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Chinese Journal of Applied Ecology ›› 2018, Vol. 29 ›› Issue (12): 4063-4070.doi: 10.13287/j.1001-9332.201812.023

• Research paper • Previous Articles     Next Articles

Impact of fertilization on ammonia volatilization and N2O emissions in an open vegetable field

ZHENG Lei1,2, WANG Xue-dong1, GUO Li-ping2*, ZHANG Xin-yue2, WANG Dong-yan2, NIU Xiao-guang2, YUN An-ping2, LI Ying-chun2   

  1. 1College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China;
    2Institute of Environment and Sustainable Deve-lopment in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2018-05-03 Revised:2018-10-09 Online:2018-12-20 Published:2018-12-20
  • Supported by:

    This work was supported by the National Key Research and Development Projects (2017YFD0200106,2016YFD0800105).

Abstract: A field experiment with different nitrogen fertilization rates and mitigation measures was conducted in an open-ground vegetable field on the North China Plain to investigate the effects of nitrogen application level and management practices on ammonia volatilization and N2O emission. Reducing the nitrogen fertilization rate by 20% and by 50% decreased ammonia volatilization by 25.7% and 48.0%, respectively, during the spring-sowed cucumber growth period. Amendment with combined inhibitors and biochar decreased ammonia volatilization loss by 10.0% and 6.1%, respectively. Reducing nitrogen fertilization rate by 20% and 50% decreased N2O emission by 28.8% and 61.0% during the spring-sowed cucumber growth period. Addition of combined inhibitors decreased N2O emission by 58.9%, while it was increased by 14.1% with biochar addition. Under the same application method of banding application, replacing 30% nitrogen fertili-zer with organic manure did not show any significant mitigation for ammonia volatilization and N2O emission. For the intensively managed vegetable fields, reducing the nitrogen application rate appropriately was the most effective measure to reduce ammonia volatilization and N2O emission.