不同沟灌方式水、氮调控对棉花产量及水分利用效率的影响

设置交替隔沟灌、常规沟灌和固定隔沟灌方式,施氮量和灌水量采用二次通用旋转组合设计进行试验,研究水、氮调控对沟灌棉花产量、水分利用效率的影响.结果表明:棉花产量与施氮量在56.2～95.2kg·hmˉ2范围内呈显著正相关,与灌水量在37.52～160.00mm范围内呈显著正相关.相同水、氮处理下交替隔沟灌与常规沟灌相比棉...

Effect of Regulation of Water and Nitrogen on Cotton Yield and Water Use Efficiency under Different Furrow Irrigation Patterns

By setting the alternative furrow irrigation, conventional furrow irrigation, and fixed every-other furrow irrigation, the amount of nitrogen and irrigation design using two general rotation experiment conducted to study the regulation effect of water and nitrogen on cotton yield and water use efficiency. The results showed that: cotton yield was significantly positively correlative, with nitrogen applied amount in the range of 56.2 ~ 95.2 kg·hm^-2, and same as cotton yield and water within 37.52 ~ 160.00 mm; Cotton yield was not significant different under the same water and nitrogen treatments between alternative furrow irrigation and conventional furrow irrigation, cotton yield of conventional furrow irrigation was higher on average than the fixed every-other furrow irrigation by 9.15%. Cotton water use efficiency and nitrogen within 56.2 ~ 122.8 kg·hm^-2 was a significant positive correlation, and was significantly negatively correlated with irrigation within 37.52 ~160.00 mm. Cotton water use efficiency was no significant difference under the same water and nitrogen treatments between conventional furrow irrigation and alternative furrow irrigation, and conventional furrow irrigation was higher on average than the fixed every-other furrow irrigation in cotton water use efficiency by 9.01%. Therefore, alternative furrow irrigation can increase the cotton yield and water use efficiency.