Spatial changes and driving variables of topsoil organic carbon stocks in Chinese croplands under different fertilization strategies
文献类型：期刊论文
| 作者 | Ren, Fengling1,2; Misselbrook, T. H.2; Sun, Nan1; Zhang, Xubo3; Zhang, Shuxiang1; Jiao, Jianghua1; Xu, Minggang1; Wu, L.2 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2021-05-01 |
| 卷号 | 767页码:11 |
| ISSN号 | 0048-9697 |
| 关键词 | Soil organic carbon Topsoil Chinese croplands Long-term fertilization Region |
| DOI | 10.1016/j.scitotenv.2020.144350 |
| 通讯作者 | Sun, Nan(sunan@caas.cn) ; Xu, Minggang(xuminggang@caas.cn) |
| 英文摘要 | The effect of different fertilization strategies on changes in soil organic carbon (SOC) largely depends on the current status of a given agricultural region. We analysed the results of 90 long-term field trials (20-37 years) in Chinese croplands to determine the effects of fertilization strategies [i.e., no fertilizer (a), chemical fertilizer (NPK), manure only (M) and manure plus chemical fertilizers (NPKM)] on soil organic carbon stock (SOCs) at 0-20 an depth in the North (NC), Northeast (NEC), Northwest (NWC) and South (SC) China. Compared with initial values, SOCs increased by 24-68% and 24-74% under NPKM and M applications, respectively, over the experimental periods. furthermore, final SOCs under NPKM in NEC and NWC were significantly higher than those under other treatments, but there was no significant difference between NPKM and M in SC and no significant differences among fertilizer treatments in NC. Average SOC stock change rates (SOCr) were positive under all treatments for all regions except for CK and NPK in NEC. which were negative. There were regional differences in treatment effects: all treatments showed significantly different rates in NC and NWC, whereas there were no significant differences between the M and NPKM in NEC and SC. Random forest (RF) modeling showed that among the selected variables initial SOCs was the most important in accounting for differences in SOCr, followed by soil bulk density, mean annual temperature and predpitation for all treatments. Soil total nitrogen content was also an important explanatory variable for SOCr for CK and NPK, and soil pH for M. This study has highlighted the main driving variables of SOC change which can be of use in optimizing fertilization strategies, by taking account of the baseline SOCs status and environmental factors for different regions, to minimize soil carbon emissions while maximizing carbon sequestration in soils. (C) 2020 Elsevier B.V. All rights reserved. |
| 资助项目 | National Natural Science Foundation of China[41620104006] ; National Key Research and Development Program of China[2017YFC0503805] ; Fundamental Research Funds for the Non-profit National Research Institute[Y2017LM06] ; BBSRC Institute Strategic Programme (ISP) grant, Soils to Nutrition (S2N)[BBS/E/C/000I0330] ; BBSRC Institute Strategic Programme (ISP) grant, Soils to Nutrition (S2N)[BBS/E/C/000I0320] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000617681100027 |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China ; Fundamental Research Funds for the Non-profit National Research Institute ; BBSRC Institute Strategic Programme (ISP) grant, Soils to Nutrition (S2N) |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/160419]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Sun, Nan; Xu, Minggang |
| 作者单位 | 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Qual Arable Land, Beijing 100081, Peoples R China 2.Rothamsted Res, Sustainable Agr Syst, Okehampton EX20 2SB, Devon, England 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ren, Fengling,Misselbrook, T. H.,Sun, Nan,et al. Spatial changes and driving variables of topsoil organic carbon stocks in Chinese croplands under different fertilization strategies[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,767:11. |
| APA | Ren, Fengling.,Misselbrook, T. H..,Sun, Nan.,Zhang, Xubo.,Zhang, Shuxiang.,...&Wu, L..(2021).Spatial changes and driving variables of topsoil organic carbon stocks in Chinese croplands under different fertilization strategies.SCIENCE OF THE TOTAL ENVIRONMENT,767,11. |
| MLA | Ren, Fengling,et al."Spatial changes and driving variables of topsoil organic carbon stocks in Chinese croplands under different fertilization strategies".SCIENCE OF THE TOTAL ENVIRONMENT 767(2021):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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