| 下辽河平原潮棕壤撂荒地和人工林N2O、CH4排放研究 |
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| 引用本文： | 王重阳,郑靖,顾江新,史奕,陈欣. 下辽河平原潮棕壤撂荒地和人工林N2O、CH4排放研究[J]. 土壤, 2007, 39(6): 863-869 |
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| 作者姓名： | 王重阳 郑靖 顾江新 史奕 陈欣 |
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| 作者单位： | 1. 中国科学院沈阳应用生态研究所陆地生态过程重点实验室,沈阳,110016
2. 中国科学院大气物理研究所,北京,100029 |
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| 基金项目： | 国家自然科学基金;中国科学院创新工程项目 |
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| 摘 要： | 采用静态箱(暗箱)气相色谱法对下辽河平原潮棕壤撂荒地和人工林N2O、CH4排放进行了为期1年的原位测量,同时测量了土壤温湿度、气温,土壤NO3-N、NH4 -N含量等相关因子.结果表明,在观测期间内人工林地土壤的N2O排放通量明显高于撂荒地.撂荒地是大气CH4的源,而人工林则是CH4的汇.对人工林的观测结果表明,N2哦O排放与CH4排放之间存在负相关关系(R2=-0.351,p＜0.05,n=36);而撂荒地两种气体排放之间无明显相关关系.N2O排放通量和温度变化有很好的相关性.当土壤含水量在200 g/kg以上时,土壤含水量与CH4气体排放具有较好的正相关关系.
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| 关 键 词： | 撂荒地 人工林 影响因子 |
N2O and CH4 Emissions from Abandoned Land and Artificial Poplar Forest in Aquic Brown Soil in the Lower Reaches of Liaohe Plain |
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| WANG Chong-yang,ZHENG Jing,GU Jiang-xin,SHI Yi and CHEN Xin. N2O and CH4 Emissions from Abandoned Land and Artificial Poplar Forest in Aquic Brown Soil in the Lower Reaches of Liaohe Plain[J]. Soils, 2007, 39(6): 863-869 |
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| Authors: | WANG Chong-yang ZHENG Jing GU Jiang-xin SHI Yi CHEN Xin |
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| Affiliation: | Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China,Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China,Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China and Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | The N_2O and CH_4 emission fluxes from abandoned land and artificial poplar forest in aquic brown soil were measured by static closed chamber-gas chromatograph (GC) technique from Oct. 2003 to Oct. 2004. The soil temperature, soil moisture, soil content of NO3- -N and NH4 -N were observed at the same time. The results showed that abandoned land was the source of atmospheric CH_4, on the other hand, artificial poplar forest was the sink of CH_4. During the observation period, the N_2O emission flux in artificial forest was higher than that in abandoned land. There was a remarkable negative correlation between CH_4 and N_2O emission in artificial forest, but it was not evident in abandoned land. It also showed that N_2O emission flux changed with the temperature variation. When the soil moisture was higher than 200g/kg, there was a significant correlation between soil moisture and the emission of CH_4 in the study fields. |
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| Keywords: | N2O CH4 |
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