Spatial changes in soil organic carbon density and storage of cultivated soils in China from 1980 to 2000
文献类型：期刊论文
| 作者 | Yu, Yanyan1,2; Guo, Zhengtang1; Wu, Haibin1; Kahmann, Julia A.1,3; Oldfield, Frank4 |
| 刊名 | GLOBAL BIOGEOCHEMICAL CYCLES
 |
| 出版日期 | 2009-06-20 |
| 卷号 | 23 |
| ISSN号 | 0886-6236 |
| DOI | 10.1029/2008GB003428 |
| 文献子类 | Review |
| 英文摘要 | We address the spatial changes in organic carbon density and storage in cultivated soils in China from 1980 to 2000 on the basis of measured data from individual studies and those acquired during the second national soil survey in China. The results show a carbon gain in similar to 66% of the cultivated area of China as a whole with the increase in soil organic carbon (SOC) density mostly ranging from 10% to 30%. Soil organic carbon density increased in fluvi-aquic soils (fluvisols, Food and Agriculture Organization ( FAO) of the United Nations) in north China, irrigated silting soils (calcaric fluvisols) in northwest China, latosolic red earths (haplic acrisols/alisols), and paddy soils (fluvisols/cambisols) in south China. In contrast, significant decreases are observed in black soils (phaeozems) in northeast China and latosols (haplic acrisols) in southwest China. No significant changes are detected in loessial soils (calcaric regosols) and dark loessial soils (calcisols) in the loess plateau region. The total SOC storage and average density in the upper 20 cm in the late 1990s are estimated to be similar to 5.37 Pg C and 2.77 kg/m(2), respectively, compared with the values of similar to 5.11 Pg C and 2.63 kg/m(2) in the early 1980s. This reveals an increase of SOC storage of 0.26 Pg C and suggests an overall carbon sink for cultivated soils in China, which has contributed 2-3% to the global terrestrial ecosystem carbon absorption from 1980 to 2000. Statistical analyses suggest an insignificant contribution to the observed SOC increase from climate change, and we infer that it is mostly attributable to improved agricultural practices. Despite the SOC density increases over 20 years, the SOC density of the cultivated soils in China in the late 1990s is still similar to 30% lower compared to their uncultivated counterparts in comparable soil types, suggesting a considerable potential for SOC restoration through improving management practices. Assuming a restoration of similar to 50% of the lost SOC in the next 30-50 years, these soils could potentially absorb similar to 1.03 Pg C from the atmosphere. |
| WOS关键词 | BULK-DENSITY ; FARMING PRACTICES ; CLIMATE-CHANGE ; FOREST SOILS ; NET FLUX ; SEQUESTRATION ; DYNAMICS ; NITROGEN ; MATTER ; ATMOSPHERE |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000267186700002 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) ; National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) ; National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) ; National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; National Science Foundation of China(40730104) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) ; Chinese Academy of Sciences(kzcx2-yw-117) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/71430]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Guo, Zhengtang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100029, Peoples R China 3.Baylor Univ, Dept Geol, Waco, TX 76798 USA 4.Univ Liverpool, Dept Geog, Liverpool L69 7ZT, Merseyside, England |
| 推荐引用方式 GB/T 7714 | Yu, Yanyan,Guo, Zhengtang,Wu, Haibin,et al. Spatial changes in soil organic carbon density and storage of cultivated soils in China from 1980 to 2000[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2009,23. |
| APA | Yu, Yanyan,Guo, Zhengtang,Wu, Haibin,Kahmann, Julia A.,&Oldfield, Frank.(2009).Spatial changes in soil organic carbon density and storage of cultivated soils in China from 1980 to 2000.GLOBAL BIOGEOCHEMICAL CYCLES,23. |
| MLA | Yu, Yanyan,et al."Spatial changes in soil organic carbon density and storage of cultivated soils in China from 1980 to 2000".GLOBAL BIOGEOCHEMICAL CYCLES 23(2009). |
入库方式： OAI收割
来源：地质与地球物理研究所
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