赤霉素(九二○)在杂交水稻繁殖、制种上的增产效应,已引起人们的重视。近年来,笔者用小区试验、大田示范和盆钵观察等,对赤霉素的增产效应、增产机理及其使用方法进行了探讨。现将1982、1983两年的试验结果简报如下。一、材料和方法试验均采用上海溶剂厂生产的赤霉素粉剂,纯度85%以上。配制时先用95%的乙醇适量,将其充分溶解,然后加入40℃左右的温开水稀释成2000 PPM的母液,使用时直接用清水稀释到所需浓度,随配随用。 The gibberellin (920) yield-increasing effect on hybrid rice breeding and seed production has drawn people’s attention. In recent years, with plot test, field demonstration and pot observation, the author discussed the effect of increasing production of GA, the mechanism of increasing production and its using method. Now 1982,1983 two years of trial results are summarized below. First, the materials and methods of testing are used in Shanghai solvent plant production of gibberellin powder, more than 85% purity. Prepare the first with 95% ethanol amount, fully dissolved, then add about 40 ℃ warm water diluted into 2000 PPM mother liquor, when used directly diluted with water to the desired concentration, with the use of random.