Experiments of artificial hatching and fry cultivation of triploid rainbow trout(Oncorhynchus mykiss)eyed eggs were carried out in the constant temperature salt-alkali cold water hatching work-shop in Pingchuan District,Baiyin City,Gansu Province.Through key technologies such as water quality control,disease prevention and control,nutrition enhancement and scientific feeding,the model of artificial hatching and fry cultivation of triploid rainbow trout eyed eggs with constant tem-perature salt-alkali cold water was explored,and good economic benefits were obtained.The hatch-ing rate of eyed eggs of triploid rainbow trout reached 92%,and the survival rate of fish fry reached more than 80%.
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