Changes in soil microbial biomass carbon and enzyme activities under elevated CO2 affect fine root decomposition processes in a Mongolian oak ecosystem
文献类型：期刊论文
| 作者 | Li, Xuefeng2; Han, Shijie2; Guo, Zhongling1; Shao, Diankun1; Xin, Lihua2 |
| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2010-07-01 |
| 卷号 | 42期号:7页码:1101-1107 |
| 关键词 | Elevated Co2 Fine Root Decomposition Soil Microbial Biomass Carbon Soil Microbial Biomass Nitrogen Enzyme Activities Mongolian Oak |
| ISSN号 | 0038-0717 |
| DOI | 10.1016/j.soilbio.2010.03.007 |
| 英文摘要 | The relationships between soil microbial properties and fine root decomposition processes under elevated CO2 are poorly understood. To address this question, we determined soil microbial biomass carbon (SMB-C) and nitrogen (SMB-N), enzymes related to soil carbon (C) and nitrogen (N) cycling, the abundance of cultivable N-fixing bacteria and cellulolytic fungi, fine root organic matter, lignin and holocellulose decomposition, and N mineralization from 2006 to 2007 in a Mongolian oak (Quercus mongolica Fischer ex Ledebour) ecosystem in northeastern China. The experiment consisted of three treatments: elevated CO2 chambers, ambient CO2 chambers, and chamberless plots. Fine roots had significantly greater organic matter decomposition rates under elevated CO2. This corresponded with significantly greater SMB-C. Changes in the activities of protease and phenol oxidase under elevated CO2 could not explain the changes in fine root N release and lignin decomposition rates, respectively, while holocellulose decomposition rate had the same response to experimental treatments as did cellulase activity. Changes in cultivable N-fixing bacterial and cellulolytic fungal abundances in response to experimental treatments were identical to those of N mineralization and lignin decomposition rates, respectively, suggesting that the two indices were closely related to fine root N mineralization and lignin decomposition. Our results showed that the increased fine root organic matter, lignin and holocellulose decomposition, and N mineralization rates under elevated CO2 could be explained by shifts in SMB-C and the abundance of cellulolytic fungi and N-fixing bacteria. Enzyme activities are not reliable for the assessment of fine root decomposition and more attention should be given to the measurement of specific bacterial and fungal communities. (C) 2010 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000278579900012 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://210.72.129.5/handle/321005/121567]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Li, Xuefeng |
| 作者单位 | 1.Beihua Univ, Dept Forestry, Beijing 132013, Jilin, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, Forestry Ctr, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xuefeng,Han, Shijie,Guo, Zhongling,et al. Changes in soil microbial biomass carbon and enzyme activities under elevated CO2 affect fine root decomposition processes in a Mongolian oak ecosystem[J]. SOIL BIOLOGY & BIOCHEMISTRY,2010,42(7):1101-1107. |
| APA | Li, Xuefeng,Han, Shijie,Guo, Zhongling,Shao, Diankun,&Xin, Lihua.(2010).Changes in soil microbial biomass carbon and enzyme activities under elevated CO2 affect fine root decomposition processes in a Mongolian oak ecosystem.SOIL BIOLOGY & BIOCHEMISTRY,42(7),1101-1107. |
| MLA | Li, Xuefeng,et al."Changes in soil microbial biomass carbon and enzyme activities under elevated CO2 affect fine root decomposition processes in a Mongolian oak ecosystem".SOIL BIOLOGY & BIOCHEMISTRY 42.7(2010):1101-1107. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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