高产池塘精养投放鱼种一要抓早放 ,二要抓大规格 ,这是至关重要的 ,不可忽视。但目前部分地区某些养鱼专业户仍习惯于春放鱼种 ,有的甚至推迟到春后 ,此时鱼种规格小 ,成活率低 ,是池塘养鱼低产的根本原因之一。现将抓好池塘投放鱼种关键措施简介如下。1　鱼种要早放渔业生产一 High-yielding pond put one kind of intensive fish put early, and second, we must grasp the large size, which is crucial, can not be ignored. However, in some areas, some specialized fish farming households are still accustomed to spring fish stocking, and some even postponed to spring. At this time, the small fish species and low survival rate are one of the fundamental causes of low-yield fish ponds. At present, the key measures for putting fish in ponds are given as follows. A fish species to fishery production early one