Patterns of SOC and soil C-13 and their relations to climatic factors and soil characteristics on the Qinghai-Tibetan Plateau
文献类型：SCI/SSCI论文
| 作者 | Wang S. Q. ; Fan J. W. ; Song M. H. ; Yu G. R. ; Zhou L. ; Liu J. Y. ; Zhong H. P. ; Gao L. P. ; Hu Z. M. ; Wu W. X. ; Song T. |
| 发表日期 | 2013 |
| 关键词 | Soil organic carbon Soil delta C-13 Climate factors Soil characteristic Qinghai-Tibetan Plateau carbon-isotope composition differently textured soils organic-matter fractions woody plant invasion density fractions forest soils land-use dynamics grasslands china |
| 英文摘要 | SOC inventory and soil delta C-13 were widely used to access the size of soil C pool and to indicate the dynamics of C input and output. The effects of climatic factors and soil physical characteristics and plant litter input on SOC inventory and soil delta C-13 were analyzed to better understand the dynamics of carbon cycling across ecosystems on the Qinghai-Tibetan Plateau. Field investigation was carried out along the two transects with a total of 1,875 km in length and 200 km in width. Sixty-two soil profiles, distributed in forest, meadow, steppe, and cropland, were stratified sampled every 10 cm from 0 to 40 cm. Our result showed that SOC density in forest and meadows were much higher than in steppe and highland barley. In contrast, delta C-13 in forest and meadow were lower than in steppe and highland barley. Soil delta C-13 tended to enrich with increasing soil depth but SOC decline. SOC and delta C-13 (0-40 cm) were correlated with different climatic factors in different ecosystems, such that SOC correlated negatively with MAT in meadow and positively with MAP in steppe; delta C-13 correlated positively with MAT in meadow and steppe; and delta C-13 also tended to increase with increasing MAT in forest. Of the variation of SOC, 55.15 % was explained by MAP, pH and silt content and 4.63 % was explained by the interaction between MAT and pH across all the ecosystems except for the cropland. Meanwhile, SOC density explained 27.40 % of variation of soil delta C-13. It is suggested that different climatic factors controlled the size of the soil C pool in different ecosystems on the Tibetan Plateau. SOC density is a key contributor to the variation of soil delta C-13. |
| 出处 | Plant and Soil |
| 卷 | 363 |
| 期 | 1-2 |
| 页 | 243-255 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0032-079X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30194]  |
| 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 | Wang S. Q.,Fan J. W.,Song M. H.,et al. Patterns of SOC and soil C-13 and their relations to climatic factors and soil characteristics on the Qinghai-Tibetan Plateau. 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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