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[1]YIN Xiushuai,WANG Shiwen,DENG Xiping,et al.Effect of Irrigation on Population Dynamics, Yield and Water Consumption Characteristics of Winter Wheat at Elongation Stage Under Different Nitrogen Application Levels in Dryland[J].Research of Soil and Water Conservation,2018,25(05):179-186.

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Effect of Irrigation on Population Dynamics, Yield and Water Consumption Characteristics of Winter Wheat at Elongation Stage Under Different Nitrogen Application Levels in Dryland

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 05 Page number: 179-186 Column: Public date: 2018-09-06

Title:: Effect of Irrigation on Population Dynamics, Yield and Water Consumption Characteristics of Winter Wheat at Elongation Stage Under Different Nitrogen Application Levels in Dryland

Author(s):: YIN Xiushuai^1,3, WANG Shiwen^2,3,4, DENG Xiping^1,3,4, LI Yulin^1,3, YANG Wenjia^2,3, SUN Haini^2,3; 1. College of Life Sciences, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China

Keywords:: winter wheat; fertilization; supplemental irrigation; yield; water use efficiency

CLC:: S512.1⁺1

DOI:: -

Abstract:: Excessive nitrogen (N) fertilizer application widely exists in winter wheat production in dryland area in order to get high yield. A field experiment was conducted to study the effects of nitrogen application levels combined with supplemental irrigation on the population dynamics, dry matter accumulation, yield components and water consumption characteristic of winter wheat during two growth seasons (2015-2017). A split plot experiment with two factors including two irrigation treatments (watering 30 mm at elongating stage and no watering) and four nitrogen fertilization application levels (0 kg/hm²,60 kg/hm²,120 kg/hm² and 180 kg/hm²) was conducted. The results showed that dry matter accumulation and water consumption significantly increased with nitrogen application rates increasing from 0 to 120 kg/hm², but not increased from 120 to 180 kg/hm²; supplemental irrigation at elongation stage increased the yield and spike number under treatment of 120 kg/hm², but it decreased under treatment of 0 kg/hm²; compared with no irrigation, the irrigation increased the water use efficiency by 19% to 22% in the treatment of 180 kg/hm², and the yield have reached up to 5 100 to 6 100 kg/hm². These results indicated that supplemental irrigation at elongation stage could reduce nitrogen application in dryland. In summary, combination of application of 120 kg/hm² of nitrogen with irrigation at elongation stage was the best practice.

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