不同水分处理对枣园间作棉花光合特征及水分利用效率的影响

Effects of Different Water Treatments on Cotton's Photosynthetic Characteristics and Water Use Efficiency in Intercropping Jujube Orchard

为探索不同水分处理对间作棉花光合特征及水分利用效率的影响，以塔里木盆地枣园间作棉花为材料，在棉花的主要生育期，分析不同水分处理下棉花的光合指标及棉花的产量。结果表明：不同水分处理盛花期棉花叶片净光合速率、蒸腾速率的日变化均表现为单峰曲线，不同水分处理之间存在显著差异；不同水分处理之间水分利用效率存在差异，日变化平均值从大到小依次为：W3〉W2〉W4〉W1；不同水分处理之间棉花产量存在极显著差异，轻度水分胁迫下棉花产量极显著高于其他处理；塔里木盆地枣棉间作条件下，适宜棉花生长的滴灌水量为300~350 m/667 m2。

In order to explore the effect of different water treatments on intercropping cotton photosynthetic characteristics and water use efficiency in the Tarim Basin, intercropping cotton in jujube orchard was served as material, and evaluated photosynthetic index at different growth stages and yield of different water treatment. The results showed that：in different water treatments, daily changes of transpiration rate and net photosynthetic rate of cotton leaf at flowering stage exhibited a peak curve, and significant difference was detected between the different water treatment;water use efficiency was different between different water treatments, in descending order of W3〉W2〉W4〉W1;cotton yield was significantly different between water treatments, and, the cotton yield under mild water stress was significantly higher than that in other treatments; for the intercropping system of jujube and cotton in Tarim Basin, suitable drip irrigation for cotton growth is 300-350 m/667m2.