Land-use impact on soil carbon and nitrogen sequestration in typical steppe ecosystems, Inner Mongolia
文献类型：SCI/SSCI论文
| 作者 | He N. P. ; Zhang Y. H. ; Dai J. Z. ; Han X. G. ; Baoyin T. G. T. ; Yu G. R. |
| 发表日期 | 2012 |
| 关键词 | carbon grazing land-use nitrogen reclamation soil fractions particle-size fractions organic-matter northern china arid ecosystems grassland storage management dynamics cultivation intensity |
| 英文摘要 | To explore the optimal land-use for soil carbon (C) sequestration in Inner Mongolian grasslands, we investigated C and nitrogen (N) storage in soil and soil fractions in 8 floristically and topographically similar sites which subjected to different land-use types (free-grazing, grazing exclusion, mowing, winter grazing, and reclamation). Compared with free-grazing grasslands, C and N storage in the 0-50 cm layer increased by 18.3% (15.5 Mg C ha(-1)) and 9.3% (0.8 Mg N ha(-1)) after 10-yr of grazing exclusion, respectively, and 21.9% (18.5 Mg C ha(-1)) and 11.5% (0.9 Mg N ha(-1)) after 30-yr grazing exclusion, respectively. Similarly, soil C and N storage increased by 15.3% (12.9 Mg C ha(-1)) and 10.2% (0.8 Mg N ha(-1)) after 10-yr mowing, respectively, and 19.2% (16.2 Mg C ha(-1)) and 7.1% (0.6 Mg N ha(-1)) after 26-yr mowing, respectively. In contrast, soil C and N storage declined by 10.6% (9.0 Mg C ha(-1)) and 11.4% (0.9 Mg N ha(-1)) after 49-yr reclamation, respectively. Moreover, increases in C and N storage mainly occurred in sand and silt fractions in the 0-10 cm soil layer with grazing exclusion and mowing. Our findings provided evidence that Inner Mongolian grasslands have the capacity to sequester C and N in soil with improved management practices, which were in the order: grazing exclusion > mowing > winter grazing > reclamation. |
| 出处 | Journal of Geographical Sciences |
| 卷 | 22 |
| 期 | 5 |
| 页 | 859-873 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1009-637X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30862]  |
| 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.,Zhang Y. H.,Dai J. Z.,et al. Land-use impact on soil carbon and nitrogen sequestration in typical steppe ecosystems, Inner Mongolia. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
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