实践证明，春季早投放鱼苗，不仅能促使鱼提前开食，延长生长期，提高产量，而且由于早春气温低，鱼苗活动少，在捕捞、运输和投放过程中，不易受伤，成活率高。一般在 2～ 4月投放为宜。需注意的是： 1清塘除害在放鱼苗前应放干塘水，清除塘里的杂物，平整塘底，修补加固塘基 Practice has proved that early spring put the fish fry, not only can promote the fish to eat in advance to extend the growth period and increase production, but also because of low temperature in early spring, fry less activity in the fishing, transportation and delivery process, not easy to injury, high survival rate. Generally put in 2 ~ April is appropriate. It should be noted that: 1 Qing Tong removal of harmful algae should be placed in the pond before the dry ponds, remove debris in the pond, the formation of the pond, repair pond reinforcement