Responses of soil respiration and its temperature sensitivity to thinning in a pine plantation
文献类型：期刊论文
| 作者 | Pang, Xueyong ; Bao, Weikai ; Zhu, Biao ; Cheng, Weixin |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2013 |
| 卷号 | 171页码:57-64 |
| 关键词 | Soil respiration Temperature sensitivity Q(10) Thinning Forest gap Pine plantation |
| ISSN号 | 0168-1923 |
| 产权排序 | 1 |
| 通讯作者 | Bao, WK (reprint author), Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China. |
| 英文摘要 | Understanding the effects of forest management practice on soil respiration (R-s) and its temperature sensitivity (Q(10)) is crucial for the accurate estimation of the global carbon budget. However, the dynamics of R-s and Q(10) resulting from plantation thinning are not well understood. To evaluate the impacts of forest thinning on R-s and Q(10), we selected a pine plantation in the eastern Tibetan Plateau and applied the technique of thinning by simulating gap formation. We measured R-s monthly before (from July to November 2008) and after (from December 2008 to June 2012) thinning, combining with monthly microclimatic factors. R, showed significant seasonal variability (P<0.001) in both control (0.30 +/- 0.05 to 2.94 +/- 0.29 mu mol C m(-2) s(-1)) and thinned (0.25 +/- 0.04 to 2.99 +/- 0.08 mu mol C m(-2) s(-1)) stands, with higher rates from July to September and lower rates from December to February. These seasonal dynamics were primarily driven by soil temperature rather than by moisture limitation, except during an especially dry season, when soil moisture significantly affected R-s. There were significant differences in R-s during the growing season between the control and thinned sites following thinning. R-s increased at the thinned sites compared with the control sites during the summer of the first and the third year following thinning; however, R-s decreased at the thinned sites in the second summer. This suggested that climatic variability, such as change in soil moisture induced from thinning, played an important role in controlling R-s. There was no significant difference (P=0.083) in R-s between control and thinned treatments after thinning (December 2008 to June 2012). For example, averages of R-s were 1.19 +/- 0.34, 1.20 +/- 0.36, 1.16 +/- 0.38 mu mol C m(-2) s(-1) in the control, small gap and intermediate gap treatments, respectively. In addition, the short-term Q(10) showed a significantly seasonal variability (P<0.001) and was altered by thinning (P=0.048). The long-term Q(10) also showed a significant inter-annual variability (P < 0.001), while thinning did not affect it. During the study period (December 2008 to June 2012), the Q(10) values for the small and intermediate gaps significantly increased by 13.9% and 25.9% (P< 0.05), respectively, compared with the control. These results suggest that the forest thinning by simulating natural gap formation has a relatively small impact on soil CO2 emission and its temperature sensitivity in comparison to the greater influence of inter-annual climatic variability. (C) 2012 Elsevier B.V. All rights reserved. |
| 学科主题 | Agriculture; Forestry; Meteorology & Atmospheric Sciences |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000316513000006 |
| 公开日期 | 2014-11-21 |
| 源URL | [http://210.75.237.14/handle/351003/24233]  |
| 专题 | 成都生物研究所_生态研究 |
| 推荐引用方式 GB/T 7714 | Pang, Xueyong,Bao, Weikai,Zhu, Biao,et al. Responses of soil respiration and its temperature sensitivity to thinning in a pine plantation[J]. AGRICULTURAL AND FOREST METEOROLOGY,2013,171:57-64. |
| APA | Pang, Xueyong,Bao, Weikai,Zhu, Biao,&Cheng, Weixin.(2013).Responses of soil respiration and its temperature sensitivity to thinning in a pine plantation.AGRICULTURAL AND FOREST METEOROLOGY,171,57-64. |
| MLA | Pang, Xueyong,et al."Responses of soil respiration and its temperature sensitivity to thinning in a pine plantation".AGRICULTURAL AND FOREST METEOROLOGY 171(2013):57-64. |
入库方式： OAI收割
来源：成都生物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。