Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau
文献类型：SCI/SSCI论文
| 作者 | Du Y. G. ; Cui Y. G. ; Xu X. L. ; Liang D. Y. ; Long R. J. ; Cao G. M. |
| 发表日期 | 2008 |
| 关键词 | nitrous oxide Kobresia humilis meadow Potentilla fruticosa meadow Tibetan Plateau soil moisture soil temperature agricultural soils n2o emissions grassland ch4 co2 ecosystem respiration temperature management atmosphere |
| 英文摘要 | Nitrous oxide (N(2)O) emission was measured in a Kobresia humilis meadow and a Potentilla fruticosa meadow in the Qinghai-Tibet Plateau from June 2003 to July 2006. Five treatments were setup in the two alpine meadows. Two bare soil treatments were setup in the K. humilis meadow (BSK) and in the P. fruticosa meadow (BSP) by removing the above- and belowground plant biomass. Three plant community treatments were setup with one in the K. humilis meadow (herbaceous community in the K. humilis meadow-HCK) and two in the P. fruticosa meadow (herbaceous community in the P. fruticosa meadow-HCP, and shrub community in the P. fruticosa meadow-SCP). Nitrous oxide emission from BSP was estimated to be 38.1 +/- 3.6 mu g m(-2) h(-1), significantly higher than from BSK (30.2 +/- 2.8 mu g m(-2) h(-1)) during the whole experiment period. Rates from the two herbaceous blocks (HCK and HCP) were close to 39.5 mu g m(-2) stop h(-1) during the whole experimental period whereas shrub community (SCP) showed significant high emission rates of N(2)O. Annual rate of N(2)O emission was estimated to be 356.7 +/- 8.3 and 295.0 +/- 11.6 mg m(-2) year(-1) from the alpine P. fruticosa meadow and from the alpine K. humilis meadow, respectively. These results suggest that alpine meadows in the Qinghai-Tibetan Plateau are an important source of N(2)O, contributing an average of 0.3 Tg N(2)O year(-1). We concluded that N(2)O emission will decrease, due to a predicted vegetation shift from shrubs to grasses imposed by overgrazing. |
| 出处 | Plant and Soil |
| 卷 | 311 |
| 期 | 1-2 |
| 页 | 245-254 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0032-079X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/24102]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Du Y. G.,Cui Y. G.,Xu X. L.,et al. Nitrous oxide emissions from two alpine meadows in the Qinghai-Tibetan Plateau. 2008. |
入库方式： OAI收割
来源：地理科学与资源研究所
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