中文摘要：

研究施肥量和灌水量对不同滴灌模式棉花产量、水分利用效率（WUE）的水氮耦合效应影响。试验设置1带4行、2带4行、2带6行三种滴灌模式,灌水量和施氮量采用二次通用旋转组合设计,进行大田小区棉花膜下滴灌实验。结果表明,棉花产量的水氮耦合效应：灌水量和施氮量对棉花产量的影响,三种模式均表现为灌水量〉施氮量,在灌水量65.1-284.9 mm的范围内,三种模式棉花产量与灌水量呈显著正相关。棉花产量与施肥量的关系,1带4行在施氮量27.6-94.2 kg/hm^2呈显著的正相关。2带4行在施氮量27.6-69.0 kg/hm^2呈负相关,施氮量69-94.2 kg/hm^2呈正相关。2带6行施氮量27.6-55.2 kg/hm^2呈正相关,施氮量55.2-94.2 kg/hm^2呈负相关;棉花WUE的水氮耦合效应：灌水量和施肥量对棉花WUE的影响,三种滴灌模式表现为施氮量〉灌水量。棉花WUE与施氮量的关系,1带4行呈显著的正相关,2带4行施氮量27.2-44.4 kg/hm^2呈显著负相关,施氮量44.2-94.2 kg/hm^2呈正相关。2带6行在施氮量27.6-55.2 kg/hm^2呈正相关,施氮量55.2-94.2 kg/hm^2呈负相关。在灌水量65．1-284．9mm的范围内，三种滴灌模式棉花水分利用效率与灌水量均呈显著的负相关。根据不同滴灌模式的水氮耦合效应，提出以棉花产量、砌为目标的不同滴灌模式水氮高效利用策略。

英文摘要：

The coupling effect of water and nitrogen on cotton yield and water use efficiency（WUE） was studied under different drip irrigation patterns. The field experiments were conducted in three drip irrigation patterns including 1 pipe 4 lines, 2 pipes 4 lines and 2 pipes 6 lines, in which universal design of the second rotation was used. The result showed that the coupling effect of water and nitrogen on cotton yield was more significant than nitrogen under three drip irrigation. In applying water of 65.1 - 284.9 mm, three drip irrigation patterns were positive correlation between cotton yield and water. In the applying nitrogen of 27.6 - 94.2 kg/hm^2, 1 pipe - 4 lines were positive correlation between nitrogen and cotton yield, 2 pipes - 4 lines negative correlation in applying nitrogen of 27.6 - 69.0 kg/hm^2 and positive correlation in the applying nitrogen of 69 - 94.2 kg/hm^2, 2 pipes - 6 lines positive correlation in applying nitrogen of 27.6 - 55.2 kg/hm^2 and negative correlation in applying nitrogen of 55.2 - 94.2 kg/hm^2. For the coupling effect of water and nitrogen on water use efficiency（WUE）, water was more significant than nitrogen under three drip irrigation patterns. 1 pipe- 4 lines was positive correlation between nitrogen and WUE. 2 pipes- 4 lines was negative correlation in applying nitrogen of 27.2 - 44.4 kg/hm^2 and positive correlation in applying nitrogen of 44.2 - 94.2 kg/hm^2, 2 pipes-6 lines was positive correlation in applying nitrogen of 27.6 - 55.2 kg/hm^2 and negative correlation in applying nitrogen of 55.2 -94.2 kg/hm^2. In applying water of 65.1 - 284.9 mm, three drip irrigation patterns were negative correlation between water and WUE. According to water and nitrogen coupling effect in different patterns of drip irrigation, a management strategy was set forward with increasing cotton yield and WUE as the objectives.