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Chinese Journal of Applied Ecology ›› 2016, Vol. 27 ›› Issue (9): 3051-3058.doi: 10.13287/j.1001-9332.201609.022

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Research advances on regulating soil nitrogen loss by the type of nitrogen fertilizer and its application strategy.

ZHOU Wei1,2, LYU Teng-fei1,3, YANG Zhi-ping1,2, SUN Hong1,2, YANG Liang-jie1,2, CHEN Yong1,2, REN Wan-jun1,2*   

  1. 1Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Wenjiang 611130, Sichuan, China;
    2College of Agronomy, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China;
    3Rice Research Institute, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China
  • Received:2016-02-04 Published:2016-09-18
  • Contact: * E-mail: rwjun@126.com
  • Supported by:
    This work was supported by the Science and Technology Project for Food Production of China (2013BAD07B13-02, 2011BAD16B05) and the special fund for the Scientific Research in the Public Interest of China (Agriculture) (201303129)

Abstract: Unreasonable application of nitrogen fertilizer to cropland decreases nitrogen use efficiency of crop. A large amount of nitrogen loss to environment through runoff, leaching, ammonia volati-lization, nitrification-denitrification, etc., causes water and atmospheric pollution, poses serious environmental problems and threatens human health. The type of nitrogen fertilizer and its application rate, time, and method have significant effects on nitrogen loss. The primary reason for nitrogen loss is attributed to the supersaturated soil nitrogen concentration. Making full use of environmental nitrogen sources, reducing the application rate of chemical nitrogen fertilizers, applying deep placement fertilizing method, and applying organic fertilizers with chemical nitrogen fertilizers, are effective practices for reducing nitrogen loss and improving nitrogen use efficiency. It is suggested that deve-loping new high efficiency nitrogen fertilizers, enhancing nitrogen management, and strengthening the monitoring and use of environmental nitrogen sources are the powerful tools to decrease nitrogen application rate and increase efficiency of cropland.