黑龙江省是养牛大省,特别是奶牛,适合开展鱼牛结合养殖技术。一般21~41kg鲜牛粪可生产鱼1kg。牛粪养鱼有较大的安全性,特别是奶牛粪,其粪便十分细腻,在水中悬浮时间长,这不仅增加了鱼类摄食的机会,也避免了因堆积而增加氧气消耗和产生有害气体。1牛舍建设牛舍不能建在鱼池边,应 Heilongjiang Province is a major cattle-growing province, especially dairy cows, suitable for the combination of fish and cattle farming techniques. General 21 ~ 41kg fresh cow dung can produce fish 1kg. Cow dung fish have greater safety, especially cow dung, its excrement is very delicate, suspended in water for a long time, which not only increases the fish feeding opportunities, but also to avoid the accumulation of oxygen consumption and the generation of harmful gases . 1 barn building barn can not be built in the edge of the fish pond should be