density increased, water pollution is easy to deteriorate, a variety of pathogenic bacteria also accelerated, easily lead to fulminant hemorrhagic disease. Therefore, aquaculture farmers in all parts of the country should not relax their feeding and management. They should actively prevent fish diseases so as to prevent fulminant hemorrhagic disease. The “plague” of farmed fish has come back. First, the reasons for the occurrence of fulminant hemorrhagic disease in autumn 1, the winter and spring clear pond is not enough or no clear pond disinfection, pond sediment and more, resulting in aging of the substrate, increased harmful substances. In the autumn, the breeding time is longer. After long-term feeding of the fish, a large amount of excrement is discharged, which pollutes the bottom water body and provides an opportunity for the bacterial infection.