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1龄草鱼种常规培育成活率低(一般只有30%左右),规格小,数量严重不足,成为当前鱼种生产的主要障碍。近年来,我们采取强化培育技术,改善池塘环境,提早放养,科学投饵,加强管理,结果使1龄草鱼种成活率达80%以上,出池规格达100～150g,每667m2培育池产量达500kg以上,其中主养鱼1龄草鱼种达300kg。具体措施如下:
The first-instar grass carp cultivars have a low survival rate (usually only about 30%), small size and serious shortage, which has become the main obstacle to the current production of fingerlings. In recent years, we have adopted enhanced cultivation techniques to improve the pond environment, early stocking, scientific feeding, and strengthening management. As a result, the survival rate of first-class grass carp species is over 80%, and the output of the first-class grass carp reaches 100-150g. The yield per 667m2 incubation pool 500kg or more, of which the primary fish first-class grass carp species up to 300kg. Specific measures are as follows: