枣棉间作下不同种植密度对棉花生理特性及产量的影响

【目的】探索枣棉间作条件下不同种植密度对棉花生理特性及产量的影响,筛选出适宜间作的棉花种植密度,以期为南疆果棉立体种植模式的研究提供理论依据。【方法】在枣棉间作条件下,设置高、中、低3个密度水平(31.27×10~4、25.01×10~4和20.84×10~4株/hm~2),研究枣棉间作对棉花光合特性、干物质积累和产量的影响。【结果】枣棉间作条件下,25.01×10~4株/hm~2密度在各个时期的净光合速率较大,蒸腾速率最低值出现时间较晚,冠层结构合理,生育后期有较高的群体光合速率,光合物质累积多,皮棉产量较高。【结论】枣棉间作下不同的种植密度会对棉花生长发育特性以及产量有一定的影响,而适宜的种植密度则能优化这种立体种植模式。

Study of Different Planting Patterns on Physiological Characteris tics and Yield of Cotton in the Condition of Jujube and Cotton Intercropping

Objective]The purpose of this program was to study the different planting patterns on physiological characteristics and yield of cotton in the condition of jujube and cotton intercropping in order to screen out appropriate cotton planting density.It was expected to provide theoretical basics for the stereoscopic planting pattern in Southern Xinjiang.Method]The field experiments on the effects of 3 planting densities on the photosynthetic characteristics,dry matter and yield of cotton in the condition of j...