对水分胁迫影响免耕抛秧水稻产量的生理因素进行了研究 结果表明 :水分胁迫条件下免耕抛秧水稻剑叶光合效率下降、叶片早衰 ,植株干物质量与叶面积降低 ,茎鞘贮藏物质少且向籽粒中的转化能力弱 ,使水稻穗型变小、结实率下降 ,严重影响了产量 The results showed that under the condition of water stress, photosynthetic efficiency of flag leaf declined, leaf premature, plant dry matter content and leaf area decreased, and the storage material of stems and sheaths was less And the transformation ability to the grain is weak, so that the panicle of rice becomes smaller and the seed setting rate decreases, which seriously affects the yield