| 不同土地利用方式下冬季N2O排放及其影响因素 |
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| 引用本文： | 伍延正,张苗苗,秦红灵,侯海军,陈春兰,魏文学.不同土地利用方式下冬季N2O排放及其影响因素[J].环境科学,2013,34(8):2968-2974. |
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| 作者姓名： | 伍延正 张苗苗 秦红灵 侯海军 陈春兰 魏文学 |
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| 作者单位： | 1. 中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,中国科学院桃源农业生态试验站,长沙410125;中国科学院大学,北京100049
2. 中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,中国科学院桃源农业生态试验站,长沙410125 |
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| 基金项目： | 国家科技支撑计划项目(2012BAD14B17);国家自然科学基金项目(41071181, 31200339) |
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| 摘 要： | 由于冬季气温低,温室气体的排放往往被忽视.而最新研究结果显示,土壤冬季仍然持续排放N2O.研究不同土地利用方式下冬季N2O排放规律对于评估农田土壤N2O排放有重要意义.在中国科学院桃源农业生态试验站选择4种不同的土地利用方式包括冬闲稻田、油菜地、蜜柚园和撂荒地,采用静态箱采集和气相色谱法结合监测N2O排放动态.结果表明,冬闲稻田和油菜地N2O排放量明显高于蜜柚园和撂荒地,其顺序为:油菜地>冬闲稻田>蜜柚园>荒地.N2O的累积排放量分别为0.502、0.392、0.162、0.075 kg·hm-2.冬闲稻田和油菜地的累计排放量占全年排放量的贡献较大而蜜柚园和荒地则较小.相关性分析结果表明,对于不同的土地利用方式,当土壤温度>5℃时,冬季N2O排放通量与土壤温度都有显著指数正相关,而与水分没有相关性.本研究表明,当土壤温度>5℃,土壤温度是冬季桃源不同土地类型N2O排放的主导因素;当土壤温度<5℃时,土壤温度和其他环境因素综合影响了N2O的排放.
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| 关 键 词： | 不同土地利用方式 N2O排放 土壤温度 影响因素 农田土壤 |
| 收稿时间： | 2012/11/21 0:00:00 |
| 修稿时间： | 1/9/2013 12:00:00 AM |
N2O Flux in Winter and Its Affecting Factors Under Different Land Use Patterns |
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| WU Yan-zheng,ZHANG Miao-miao,QIN Hong-ling,HOU Hai-jun,CHEN Chun-lan and WEI Wen-xue.N2O Flux in Winter and Its Affecting Factors Under Different Land Use Patterns[J].Chinese Journal of Environmental Science,2013,34(8):2968-2974. |
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| Authors: | WU Yan-zheng ZHANG Miao-miao QIN Hong-ling HOU Hai-jun CHEN Chun-lan and WEI Wen-xue |
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| Institution: | Key Laboratory of Agro-ecological Processes in Subtropical Regionsm Taoyuan Station of Agro-ecology Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125,China;University of Chinese Academy of Sciences, Beijing 100049,China;Key Laboratory of Agro-ecological Processes in Subtropical Regionsm Taoyuan Station of Agro-ecology Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125,China;University of Chinese Academy of Sciences, Beijing 100049,China;Key Laboratory of Agro-ecological Processes in Subtropical Regionsm Taoyuan Station of Agro-ecology Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125,China;Key Laboratory of Agro-ecological Processes in Subtropical Regionsm Taoyuan Station of Agro-ecology Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125,China;Key Laboratory of Agro-ecological Processes in Subtropical Regionsm Taoyuan Station of Agro-ecology Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125,China;Key Laboratory of Agro-ecological Processes in Subtropical Regionsm Taoyuan Station of Agro-ecology Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125,China |
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| Abstract: | |
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| Keywords: | different land use patterns N2O emissions soil temperature impact factor agriculture soil |
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