| 降雨和土壤湿度对贵州旱田土壤N2O释放的影响 |
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| 引用本文： | 徐文彬,刘广深,刘维屏.降雨和土壤湿度对贵州旱田土壤N2O释放的影响[J].应用生态学报,2002,13(1):67-70. |
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| 作者姓名： | 徐文彬 刘广深 刘维屏 |
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| 作者单位： | 浙江大学环境科学研究所,杭州,310027 |
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| 基金项目： | 国家自然科学基金资助项目 ( 4 9873034，40 0 730 34) |
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| 摘 要： | 以南方亚热带代表性旱田土壤-贵州玉米-油菜轮作田、大豆-冬小麦轮作田和休耕地为观测对象，研究土壤N2O释放通量季节变化与降雨和土壤湿度的关系，同时，采用DNDC模型定量探讨了未来降雨量变化对土壤N2O释放的潜在影响，结果表明，降雨与N2O释放峰间存在明显的驱动-响应关系，N2O释放通量与降雨量和土壤湿度间存在正相关性，模型检验结果表明，夏秋季土壤N2O释放通量与降雨量变化呈正相关，而降雨量的大幅度增加或下降将引起冬春季土壤N2O释放通量的微弱下降。
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| 关 键 词： | N2O释放 降雨 土壤湿度 旱田土壤 DNDC模型 贵州 |
| 文章编号： | 1001-9332(2002)01-0067-04 |
| 修稿时间： | 1999年12月13 |
Effects of precipitation and soil moisture on N2O emissions from upland soils in Guizhou. |
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| XU Wenbin,LIU Guangshen and LIU Weibing.Effects of precipitation and soil moisture on N2O emissions from upland soils in Guizhou.[J].Chinese Journal of Applied Ecology,2002,13(1):67-70. |
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| Authors: | XU Wenbin LIU Guangshen and LIU Weibing |
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| Institution: | Institute of Environmental Science, Zhejiang University, Hangzhou 310027. xuwenbin@163.net |
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| Abstract: | Soils of corn-rape seed rotation,soybean-winter wheat rotation and fallow land in Guizhou were representatively selected to study effects of precipitation and soil moisture on N-2O emissions.Furthermore,DNDC model was used to assess the potential effects of variations in precipitation in future on N-2O emissions from above lands.The results indicated that N-2O emission pulses were obviously driven by rainfall and N-2O fluxes were correlated positively with precipitation and soil moisture.The results from DNDC modeling showed that N-2O fluxes from soils in summer and autumn would be correlated positively with precipitation,but N-2O fluxes in winter and spring would slightly decrease with great change of precipitation. |
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| Keywords: | N-2O Precipitation Soil moisture Upland soils DNDC model |
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