Soil organic carbon sequestration potential of cropland in China
文献类型：期刊论文
| 作者 | Qin, Zhangcai2,3; Huang, Yao ; Zhuang, Qianlai2,3
|
| 刊名 | GLOBAL BIOGEOCHEMICAL CYCLES
 |
| 出版日期 | 2013 |
| 卷号 | 27期号:3页码:711-722 |
| 关键词 | carbon saturation modeling paddy sequestration rate upland |
| ISSN号 | 0886-6236 |
| DOI | 10.1002/gbc.20068 |
| 文献子类 | Article |
| 英文摘要 | Soil organic carbon (SOC) in cropland is of great importance to the global carbon (C) balance and to agricultural productivity, but it is highly sensitive to human activities such as irrigation and crop rotation. It has been observed that under certain improved management practices, cropland soils can sequestrate additional C beyond their existing SOC level before reaching the C saturation state. Here we use data from worldwide, long-term agricultural experiments to develop two statistical models to determine the saturated SOC level (SOCS) in upland and paddy agroecosystems, respectively. We then use the models to estimate SOC sequestration potential (SOCP) in Chinese croplands. SOCP is the difference between SOCS and existing SOC level (SOCE). We find that the models for both the upland and paddy agroecosystems can reproduce the observed SOCS data from long-term experiments. The SOCE and SOCS stock in Chinese upland and paddy croplands (0-30cm soil) are estimated to be 5.2 and 7.9 Pg C with national average densities of 37.4 and 56.8Mg C ha(-1), respectively. As a result, the total SOC sequestration potential is estimated to be 2.7 Pg C or 19.4Mg C ha(-1) in Chinese cropland. Paddy has a relatively higher SOCE (45.4Mg C ha(-1)) than upland (34.7Mg C ha(-1)) and also a greater SOCP at 26.1Mg C ha(-1) compared with 17.2Mg C ha(-1) in the upland. The SOC varies dramatically among different regions. Northeast China has the highest SOCE and SOCS density, while the Loess Plateau has the greatest SOCP density. The time required to reach SOC saturation in Chinese cropland is highly dependent on management practices applied. Chinese cropland has relatively low SOC density in comparison to the global average but could have great potentials for C sequestration under improved agricultural management strategies. |
| 学科主题 | Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
| 出版地 | WASHINGTON |
| 电子版国际标准刊号 | 1944-9224 |
| WOS关键词 | LAND-USE CHANGE ; VERTICAL-DISTRIBUTION ; CLIMATE-CHANGE ; CLAY CONTENT ; MATTER ; STORAGE ; SATURATION ; MODEL ; MANAGEMENT ; FERTILIZER |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| WOS记录号 | WOS:000325488600009 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Basic Research Program of China on Global Change(National Basic Research Program of China) ; National Natural Science Foundation of China(National Natural Science Foundation of China (NSFC)) ; NASA LCLUC project ; Div Of Information & Intelligent Systems ; Direct For Computer & Info Scie & Enginr(National Science Foundation (NSF)NSF - Directorate for Computer & Information Science & Engineering (CISE)) |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/27932]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA 2.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA 3.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Zhangcai,Huang, Yao,Zhuang, Qianlai. Soil organic carbon sequestration potential of cropland in China[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2013,27(3):711-722. |
| APA | Qin, Zhangcai,Huang, Yao,&Zhuang, Qianlai.(2013).Soil organic carbon sequestration potential of cropland in China.GLOBAL BIOGEOCHEMICAL CYCLES,27(3),711-722. |
| MLA | Qin, Zhangcai,et al."Soil organic carbon sequestration potential of cropland in China".GLOBAL BIOGEOCHEMICAL CYCLES 27.3(2013):711-722. |
入库方式： OAI收割
来源：植物研究所
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