我区气候寒冷,结冰期长,家鱼的产卵期一般在六月中下旬,所以苗种培育期仅七、八两个月的时间。培育期短就很难在当年培育出大量的大规格鱼种,这样必然要延长成鱼的养鱼周期,影响商品鱼的上市量。促使亲鱼提早产卵是在当年培育出大规格鱼种的重要途径之一。目前,我区在利用电站余热促使亲鱼提早产卵尚有困难的情况下,能否在亲鱼春季培育期间,用注入激素的生理刺激方法,加快亲鱼性腺发育速度,从而获得早产呢?为了回答这个问题,我们于一九七七年春季用LRH—A及干、鲜鲤垂体等激素,对草亲鱼进行了催熟注射试验,现将试验情况简报如下。 Cold climate in our region, a long ice period, the spawning period of fish is generally late in June, so seedling cultivation period of only seven or eight months time. It is difficult to cultivate a large number of large-scale species breed that year, it is bound to extend the fish into the fish cycle, affecting the amount of fish market. Promote the broodstock to lay eggs early is one of the important ways to cultivate the large size fish species. At present, our district is using the power station waste heat to promote early broodstock spawning is still difficult circumstances, whether during the broodstock during the spring broodstock, with physiological stimuli injected into the hormone to speed up the growth rate of broodstock gonads in order to obtain premature birth? In order to answer this Issue, we conducted a ripening injection test on grass carp with LRH-A and hormones such as dried carp and carp pituitary in the spring of 1977. The briefing on the test is as follows.