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

摘要/Abstract

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.

关键词: N₂O释放, 施肥, 翻耕, 旱田土壤, DNDC模型

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.

Key words: N₂O emission, Fertilising, Tilling, Upland soils, DNDC model

中图分类号:

X171.5

徐文彬, 刘维屏, 刘广深. 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[J]. 应用生态学报, 2001, (6): 917-922.

XU Wenbin, LIU Weiping, LIU Guangshen. Potential effect of fertilising and tilling on N₂O emission from upland soils analyzed by DNDC model[J]. Chinese Journal of Applied Ecology, 2001, (6): 917-922.

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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

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

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