Abstract: Four treatments of spraying hormones on the female parents of Shanyou 63 during its headingstage showed that in comparison with spraying GAalone, spraying GA₃ alone, spraying it with Huatiaolin orHuaxinlin, could induce fiowering in advance, accelerate flowering process, increase stigma exsertion and outcross fruiting rates, and increase grain vield obviously, indicating that thesetwo kinds of spraytng should be widely applied to seed preductbo as are as possible. The effectof spraying Suxiaoin88 with GA₃ needs to further verify.

Key words: Mixed spraying of hormones, Shanyou63, Seed production, Grain yield