Warming and increased precipitation individually influence soil carbon sequestration of Inner Mongolian grasslands, China
文献类型：SCI/SSCI论文
| 作者 | He N. P. ; Chen Q. S. ; Han X. G. ; Yu G. R. ; Li L. H. |
| 发表日期 | 2012 |
| 关键词 | Precipitation Carbon Nitrogen Soil fraction Temperate grassland Warming elevated co2 northern china organic-carbon climate-change terrestrial ecosystems temperate grassland semiarid grassland nitrogen responses dynamics |
| 英文摘要 | The impact of climate change (i.e. warming and changes in precipitation patterns) on carbon (C) sequestration in the continental steppe is currently disputed and uncertain. We conducted a six-year field experiment in the temperate grassland ecosystem in Inner Mongolia, China. We found that C storage in the 0-30 cm soil layer significantly decreased by 129.3 g C m(-2) under warming (W) but significantly increased by 145.9 g C m(-2) with increased precipitation (P), with no apparent interaction of W x P. The effects of W and P on soil C sequestration varied in different soil fractions (labile vs. recalcitrant soil organic matter) and layers (topsoil vs. subsoil), which complicated the prediction of the short- and long-term effects of soil C sequestration in climate change scenarios. Furthermore, C:nitrogen (N) ratios in soils with increasing C and N were asynchronous under W, P, and W + P treatments, suggesting that the limiting effect of N on soil C sequestration would be intensified under W with P conditions. Our findings suggest that, without an increase in precipitation or concurrent P and W, the semiarid Inner Mongolian grasslands may potentially act as a net C source in the future. (C) 2012 Elsevier B.V. All rights reserved. |
| 出处 | Agriculture Ecosystems & Environment |
| 卷 | 158 |
| 页 | 184-191 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0167-8809 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30863]  |
| 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 | He N. P.,Chen Q. S.,Han X. G.,et al. Warming and increased precipitation individually influence soil carbon sequestration of Inner Mongolian grasslands, China. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
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