利用赤霉素诱导向日葵雄性不育,可以直接利用品种、品系或自交系间的杂种优势;也可以解决田间试验中配制大量杂交组合省去人工去雄问题。利用赤霉素诱导雄性不育,国外早有报道,但国内这方面的研究不多,特别是对赤霉素的使用浓度众说不一,因此影响了赤霉素在实际工作中的作用。为了明确赤霉素在向日葵应用中的最佳使用浓度,我们于1988～1989年在吉林省向日葵研究所试验田做了此项试验。 Induction of male sterility of sunflower with gibberellin can directly utilize the heterosis among cultivars, lines or inbred lines. It can also solve the problem of artificial extirpation by formulating a large number of crosses in field experiments. The use of gibberellin-induced male sterility, foreign reports have long been reported, but the domestic research in this area is not much, especially the concentration of gibberellic acid in different concentrations, thus affecting the role of gibberellin in the actual work. In order to determine the optimum concentration of GA for sunflower application, we did this experiment in the experimental field of Sunflower Research Institute of Jilin Province from 1988 to 1989.