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北方多数养鱼地区,每年都有大量商品鱼和鱼种需要压塘越冬,越冬死鱼现象十分严重,给养殖业者造成了较重的经济损失。因此,加强越冬管理,切实做好防病工作,以安全越冬在生产上具有重要意义。一、越冬前的鱼病检查及营养性疾病防治在鱼类停食前30天左右,对计划越冬的鱼类进行全面
In most areas of northern fish culture, every year, a large number of commercial fish and fish species need to over-winch. The phenomenon of overwintering and dead fish causes serious economic losses to aquaculture operators. Therefore, it is of great significance to strengthen winter management, effectively prevent diseases and prevent overwintering in production. First, pre-winter fish disease inspection and prevention and treatment of nutritional diseases in the fish before eating about 30 days, the planning of overwintering fish comprehensive