中文摘要：

【目的】研究施肥量和灌水量对不同滴灌模式棉花产量、氮素利用效率（NUE）、水分利用效率（WUE）的水氮耦合效应的影响。【方法】试验设置1带4行、2带4行、2带6行3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试验。【结果】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,1带4行为灌水量〉施氮量,2带4行和2带6行为施氮量〉灌水量。在灌水量65.1～284.9mm的范围内,3种滴灌模式棉花产量与灌水量呈显著正相关。棉花产量与施肥量,1带4行施氮量16.2～94.2kg·hm^-2呈显著的正相关,2带4行在施氮量为16.2～69.0kg·hm^-2呈负相关,施氮量为69.0～94.2kg·hm^-2呈正相关。2带6行施氮量为16.2～55.2kg·hm^-2呈正相关,施氮量为55.2～94.2kg·hm^-2呈负相关。棉花NUE的水氮耦合效应：灌水量和施氮量对棉花NUE的影响,3种模式均为施氮量〉灌水量。氮素利用效率与施氮量的关系,1带4行施氮量16.2～82.2kg·hm^-2,施氮量与NUE呈显著负相关,当施氮量为82.2～94.2kg·hm^-2呈显著正相关。2带4行施氮量16.2～69.0kg·hm^-2呈显著负相关,当施氮量为69.0～94.2kg·hm^-2呈显著正相关。2带6行在施氮量16.2～94.2kg·hm^-2呈负相关。在灌水量65.1～284.9mm的范围内,3种滴灌模式氮素利用效率与灌水量呈正相关。棉花WUE的水氮耦合效应：灌水量和施氮量对棉花WUE的影响,1带4行和2带4行灌水量〉施氮量,2带6行为施氮量〉灌水量。施氮量与水分利用效率,1带4行呈正相关,2带4行施氮量为16.2～41.4kg·hm6-2呈负相关,施氮量为44.2～94.2kg·hm^-2呈正相关。2带6行在施氮量为16.2～55.2kg·hm^-2呈正相关,施氮量为55.2～94.2kg·hm^-2呈负相关。在灌水量65.1～284.9mm范围内,3种滴灌模式棉花水分利用效率与灌水量均呈负相关。【结论】根据不同滴灌模式对水氮耦合效应,建立以棉花产量、NUE

英文摘要：

[ Objective] The objective of the paper was to study the coupling effect on cotton yield, nitrogen use efficiency （NUE） and water use efficiency （WUE） at different levels of water and nitrogen under different lateral placements. [Method] By using the factor of water and nitrogen in different drip irrigation lateral placements that including 1 lateral 4 rows, 2 laterals 4 rows and 2 laterals 6 rows, which using universal design of the second rotation, field experiments were conducted. [Result] The result showed that as for the coupling effect of water and nitrogen on cotton yield, that of water was more significant than nitrogen under 1 lateral 4 rows, nitrogen was more significant than water under 2 laterals 4 rows and 2 laterals 6 rows. Cotton yield of three drip irrigation patterns were positive correlated when irrigation water at 65.1-284.9 ram. At a certain level of nitrogen, in 1 lateral 4 rows, a positive correlation between nitrogen and cotton yield when nitrogen was 16.2-94.2 kg·hm^-2, in 2 laterals 4, a rows negative correlation when nitrogen was 16.2-69 kg·hm^-2and a positive correlation when nitrogen was 69-94.2 kg·hm^-2, in 2 laterals 6, a rows positive correlation in 16.2-55.2 kg·hm^-2 and a negative correlation in 55.2-94.2 kg·hm^-2. As for the coupling effect of water and nitrogen on nitrogen use efficiency （NUE）, nitrogen was more significant than water under the three drip irrigation patterns. In 1 lateral 4 rows, a negative correlation between NUE when nitrogen was 16.2-82.2 kg·hm^-2 and a positive correlation when N was 82.2-94.2 kg·hm^-2. In 2 laterals 4 rows, a negative correlation between NUE when nitrogen was 16.2-69.0 kg·hm^-2 and a positive correlation whan N was 69.0-94.2kg·hm^-2. In 2 laterals 6 rows, a negative correlation between NUE and when applied nitrogen within 16.2-94,2 kg·hm^-2. As for the three drip irrigation patterns, a positive correlation between water and NUE when irrigation water was in 65.1-284.9 mm. As for the coupling effect of water and nitrogen