Knowledge Management System Of Institute Of Botany,CAS
| Autotrophic and heterotrophic respiration of a poplar plantation chronosequence in northwest China | |
| Yan, Meifang1; Guo, Nan; Ren, Hongrui; Zhang, Xinshi1; Zhou, Guangsheng1 | |
| 2015 | |
| 发表期刊 | FOREST ECOLOGY AND MANAGEMENT
 |
| ISSN | 0378-1127 |
| 卷号 | 337页码:119-125 |
| 摘要 | The partitioning of soil respiration is helpful for understanding the mechanism of soil CO2 production and for estimating net forest C budget. We investigated heterotrophic (Rh) and autotrophic (Ra) components of soil CO2 efflux (Rs) in a poplar chronosequence (3-, 8-, and 15-yr-old) using a trenching method in 2007 and 2008. Our results showed that Rh and Ra varied with stand age. Mean Rh increased from 1.85 mu mol m(-2) s(-1) in the 3-yr-old stand to 2.59 mu mol m(-2) s(-1) in the 15-yr-old stand, while Ra decreased from 3.41 mu mol m(-2) s(-1) in the 3-yr-old stand to 1.89 mu mol m(-2) s(-1) in the 15-yr-old stand. There was a significant stand-age effect on Ra. Autotrophic respiration in the three stands all peaked in June, while the maximum Rh and soil temperature occurred in July. The seasonal variations of Ra and Rh could be well explained by soil temperature (P < 0.01). The contribution of Ra to Rs during the growing season was 57.1% averaged over the three stands. We found that Rh was positively correlated with dead fine root biomass (P < 0.01) and with forest floor litter mass (P < 0.05), and that Ra was significantly correlated with live fine root biomass. The root respiration significantly decreased with stand age, which was explained by a decrease in live fine root biomass over the age sequence, whereas the increase of heterotrophic respiration could be attributed predominantly to an increase in the labile C input with stand age. Our results highlight the importance of stand-age effects on different components of soil respiration and its significance to the estimation of forest C sink potential over a rotation. (C) 2014 Elsevier B.V. All rights reserved. |
| 关键词 | Forest ecosystem Poplar plantation Soil CO2 emission Stand age |
| 学科领域 | Forestry |
| DOI | 10.1016/j.foreco.2014.11.009 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | TOTAL SOIL RESPIRATION ; ROOT RESPIRATION ; OAK FOREST ; CARBON ; TEMPERATURE ; COMPONENTS ; RHIZOSPHERE ; EFFLUX ; RATES |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| WOS记录号 | WOS:000348084200013 |
| 出版者 | ELSEVIER |
| 文献子类 | Article |
| 出版地 | AMSTERDAM |
| EISSN | 1872-7042 |
| 资助机构 | Scientific Research Foundation of Taiyuan University of Technology ; Natural Science Foundation of China |
| 作者邮箱 | mfyan2010@aliyun.com |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/25599 |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Taiyuan Univ Technol, Coll Environm Sci & Engn, Taiyuan 030024, Peoples R China 2.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Meifang,Guo, Nan,Ren, Hongrui,et al. Autotrophic and heterotrophic respiration of a poplar plantation chronosequence in northwest China[J]. FOREST ECOLOGY AND MANAGEMENT,2015,337:119-125. |
| APA | Yan, Meifang,Guo, Nan,Ren, Hongrui,Zhang, Xinshi,&Zhou, Guangsheng.(2015).Autotrophic and heterotrophic respiration of a poplar plantation chronosequence in northwest China.FOREST ECOLOGY AND MANAGEMENT,337,119-125. |
| MLA | Yan, Meifang,et al."Autotrophic and heterotrophic respiration of a poplar plantation chronosequence in northwest China".FOREST ECOLOGY AND MANAGEMENT 337(2015):119-125. |
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