Plant clipping may cause overestimation of soil respiration in a Tibetan alpine meadow, southwest China
文献类型：期刊论文
| 作者 | Li, Guoyong ; Sun, Shucun |
| 刊名 | ECOLOGICAL RESEARCH
 |
| 出版日期 | 2011 |
| 卷号 | 26期号:3页码:497-504 |
| 关键词 | Soil respiration Chamber-based techniques Soil temperature Plant clipping Grassland |
| ISSN号 | 0912-3814 |
| 产权排序 | 1 |
| 通讯作者 | Sun, SC (reprint author), Nanjing Univ, Dept Biol, 22 Hankou Rd, Nanjing 210093, Peoples R China. |
| 英文摘要 | The chamber-based method is currently the most popular approach used for measuring soil respiration of various ecosystems. When this method is applied, aboveground plant tissues within the chamber need to be clipped some time (usually 24 h) before measuring soil respiration. However, plant clipping may change soil temperature and hence soil respiration because soil respiration is highly temperature-dependent, particularly in cold regions. To determine to what extent soil respiration may be changed by the clipping, we measured soil temperature and respiration of an alpine meadow of southwest China using a chamber-based method over an annual cycle. Based on the measurements, an exponential equation was built to describe the relationship between soil respiration and temperature. Concurrently we measured the soil temperature in clipped and unclipped plots on sunny days of the study months in another independent experiment; subsequently soil respiration was estimated for these plots using the exponential equation. Though daily mean soil temperature was insignificantly different between the clipped and unclipped plots, the clipping increased soil temperature at 5 cm depth by up to 4.3A degrees C at daytime but decreased by up to 1.4A degrees C at nighttime during the growing season. The changes were 2.2 and 1.5A degrees C at daytime and nighttime, respectively, in the non-growing season. It was calculated that the clipping manipulation caused an overestimation of soil respiration by 28.6 and 21.2% for the growing and non-growing seasons, respectively; nevertheless, this calculated overestimation should differ from the actual one because the data were collected on sunny days only. |
| 学科主题 | Environmental Sciences & Ecology |
| 收录类别 | SCI |
| 资助信息 | National Science Foundation of China[30670333]; Chinese Academy of Sciences[KZCX2-XB2-02]; ECORES lab of Sichuan Province; CAS |
| 语种 | 英语 |
| WOS记录号 | WOS:000290538900003 |
| 公开日期 | 2012-11-09 |
| 源URL | [http://210.75.237.14/handle/351003/23450]  |
| 专题 | 成都生物研究所_生态研究 |
| 推荐引用方式 GB/T 7714 | Li, Guoyong,Sun, Shucun. Plant clipping may cause overestimation of soil respiration in a Tibetan alpine meadow, southwest China[J]. ECOLOGICAL RESEARCH,2011,26(3):497-504. |
| APA | Li, Guoyong,&Sun, Shucun.(2011).Plant clipping may cause overestimation of soil respiration in a Tibetan alpine meadow, southwest China.ECOLOGICAL RESEARCH,26(3),497-504. |
| MLA | Li, Guoyong,et al."Plant clipping may cause overestimation of soil respiration in a Tibetan alpine meadow, southwest China".ECOLOGICAL RESEARCH 26.3(2011):497-504. |
入库方式： OAI收割
来源：成都生物研究所
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