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通过喷施和根灌多效唑试验，发现冬前、单棱期、二棱期施用多效唑都能缩短基部第一、二节间长度，增加茎壁厚度、机械组织厚度和维管束数目．提高植株抗倒伏能力．施用多效唑能增加穗粒数降低粒重；在对照发生倒伏情况下表现增产效果，但在对照正常生长情况下，没有增产作用，而根灌处理还有减产趋势．
Through spraying and rooting with paclobutrazol, it was found that applying paclobutrazol before winter, single-ridge and double-ridge all shortened the length of the first and second internodes, increased the thickness of the stem, the thickness of the mechanical tissue and the number of vascular bundles. Improve plant lodging capacity. The application of paclobutrazol could increase the grain weight per panicle and reduce the grain weight. When the control was lodging, the yield was increased. However, under the normal growth condition, the yield was not increased.