Modeling soil organic carbon dynamics and their driving factors in the main global cereal cropping systems

doi:10.1007/S12225-017-9701-X

	Modeling soil organic carbon dynamics and their driving factors in the main global cereal cropping systems
	Wang, Guocheng ; Zhang, Wen ; Sun, Wenjuan 1; Li, Tingting ; Han, Pengfei 2
	2017
发表期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
卷号	17 期号:19 页码:11849-11859
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.
学科领域	Plant Sciences
DOI	10.1007/S12225-017-9701-X
收录类别	SCI
语种	英语
WOS关键词	LONG-TERM EXPERIMENTS ; ROTHC MODEL ; GREEN-REVOLUTION ; CHINA ; SEQUESTRATION ; CROPLANDS ; NITROGEN ; MANURE ; DECOMPOSITION ; ACCUMULATION
WOS记录号	WOS:000403238600001
出版者	COPERNICUS GESELLSCHAFT MBH
文献子类	Article
出版地	GOTTINGEN
EISSN	1680-7324
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41590870, 31370492]
作者邮箱	wanggc@mail.iap.ac.cn ; zhw@mail.iap.ac.cn
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/21992
专题	植被与环境变化国家重点实验室
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):11849-11859.
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),11849-11859.
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):11849-11859.

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