Coupling effects of water-nitrogen on water and nitrogen use efficiency and yield of winter wheat under drip irrigation
SUI Juan1,2, WANG Jiandong1,2, GONG Shihong1,2, ZHANG Yanqun1,2, CEN Juanjuan3, GUO Jian4
1. Irrigation and Drainage Department, China Institute of Water Resources and Hydropower Research, Beijing 100048, China; 2.National Center of Efficent Irrigation Engineering and Technology Research, Beijing 100048, China; 3.Agriculture and Water Resources Bureau of Liubei, Liuzhou, Guangxi 545002, China; 4.Qinghai Water Conservancy and Hydrapower Design Research Institute, Xining, Qinghai 81000, China
Abstract：With reference to the cumulative 20 cm diameter pan evaporation(E), a field experiment was conducted for 2 consecutive years(2012—2013)to study the coupling effects of water-nitrogen on water consumption, crop physiological indexes and yield of winter wheat under drip irrigation in the North China Plain. The results indicated that the irrigation-scheduling had significant effects(at 0.05 level)on water consumption, LAI and wheat yield. In a nitrogen application range of 120 to 290 kg/hm2 with drip irrigation, water-nitrogen coupling effects had no significant influence on water consumption. At 140-190 kg/hm2 with irrigation level of 0.80E under drip irrigation, the yield was higher and residual nitrate nitrogen after one season was less. Furthermore, significant increasing in irrigation level and nitrogen level would lead to significant decline in wheat yield. Referring to guarantee yield and low environmental contamination risks, an optimized water-nitrogen combination, irrigation level of 0.80E with nitrogen application of 140-190 kg/hm2, was recommended under drip irrigation in the North China area.
隋娟,, 王建东,, 龚时宏,, 张彦群,, 岑娟娟, 郭健. 滴灌水氮耦合对水氮利用及冬小麦产量的影响[J]. 排灌机械工程学报, 2016, 34(6): 532-538.
SUI Juan,, WANG Jiandong,, GONG Shihong,, ZHANG Yanqun,, CEN Juanjuan, GUO Jian. Coupling effects of water-nitrogen on water and nitrogen use efficiency and yield of winter wheat under drip irrigation. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(6): 532-538.
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