为了摸索鲢、鳙、草鱼在北方提早繁殖的经验,为培育大规格鱼种争得时间,吉林省梅河口市水产良种场采取四项措施,使家鱼孵化提早到5月29日并获得成功。其具体措施:一是加强亲鱼产后、秋季培育;二是亲 In order to explore the experience of early breeding of silver carp, bighead carp and grass carp in the north, four measures were taken to breed large-sized species of fish, and four measures were adopted in the aquatic breeding farm in Meihekou City, Jilin Province to make hatching of the domestic fish advance to May 29 . The specific measures: First, to strengthen the broodstock postnatal and autumn training; the second is pro