冬放鱼种，不仅成活率比春放高，而且增重速度快，因此，精养鱼塘应提倡各放鱼种。在冬放鱼种时，要注意以下几点：1冬季成鱼起水后，要清除污泥，护好塘坡，然后用生石灰严格消毒。2用食盐、晶体敌百虫等消毒药物进行鱼种消毒，有条件的地方可进行人工免疫注射（以草鱼为主） Winter fish species, not only higher than the survival rate of spring, and weight gain fast, therefore, intensive fish ponds should promote the release of fish species. In the winter when the species of fish, should pay attention to the following points: 1 adult winter fish into the water, to remove sludge, protect the pond slope, and then strictly disinfect lime. 2 with salt, crystal trichlorfon and other disinfectants for species disinfection, conditional place for artificial immunization (grass-based fish)