干旱区生态环境知识资源中心(Arid): Control of soil organic carbon under karst landforms: A case study of Guizhou Province, in southwest China

Arid

DOI	10.1016/j.ecolind.2022.109624
	Control of soil organic carbon under karst landforms: A case study of Guizhou Province, in southwest China
	Huang, Kaiwen; Ma, Zhen; Wang, Xingfu; Shan, Junyue; Zhang, Zhenming; Xia, Pinhua; Jiang, Xin; Wu, Xianliang; Huang, Xianfei
通讯作者	Huang, XF
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2022
卷号	145
英文摘要	Global karst landforms account for about 15 % of the land area. The development of karst landforms in southwest China accounts for>1/3 of the country's land area, and is considered to be an important carbon storage with considerable carbon sequestration potential to alleviate global warming. Clarifying the response mechanism of soil organic carbon (SOC) to different controlling factors is of great significance to formulate and implement regional carbon sink strategies. Based on 517 soil samples in Guizhou Province, this study used geostatistical methods to analyze the spatial heterogeneity of SOC in Guizhou Province. The effects of altitude, land use, soil type, slope direction, slope position, slope gradient and rock exposure rate on the spatial variability of SOC in karst areas were quantitatively compared by statistical analysis methods. The results showed that the mean value of SOC content in Guizhou Province was 19.59 g/kg, and the coefficient of variation was 69.11 %, showing moderate-intensity variation. Spatially, the SOC content in Guizhou Province showed a declining trend from west to east, with the low-value areas predominantly distributed in the south and north areas. The semi-variogram model showed that the nugget coefficient C-0/(C-0 + C) was < 25 %, and the SOC in the study area had a strong spatial autocorrelation. The artificial neural network analysis showed that the important coefficients of each independent variable on SOC level were as follows: altitude (0.355) > slope gradient (0.255) > rock exposure rate (0.166) > land use (0.08) > slope position (0.059) > slope direction (0.043) > soil type (0.041). This research suggests that the provincial government should pay attention to the control of rocky desertification and the development of modern low-carbon agriculture in the work of increasing soil carbon sequestration.
英文关键词	Soil organic carbon Spatial variability Karst landform Determinants Soil carbon sequestration
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000882531300003
WOS关键词	LAND-USE ; LOESS PLATEAU ; NITROGEN STOCKS ; VARIABILITY ; FOREST ; DYNAMICS ; PATTERNS ; GRADIENT ; STORAGE ; TOPSOIL
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392361
推荐引用方式 GB/T 7714	Huang, Kaiwen,Ma, Zhen,Wang, Xingfu,et al. Control of soil organic carbon under karst landforms: A case study of Guizhou Province, in southwest China[J],2022,145.
APA	Huang, Kaiwen.,Ma, Zhen.,Wang, Xingfu.,Shan, Junyue.,Zhang, Zhenming.,...&Huang, Xianfei.(2022).Control of soil organic carbon under karst landforms: A case study of Guizhou Province, in southwest China.ECOLOGICAL INDICATORS,145.
MLA	Huang, Kaiwen,et al."Control of soil organic carbon under karst landforms: A case study of Guizhou Province, in southwest China".ECOLOGICAL INDICATORS 145(2022).