(13)C abundance, water-soluble and microbial biomass carbon as potential indicators of soil organic carbon dynamics in subtropical forests at different successional stages and subject to different nitrogen loads
文献类型：SCI/SSCI论文
| 作者 | Fang H. J. ; Yu G. R. ; Cheng S. L. ; Mo J. M. ; Yan J. H. ; Li S. G. |
| 发表日期 | 2009 |
| 关键词 | N deposition (13)C natural abundance Labile C fractions SOC turnover Successional stages Subtropical China atmospheric nitrate deposition southern appalachian mountains particle-size fractions simulated n deposition loblolly-pine litter decomposition inorganic nitrogen temperate forests tropical forest isotope ratios |
| 英文摘要 | Chronic atmospheric nitrogen deposition affects the cycling of carbon (C) and nitrogen (N) in forest ecosystems, and thereby alters the stable C isotopic abundance of plant and soil. Three successional stages, disturbed, rehabilitated and mature forests were studied for their responses to different nitrogen input levels. N-addition manipulative experiments were conducted at low, medium and high N levels. To study the responses of C cycling to N addition, the C concentration and (13)C natural abundances for leaf, litter and soil were measured. Labile organic carbon fractions in mineral soils were measured to quantify the dynamics of soil organic C (SOC). Results showed that three-year continuous N addition did not significantly increase foliar C and N concentration, but decreased C/N ratio and enriched (13)C in N-rich forests. In addition, N addition significantly decreased microbial biomass C, and increased water soluble organic C in surface soils of N-rich forests. This study suggests that N addition enhances the water consumption per unit C assimilation of dominant plant species, restricts SOC turnover in N-poor forests at early and medium successional stages (thus favored SOC sequestration), and vice versa for N-rich mature forests. |
| 出处 | Plant and Soil |
| 卷 | 320 |
| 期 | 1-2 |
| 页 | 243-254 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0032-079X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/24063]  |
| 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 | Fang H. J.,Yu G. R.,Cheng S. L.,et al. (13)C abundance, water-soluble and microbial biomass carbon as potential indicators of soil organic carbon dynamics in subtropical forests at different successional stages and subject to different nitrogen loads. 2009. |
入库方式： OAI收割
来源：地理科学与资源研究所
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