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Acta Agron Sin ›› 2016, Vol. 42 ›› Issue (01): 123-130.doi: 10.3724/SP.J.1006.2016.00123


Effects of Sowing Date, Density and Nitrogen Application Amount on Nitrogen Utilization Rate of Guangmingmai 1 Grown in Rice–Wheat System

XU Hui,CUI Huai-Yang,ZHANG Wei,DING Jin-Feng,LI Chun-Yan,GUO Wen-Shan,ZHU Xin-Kai*   

  1. Jiangsu Key Laboratory of Crop Genetics and Physiology / Co-Innovation Center for Modern Production Technology of Grain Crops; Wheat Research Center, Yangzhou University, Yangzhou 225009, Jiangsu
  • Received:2015-01-13 Revised:2015-09-06 Online:2016-01-12 Published:2015-10-08
  • Contact: 朱新开, E-mail: xkzhu@yzu.edu.cn, Tel: 0514-87979300 E-mail:960625033@qq.com
  • About author:朱新开, E-mail: xkzhu@yzu.edu.cn, Tel: 0514-87979300
  • Supported by:

    This research supported by the National Natural Science Foundation of China (31271642), the Special Scientific Research Fund of the Ministry of Agriculture (201503130), the National Key Technology Support Program of China (2013BAD07B09), the University Natural Science Foundation of Jiangsu Province (Key Program 13KJA210004), the Priority Academic Program Development of Jiangsu Higher Education Institutions, and Agricultural Scientific and Technological Key Project of Yangzhou (YZ2014166).


Improvement of utilization rate of nitrogen fertilizer (NUR) is one of research focuses in wheat. In a two-year field experiment, the NUR of wheat variety Guangmingmai 1 in the wheat–rice rotation system in response to sowing date (S), density (D), and nitrogen application rate (N) was studied using a mathematical model based on quadratic regression rotation-orthogonal combination design. Among the three factors, nitrogen application rate had the greatest effects on NUR, followed by sowing date and density. Several S+D+N combinations resulted in high yield and high NUR under the experimental conditions. The highest yield level (6800–7200 kg ha–1) was obtained in the combination of S between October 28 and November 2, D between 1.6 and 1.8 million plants per hectare, and N at 200 kg ha–1. Simultaneously, the NUR was higher than 42.0% (the maximum was 44.8%) with a credibility larger than 95%. At the yield level of 6200–7000 kg ha–1 and NUR higher than 41.0%, the optimal S, D and N were 21–27 October, 1.2–1.5 million plants per hectare and 190–225 kg ha–1, respectively. At the yield level of 5900–7250 kg ha–1 and NUR higher than 39.0%, the agronomic practices were recommended to be S between November 3 and November 11, D between 2.1 and 2.4 million plants per hectare, and N between 190 and 210 kg ha–1.

Key words: Rice–wheat rotation system, Utilization rate of nitrogen fertilizer, Wheat yield, Combination of agronomic practices

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