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我国地域辽阔,南北纬度差大,淡水养殖极为普遍。所以在这样的情况下,鱼类越冬的管理措施也都不尽一致。今天我我们就针对这些问题和大家聊一聊。我国长江以南地区鱼类越冬期较短,冰封时间更短,结冰也薄,特别是华南地区冬季池塘根本不结冰。而且这些地区风雪少,阴雨多。鱼类越冬多采用养殖池秋放鱼种原池过冬,所以密度较小,池水也不很深,只要调节好越冬池的水质,预防鱼病,鱼类越冬成活率都较高。长江以北至黄河以南的地区越冬时间大约在100-150天之间,这些地区虽然冬季结冰,但不是太厚,有的地方甚至经不住人的重量。
China has a vast territory with a large latitude difference between north and south, and freshwater aquaculture is extremely common. Therefore, in such circumstances, the management of fish overwintering are not the same. Today, we will talk to you about these problems. In the area south of the Yangtze River in China, the wintering period of fish is shorter, the ice time is shorter and the icing is thin, especially in winter, the ponds in South China are not frozen at all. And these areas less snow, rainy and more. Overwintering fish ponds to use more fish pond autumn winter, so the density is small, the water is not deep, as long as the winter pond water quality regulation, prevention of fish disease, fish survival rates are higher overwinter. Winter in the area north of the Yangtze River to the south of the Yellow River takes about 100-150 days. Although these areas are icy in winter, they are not too thick, and in some places even people can not stand the weight of people.