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喷施不同浓度的多效唑表明，多效唑可矮化植株，缩小冠形，促进根系发育；同时可降低大豆花荚脱落率，增加单株荚数、有效分枝数、百粒重，提高单位产量．叶面喷施100—200mg／kg为宜．
The application of paclobutrazol at different concentrations showed that paclobutrazol could dwarf plants, reduce the crown shape and promote root development. At the same time, paclobutrazol could reduce the rate of flower pods and increase the number of pods per plant, the number of effective branches and the weight of 100 seeds per plant, and increase the unit yield. Foliar spray 100-200mg / kg is appropriate.