Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-11849-2017 |
Modeling soil organic carbon dynamics and their driving factors in the main global cereal cropping systems | |
Wang, Guocheng1; Zhang, Wen1; Sun, Wenjuan2; Li, Tingting1; Han, Pengfei3 | |
2017-10-06 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:19 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Changes in the soil organic carbon (SOC) stock are determined by the balance between the carbon input from organic materials and the output from the decomposition of soil C. The fate of SOC in cropland soils plays a significant role in both sustainable agricultural production and climate change mitigation. The spatiotemporal changes of soil organic carbon in croplands in response to different carbon (C) input management and environmental conditions across the main global cereal systems were studied using a modeling approach. We also identified the key variables that drive SOC changes at a high spatial resolution (0.1 degrees x 0.1 degrees) and over a long timescale (54 years from 1961 to 2014). A widely used soil C turnover model (RothC) and state-of-the-art databases of soil and climate variables were used in the present study. The model simulations suggested that, on a global average, the cropland SOC density increased at annual rates of 0.22, 0.45 and 0.69 Mg C ha(-1) yr(-1) under crop residue retention rates of 30, 60 and 90 %, respectively. Increasing the quantity of C input could enhance soil C sequestration or reduce the rate of soil C loss, depending largely on the local soil and climate conditions. Spatially, under a specific crop residue retention rate, relatively higher soil C sinks were found across the central parts of the USA, western Europe, and the northern regions of China. Relatively smaller soil C sinks occurred in the high-latitude regions of both the Northern and Southern hemispheres, and SOC decreased across the equatorial zones of Asia, Africa and America. We found that SOC change was significantly influenced by the crop residue retention rate (linearly positive) and the edaphic variable of initial SOC content (linearly negative). Temperature had weak negative effects, and precipitation had significantly negative impacts on SOC changes. The results can help guide carbon input management practices to effectively mitigate climate change through soil C sequestration in croplands on a global scale. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000412470000002 |
WOS关键词 | LONG-TERM EXPERIMENTS ; ROTHC MODEL ; GREEN-REVOLUTION ; CHINA ; SEQUESTRATION ; CROPLANDS ; NITROGEN ; MANURE ; DECOMPOSITION ; ACCUMULATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/18394 |
专题 | 地球科学 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Ato, Beijing 100029, Peoples R China; 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China; 3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Guocheng,Zhang, Wen,Sun, Wenjuan,et al. Modeling soil organic carbon dynamics and their driving factors in the main global cereal cropping systems[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(19). |
APA | Wang, Guocheng,Zhang, Wen,Sun, Wenjuan,Li, Tingting,&Han, Pengfei.(2017).Modeling soil organic carbon dynamics and their driving factors in the main global cereal cropping systems.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(19). |
MLA | Wang, Guocheng,et al."Modeling soil organic carbon dynamics and their driving factors in the main global cereal cropping systems".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.19(2017). |
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