养殖场的鲤鱼种主要是在池塘越冬。越冬期间鱼种平均死亡约50～60％,而有的养殖场死亡率甚至可高达90～100％,造成巨大的经济损失。鲤鱼种死亡的原因是,在不良的环境中鱼体内消耗增加,体质衰弱所致。所以,必须改善鲤鱼种越冬条件,尽可能地减少鱼体日消耗。为此,进行了一次旨在证明鲤鱼种可以在半咸水中有效越冬的试验。众所周知,为保持鱼体在淡水中的渗透和离子调节,需消耗20～40％的代谢能。当水中盐度增加时,鱼体内外盐分可达到均衡,能耗则可降低到最低限度。试验分4组进行。第1组在池塘设置的网箱 Carp species farms are mainly in the pond through the winter. During the winter, the average death of fish species is about 50 ~ 60%, while some farm mortality even as high as 90 to 100%, resulting in huge economic losses. The reason for the death of carp is that the consumption of fish in an adverse environment is increased and the body is weak. Therefore, it is necessary to improve the carp species overwintering conditions, as far as possible to reduce the daily consumption of fish. To this end, a trial was conducted to demonstrate that carp species can survive overwintering in brackish water. It is well-known that in order to maintain penetration and ion regulation of freshwater, it consumes 20-40% of the metabolic energy. When the water salinity increases, the fish can reach a balanced salt within and outside, energy consumption can be reduced to a minimum. The experiment was divided into 4 groups. Group 1 Cages set up in ponds