水分对枣棉间作复合系统产量及水分生产率的影响

Effects of Water on Yield and Water Use Efficiency in Jujube-cotton Intercropping System

为探明适宜于南疆枣棉间作复合系统合理的灌水量,设置4个水分梯度,采用随机区组试验设计,研究枣棉间作不同水分处理对枣棉间作复合系统产量及水分生产率的影响。结果表明,随着灌水量的增加,枣棉间作群体产量呈现先减小后增加再减小的趋势;灌水量5250 m^3/hm^2处理产量最高,为2828.9 kg/hm^2,与灌水量3750、4500、6000 m^3/hm^2处理产量差异显著;不同水分处理下的水分生产率有明显差异,依次为灌水量3750 m^3/hm^2>灌水量5250 m^3/hm^2>灌水量4500 m^3/hm^2>灌水量6000 m^3/hm^2。因此,枣棉间作最佳灌水量为5250 m^3/hm^2。

In order to explore the reasonable irrigation amount suitable for jujube-cotton intercropping system in South Xinjiang,four water gradients were set up,and the effect of different water treatment on the yield and water productivity of jujube-cotton intercropping system was studied by randomized block experiment design.The results showed that the yield of jujube-cotton intercropping decreased first,then increased and then decreased with the increase of irrigation amount.The yield of 5250 m^3/hm^2 treatment was the highest(2828.9 kg/hm^2),which was significantly different from that of 3750 m^3/hm^2,4500 m^3/hm^2 and 6000 m^3/hm^2 treatment.There were significant differences in water productivity under different water treatment,in order of irrigation amount 3750 m^3/hm^2>irrigation amount 5250 m^3/hm^2>irrigation amount 4500 m^3/hm^2>irrigation amount 6000 m^3/hm^2.Therefore,5250 m^3/hm^2 is the best irrigation amount for jujube-cotton intercropping.