干旱区生态环境知识资源中心(Arid): Distribution and influencing factors of soil organic carbon in a typical karst catchment undergoing natural restoration

Arid

DOI	10.1016/j.catena.2022.106078
	Distribution and influencing factors of soil organic carbon in a typical karst catchment undergoing natural restoration
	Li, Yuan; Xiong, Kangning; Liu, Ziqi; Li, Kaiping; Luo, Ding
通讯作者	Xiong, KN ; Liu, ZQ
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	212
英文摘要	Understanding the distribution patterns and controlling factors of soil organic carbon (SOC) in karst areas is important for soil carbon management. However, due to the wide variety of human activities and karst habitats, the factors influencing SOC in karst areas vary. A typical catchment undergoing natural restoration in the karst region of South China was investigated to determine the distribution and variation of soil properties and SOC stocks (SOCSs) under three types of terrain: a hillslope, a depression and a sinkhole. The factors influencing SOC under the different terrain types were determined by redundancy analysis and multiple linear regression modelling. The results indicated that terrain and hydrological conditions affect the distribution of SOC on the hillslope. The spatial heterogeneity of SOC and dissolved organic carbon (DOC) on the hillslope was high. Terrain type and land use differences significantly affected the SOC and DOC concentrations at the catchment scale. SOC loss was more serious in the depression due to agricultural activities, and SOC accumulation was more obvious on the hillslope due to its relatively long natural restoration period. The average SOCSs of the hillslope were 16.5% and 54.6% larger than those of the depression and sinkhole, respectively, and the average dissolved organic carbon stocks (DOCSs) were 70.6% and 179.7% larger, respectively. In addition, the impacts of environmental factors on SOC and DOC varied among the different terrain types. Soil texture and topography were the main factors controlling the distribution of SOC and DOC on the hillslope and in the whole catchment, and soil texture was the main factor controlling SOC at the catchment scale. In addition, soil loss through sinkholes may be an important carbon sink in karst areas. The results of this study are of great significance for evaluating soil carbon storage and vegetation restoration strategies in karst areas.
英文关键词	Catchment Terrain type Rocky desertification Agricultural activity Influencing factor
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000821283400005
WOS关键词	PARTICLE-SIZE DISTRIBUTIONS ; LAND-USE ; VEGETATION RESTORATION ; AGRICULTURAL ABANDONMENT ; SPATIAL VARIABILITY ; LOESS PLATEAU ; NITROGEN ; CHINA ; ECOSYSTEMS ; FRACTIONS
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392087
推荐引用方式 GB/T 7714	Li, Yuan,Xiong, Kangning,Liu, Ziqi,et al. Distribution and influencing factors of soil organic carbon in a typical karst catchment undergoing natural restoration[J],2022,212.
APA	Li, Yuan,Xiong, Kangning,Liu, Ziqi,Li, Kaiping,&Luo, Ding.(2022).Distribution and influencing factors of soil organic carbon in a typical karst catchment undergoing natural restoration.CATENA,212.
MLA	Li, Yuan,et al."Distribution and influencing factors of soil organic carbon in a typical karst catchment undergoing natural restoration".CATENA 212(2022).