干旱区生态环境知识资源中心(Arid): Spatial variations in soil erodibility induced by rock outcropping on sloping cropland in the karst region of Southwest China

Arid

DOI	10.1016/j.geoderma.2023.116705
	Spatial variations in soil erodibility induced by rock outcropping on sloping cropland in the karst region of Southwest China
	Chen, Lei; Zhang, Keli; Li, Yetong
通讯作者	Zhang, KL
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2023
卷号	440
英文摘要	Sloping croplands in karst areas of Southwest China usually contain a multitude of rock outcrops with diameters larger than 25 cm. Rock outcrops and spatial location have substantial effects on soil properties and thus likely affect soil erodibility. Moreover, rock outcropping is a indicator of rocky desertification and has an important impact on soil erosion and soil formation processes. However, the potential effects of spatial location and rock outcrops on the soil erodibility of sloping cropland in karst areas are still unclear. This study was performed to explore the variations in soil erodibility reflected by saturated hydraulic conductivity (KS), mean weight diameter (MWD), soil structural stability (SSI), soil erodibility factor (K) and soil organic carbon content (SOC) at three spatial locations in sloping cropland with rock outcrops on the karst hillside. The results showed that the soil erodibility indicators KS, MWD, SSI and SOC declined with increasing soil depth for all tested sites. SSI and SOC were predominant factors contributing to the variation in soil erodibility, which were 34.9 % and 35.1 % at the upper spatial location, 31.4 % and 30.9 % at the middle spatial location, and 32.1 % and 32.6 % at the lower spatial location, respectively. There were significant variations in the K factor between the sloping cropland with rock outcrops and the control group. The variations in soil erodibility indicators with rock outcrops and spatial locations were attributed to the changes in soil particle distribution, soil bulk density and SOC. There was a significant linear correlation between the K factor and spatial location, slope gradient, coverage and height of rock outcrops. These results indicated that rock outcrops and their characteristics can reduce soil erosion intensity by redistributing precipitation and runoff, thus further affecting infiltration and soil erodibility. These findings are helpful to comprehend the processes and mechanisms of the spatial variation in soil erosion on sloping cropland with rock outcrops.
英文关键词	Soil erosion Rock outcrops Spatial variation Soil characteristics Sloping cropland
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001112372500001
WOS关键词	LOESS PLATEAU ; AGGREGATE STABILITY ; LAND-USE ; AGRICULTURAL SOILS ; FRAGMENT CONTENT ; ORGANIC-CARBON ; EROSION ; COVER ; RAINFALL ; WATER
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396703
推荐引用方式 GB/T 7714	Chen, Lei,Zhang, Keli,Li, Yetong. Spatial variations in soil erodibility induced by rock outcropping on sloping cropland in the karst region of Southwest China[J],2023,440.
APA	Chen, Lei,Zhang, Keli,&Li, Yetong.(2023).Spatial variations in soil erodibility induced by rock outcropping on sloping cropland in the karst region of Southwest China.GEODERMA,440.
MLA	Chen, Lei,et al."Spatial variations in soil erodibility induced by rock outcropping on sloping cropland in the karst region of Southwest China".GEODERMA 440(2023).