Modeling soil organic carbon change in croplands of China
文献类型：期刊论文
| 作者 | Li, CS; Zhuang, YH; Frolking, S; Galloway, J; Harriss, R; Moore, B; Schimel, D; Wang, XK |
| 刊名 | ECOLOGICAL APPLICATIONS
 |
| 出版日期 | 2003 |
| 卷号 | 13期号:2页码:327-336 |
| 关键词 | agroecosystem biogeochemistry carbon sequestration China Chinese agriculture crop residue global warming and carbon sequestration modeling C and N biogeochemical cycles in cropland organic C in cropland soil farming management sustainability |
| 英文摘要 | Using 1990 conditions, we modeled carbon (C) and nitrogen (N) biogeochemical cycles in croplands of China (and, for comparison, the United States) to estimate the annual soil organic-carbon (SOC) balance for all cropland. Overall, we estimate that China's croplands lost 1,.6% of their SOC (to a depth of 0.3 in) in 1990, and that U.S. cropland lost 0.1%. A key element in this difference was that similar to25% of aboveground crop residue in China was returned to the soil, compared to similar to90% in the United States. In China, SOC losses were greatest in the northeast (similar to10(3) kg C.ha(-1).yr(-1)), and were generally smaller (<0.5 X 10(3) kg C.ha(-1).yr(-1)) in regions with a longer cultivation history. Some regions showed SOC gains, generally <10(3) kg C.ha(-1).yr(-1). Reduced organic-matter input to China's cropland soils, and lower overall SOC levels in those soils, led to lower levels of N mineralization in the simulations, consistent with higher rates of synthetic-fertilizer application in China. C and N cycles are closely linked to soil fertility, crop yield, and non-point-source environmental pollution. |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| WOS记录号 | WOS:000182669300005 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/23645]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, CS,Zhuang, YH,Frolking, S,et al. Modeling soil organic carbon change in croplands of China[J]. ECOLOGICAL APPLICATIONS,2003,13(2):327-336. |
| APA | Li, CS.,Zhuang, YH.,Frolking, S.,Galloway, J.,Harriss, R.,...&Wang, XK.(2003).Modeling soil organic carbon change in croplands of China.ECOLOGICAL APPLICATIONS,13(2),327-336. |
| MLA | Li, CS,et al."Modeling soil organic carbon change in croplands of China".ECOLOGICAL APPLICATIONS 13.2(2003):327-336. |
入库方式： OAI收割
来源：生态环境研究中心
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