Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (5): 1099-1112.DOI: 10.1016/S2095-3119(13)60493-1

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Reducing Ammonia Volatilization from Maize Fields with Separation of Nitrogen Fertilizer and Water in an Alternating Furrow Irrigation System

 HAN Kun, ZHOU Chun-ju , WANG Lin-quan   

  1. 1、College of Resources and Environment, Northwest A&F University, Yangling 712100, P.R.China
    2、College of Life Science, Northwest A&F University, Yangling 712100, P.R.China
  • 收稿日期:2012-12-12 出版日期:2014-05-01 发布日期:2014-05-06
  • 通讯作者: WANG Lin-quan, Mobile: 15191910961, E-mail: linquanw@aliyun.com
  • 作者简介:HAN Kun, E-mail: hankun2012@hotmail.com
  • 基金资助:

    This study was supported by the National Natural Science Fundation of China (30571085, 2006), and the Project for Innovative Teams (2010) at Northwest A&F University, China.

Reducing Ammonia Volatilization from Maize Fields with Separation of Nitrogen Fertilizer and Water in an Alternating Furrow Irrigation System

 HAN Kun, ZHOU Chun-ju , WANG Lin-quan   

  1. 1、College of Resources and Environment, Northwest A&F University, Yangling 712100, P.R.China
    2、College of Life Science, Northwest A&F University, Yangling 712100, P.R.China
  • Received:2012-12-12 Online:2014-05-01 Published:2014-05-06
  • Contact: WANG Lin-quan, Mobile: 15191910961, E-mail: linquanw@aliyun.com
  • About author:HAN Kun, E-mail: hankun2012@hotmail.com
  • Supported by:

    This study was supported by the National Natural Science Fundation of China (30571085, 2006), and the Project for Innovative Teams (2010) at Northwest A&F University, China.

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摘要： The objective of this 2-yr field trial, with a central composite rotatable design, was to assess and quantify the effects of separation of nitrogen fertilizer and water with alternating furrow irrigation (SNWAFI) practices on soil ammonia (NH3) emission during the summer maize (Zea mays L.) growing season. Ammonia volatilization after N sidedress and irrigation ranged from 4.8 to 17.0 kg N ha-1 and 6.2 to 20.6 kg N ha-1, respectively, in 2008 and 2009. The lower N input contributed to lower NH3 loss but lower yield, whereas the higher N input induced higher yield as well as higher NH3 loss. Ammonia intensity (NH3 volatilization per crop yield) after N sidedress and irrigation was 1.2-3.0 kg NH3-N t-1 yield in 2008 and 1.1-3.2 kg NH3-N t-1 yield in 2009. The predicted minimum NH3 intensity in 2008 was 1.6 kg NH3-N t-1 yield and was obtained with the combined application of 127 kg N ha-1 and 108 mm irrigation water. In 2009, the predicted minimum NH3 intensity was 1.3 kg NH3-N t-1 yield and was obtained with the combined application of 101 kg N ha-1 and 83 mm irrigation water. We conclude that SNWAFI practices with optimum rates of water and fertilizer can significantly reduce soil NH3 intensity and maintain yield. It was more beneficial for sustainable farming strategies to minimize the NH3 intensity rather than reduce absolute NH3 emissions alone.

关键词: volatilization rate , cumulative volatilization , SNWAFI , CCRD , NH3 intensity

Abstract: The objective of this 2-yr field trial, with a central composite rotatable design, was to assess and quantify the effects of separation of nitrogen fertilizer and water with alternating furrow irrigation (SNWAFI) practices on soil ammonia (NH3) emission during the summer maize (Zea mays L.) growing season. Ammonia volatilization after N sidedress and irrigation ranged from 4.8 to 17.0 kg N ha-1 and 6.2 to 20.6 kg N ha-1, respectively, in 2008 and 2009. The lower N input contributed to lower NH3 loss but lower yield, whereas the higher N input induced higher yield as well as higher NH3 loss. Ammonia intensity (NH3 volatilization per crop yield) after N sidedress and irrigation was 1.2-3.0 kg NH3-N t-1 yield in 2008 and 1.1-3.2 kg NH3-N t-1 yield in 2009. The predicted minimum NH3 intensity in 2008 was 1.6 kg NH3-N t-1 yield and was obtained with the combined application of 127 kg N ha-1 and 108 mm irrigation water. In 2009, the predicted minimum NH3 intensity was 1.3 kg NH3-N t-1 yield and was obtained with the combined application of 101 kg N ha-1 and 83 mm irrigation water. We conclude that SNWAFI practices with optimum rates of water and fertilizer can significantly reduce soil NH3 intensity and maintain yield. It was more beneficial for sustainable farming strategies to minimize the NH3 intensity rather than reduce absolute NH3 emissions alone.

Key words: volatilization rate , cumulative volatilization , SNWAFI , CCRD , NH3 intensity