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应用生态学报 ›› 2001, Vol. 12 ›› Issue (6): 917-922.

• 研究论文 • 上一篇    下一篇

应用DNDC模型分析施肥和翻耕方式变化对旱田土壤N2O释放的潜在影响

徐文彬, 刘维屏, 刘广深   

  1. 浙江大学环境科学研究所, 杭州, 310027
  • 收稿日期:1999-01-20 修回日期:1999-12-13 出版日期:2001-11-25 发布日期:2001-11-25
  • 基金资助:

    国家自然科学基金(49873034,40073034)和中国博士后科学基金资助项目.

Potential effect of fertilising and tilling on N2O emission from upland soils analyzed by DNDC model

XU Wenbin, LIU Weiping, LIU Guangshen   

  1. Institute of Environmental Science, Zhejiang University, Hangzhou 310027
  • Received:1999-01-20 Revised:1999-12-13 Online:2001-11-25 Published:2001-11-25

摘要: 以贵州省玉米-油菜轮作田和大豆-冬小麦轮作田为N2O释放通量测量对象,根据DNDC模型能较好地拟合田间N2O释放通量季节变化及施肥和翻耕对释放的影响,采用DNDC模型定量探讨了上述作物生长季节有机肥施用量、N肥施用量及施肥日期、N肥类型和施肥深度、翻耕深度和翻耕日期等变化对亚热带旱田生态系统N2O释放的潜在影响.为今后通过改变施肥和耕作方式来控制农业土壤N2O释放量提供研究基础和参考.

Abstract: A corn-rape and a soybean-winter wheat rotation field in Guizhou Province were selected to measure N2O fluxes from sub-tropical upland soils.Based on the function of the DNDC model in well elucidating the seasonal changes of N2O flux and the effects of fertilising and tilling on them,it was thus used to assess the potential effect of variations in application of manure and N-fertilisers,fertilising timing,N-fertiliser types,fertilising depth,and tillage on N2O fluxes from sub-tropical upland soils.The results could be used to enact relevant policies,and to explore the potential for controlling N2O emissions from agricultural soils by changing fertilising and tilling.

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