Nitrogen deposition and carbon sequestration in alpine meadows
文献类型：SCI/SSCI论文
| 作者 | Xu X. L. ; Ouyang H. ; Cao G. M. ; Pei Z. Y. ; Zhou C. P. |
| 发表日期 | 2004 |
| 关键词 | alpine meadows C sequestration N deposition soil CO2 emission microbial biomass nitrogen boreal forest ecosystems soil-nitrogen terrestrial ecosystems litter decomposition atmospheric carbon direct extraction site fertility foliar litter leaf-litter |
| 英文摘要 | Nitrogen deposition experiments were carried out in alpine meadow ecosystems in Qinghai-Xizang Plateau in China, in order to explore the contribution of nitrogen deposition to carbon sequestration in alpine meadows. Two methods were used in this respect. First, we used the allocation of N-15 tracer to soil and plant pools. Second, we used increased root biomass observed in the nitrogen-amended plots. Calculating enhanced carbon storage, we considered the net soil CO2 emissions exposed to nitrogen deposition in alpine meadows. Our results show that nitrogen deposition can enhance the net soil CO2 emissions, and thus offset part of carbon uptake by vegetation and soils. It means that we have to be cautious to draw a conclusion when we estimate the contribution of nitrogen deposition to carbon sequestration based on the partitioning of N-15 tracer in terrestrial ecosystems, in particular in N-limited ecosystems. Even if we assess the contribution of nitrogen deposition to carbon sequestration based on increased biomass exposed to nitrogen deposition in terrestrial ecosystems, likewise, we have to consider the effects of nitrogen deposition on the soil CO2 emissions. |
| 出处 | Biogeochemistry |
| 卷 | 71 |
| 期 | 3 |
| 页 | 353-369 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0168-2563 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22655]  |
| 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 | Xu X. L.,Ouyang H.,Cao G. M.,et al. Nitrogen deposition and carbon sequestration in alpine meadows. 2004. |
入库方式： OAI收割
来源：地理科学与资源研究所
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