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用１５０ ｍ ｇ·ｋｇ－ １和２５０ ｍ ｇ·ｋｇ－ １多效唑处理二叶一心期的高粱幼苗，可不同程度地提高植株根冠比；增加其渗透调节能力，降低单位时间内失水率；提高叶片叶绿素含量和光合作用强度；降低脯氨酸含量，减轻膜伤害程度，从而提高植株的抗旱性．
Treating Sorghum seedlings with one leaf stage and one leaf stage with 150 m g · kg -1 and 250 m g · kg -1 paclobutrazol could increase root / shoot ratio of plants to different extents, increase osmotic adjustment ability, and reduce water loss rate per unit time. Improve leaf chlorophyll content and photosynthesis intensity; reduce proline content, reduce the degree of membrane damage, thereby increasing the plant’s drought resistance.