干旱区生态环境知识资源中心(Arid): Factor contribution to soil organic and inorganic carbon accumulation in the Loess Plateau: Structural equation modeling

Arid

DOI	10.1016/j.geoderma.2019.06.005
	Factor contribution to soil organic and inorganic carbon accumulation in the Loess Plateau: Structural equation modeling
	Zhao, Wei 1,2,3; Zhang, Rui 2,3; Cao, Hua 4; Tan, Wenfeng 2,3,4
通讯作者	Zhao, Wei ; Tan, Wenfeng
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2019
卷号	352 页码:116-125
英文摘要	The effects of climate, soil characteristics and management on soil carbon accumulation have been extensively investigated. However, the relative importance of these factors remains unclear, especially in arid and semiarid regions. Here we evaluated the contribution of the environmental variables (geographical location, climate, soil type, and land use type) to soil organic and inorganic carbon accumulation in the 0-100 cm soil layers across the Loess Plateau in China. A structural equation modeling (SEM) was used to distinguish direct from indirect effects of factors on soil carbon accumulation based on covariance structures. The results showed that environmental temperature and moisture were the primary controls of soil organic carbon density (SOCD) variation. The total effects (the sum of direct and indirect effect) of soil type and land use on SOCD were less than half of those of environmental temperature and moisture. In addition, the direct and negative effect of environmental temperature on SOCD increased, and the direct and positive effect of environmental moisture on SOCD decreased with soil depth. For the soil inorganic carbon densities in the 0-100 cm soil layers, soil organic carbon (SOC) content acted as the most important factor controlling the variations in soil inorganic carbon density (SICD). Environmental temperature and moisture mainly affected indirectly SICD by mediating through its impacts on soil type, SOC content, or soil pH. Less than 40% of variation in soil carbon accumulation for 0-100 cm soil depth is explained in the model. The unexplained variance highlights the need for the data on soil physicochemical properties, quality of organic carbon inputs, and soil microorganisms.
英文关键词	Soil organic carbon Soil inorganic carbon Carbon sequestration Controlling factor Relative contribution Path analysis
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000485207300012
WOS关键词	LAND-USE ; TEMPERATURE SENSITIVITY ; ENVIRONMENTAL-FACTORS ; VERTICAL-DISTRIBUTION ; AGRICULTURAL SOILS ; CLIMATE ; MATTER ; STOCKS ; SEQUESTRATION ; BIOMASS
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215939
作者单位	1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; 2.Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; 3.Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China; 4.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Wei,Zhang, Rui,Cao, Hua,et al. Factor contribution to soil organic and inorganic carbon accumulation in the Loess Plateau: Structural equation modeling[J]. 西北农林科技大学,2019,352:116-125.
APA	Zhao, Wei,Zhang, Rui,Cao, Hua,&Tan, Wenfeng.(2019).Factor contribution to soil organic and inorganic carbon accumulation in the Loess Plateau: Structural equation modeling.GEODERMA,352,116-125.
MLA	Zhao, Wei,et al."Factor contribution to soil organic and inorganic carbon accumulation in the Loess Plateau: Structural equation modeling".GEODERMA 352(2019):116-125.