中文摘要：

为了解氮肥对北疆滴灌复播青储玉米生理指标的影响，提高氮肥利用效率，通过田间小区试验，研究了一管一行毛管布置模式下，不同氮肥处理（100、170、240、310、380 kg·hm -2）对复播青储玉米光合特性、土壤铵态氮分布的影响。结果表明，不同氮肥处理条件下复播玉米叶片净光合速率、蒸腾速率日变化曲线均呈单峰型；土壤铵态氮含量总体上随施氮量的增加先减少后增加；产量随施氮量的增加先增加后减小。综合分析认为，一管一行毛管布置模式下，240 kg·hm -2的施氮量处理下水氮耦合效果最佳，土壤铵态氮含量总体最少，产量与叶片水分利用效率最高，净光合速率较高。

英文摘要：

In order to investigate the effects of nitrogen （N） fertilizer on the physiological indexes of drip irrigated silage maize by sequential cropping in north Xinjiang ,to increase N fertilizer utilization efficiency ,through the field plot experiments have researched the effects of photosynthetic characteristics and soil NH4 ＋ -N distribution under the layout pattern of one row with one lateral pipe and different N fertilizer treatments （i .e .,100 ,170 ,240 ,310 kg·hm - 2 and 385 kg·hm - 2 ） .The results showed that ：For different N fertilizer treatment condition ,the daily change curves of the net photosynthetic rate of the leaves and transpiration rate of the sequential cropping maize displayed a single peak type . Holistically ,soil total NH4 ＋ - N content decreased at first and then increased with increasing the N application .The yield increased at first and then decreased with increasing N application .Through the comprehensive analysis ,we think under the layout pattern of one row with one lateral pipe ,the N fertilizer application treatment of 240 kg·hm - 2 was the best effect of water - N coupling with the lowest soil total NH4 ＋ -N content ,highest yield and water use efficiency of the leaf ,and a relatively high net photosynthetic rate .