干旱区生态环境知识资源中心(Arid): Impact of landscape positions on soil erodibility indices in typical vegetation-restored slope-gully systems on the Loess Plateau of China

Arid

DOI	10.1016/j.catena.2021.105235
	Impact of landscape positions on soil erodibility indices in typical vegetation-restored slope-gully systems on the Loess Plateau of China
	Wang, Hao; Wang, Jian; Zhang, Guang-hui
通讯作者	Wang, J (corresponding author), Northwest A&F Univ, Coll Resources & Environm, 3 Taicheng Rd, Yangling 712100, Shaanxi, Peoples R China. ; Zhang, GH (corresponding author), Beijing Normal Univ, State Key Lab Earth Surface Proc & Resources Ecol, Beijing 100875, Peoples R China.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2021
卷号	201
英文摘要	Landscape position of the slope-gully system has considerable effects on the near soil surface characteristics, which in turn affect soil erodibility. However, little attention has been paid to the spatial variation of soil emdibility in vegetation-restored slope-gully systems in arid and semiarid regions. This study aimed to detect spatial variations in the soil emdibility indices of soil cohesion (Coh), saturated conductivity (K-s), aggregate stability (the number of drop impact (NDI) and the mean weight diameter (MWD)), penetration resistance (PR), emdibility K factor, and a comprehensive soil erodibility index (CSEI) under a north-facing slope-gully system (NSG) and a south-facing slope-gully system (SSG) on the Loess Plateau. The results showed that Coh, K-s, NDI, and MWD increased generally from the high to low landscape positions for both the NSG and SSG, whereas PR and K had the opposite trend. Coh, K-s, NDI, and MWD of the NSG were significantly greater than those of the SSG, but PR and K of the NSG were notably lower than those of the SSG. For both the NSG and SSG, the CSEI increased first then declined sharply until reaching the gully floor. For the NSG, the ratios of the CSEI of the summit, upper ridge slope, middle ridge slope, lower ridge slope and gully slope to the CSEI of gully floor were 23.5, 33.7, 28.1, 25.2, and 13.6. For the SSG, these ratios were 2.8, 4.1, 3.8, 3.7, and 2.4. The CSEI of the NSG was significantly less than that of the SSG at all positions, which indicates that the soil erosion resistance of the NSG was significantly greater than that of the SSG. The variations in soil erodibility was attributed to the differences in biological crust thickness, plant litter and root densities, soil bulk density, texture and organic matter content with landscape position and aspect.
英文关键词	Soil erosion Spatial variability Near-surface characteristics Vegetation restoration K factor
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000631043700040
WOS关键词	AGGREGATE STABILITY ; ORGANIC-MATTER ; WATER EROSION ; HYDRAULIC CONDUCTIVITY ; TEMPORAL VARIATIONS ; OVERLAND-FLOW ; LAND USES ; PLANT ; CRUSTS ; LITTER
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
来源机构	北京师范大学 ; 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/2XILL650/368757
作者单位	[Wang, Hao; Wang, Jian] Northwest A&F Univ, Coll Resources & Environm, 3 Taicheng Rd, Yangling 712100, Shaanxi, Peoples R China; [Zhang, Guang-hui] Beijing Normal Univ, State Key Lab Earth Surface Proc & Resources Ecol, Beijing 100875, Peoples R China; [Zhang, Guang-hui] Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hao,Wang, Jian,Zhang, Guang-hui. Impact of landscape positions on soil erodibility indices in typical vegetation-restored slope-gully systems on the Loess Plateau of China[J]. 北京师范大学, 西北农林科技大学,2021,201.
APA	Wang, Hao,Wang, Jian,&Zhang, Guang-hui.(2021).Impact of landscape positions on soil erodibility indices in typical vegetation-restored slope-gully systems on the Loess Plateau of China.CATENA,201.
MLA	Wang, Hao,et al."Impact of landscape positions on soil erodibility indices in typical vegetation-restored slope-gully systems on the Loess Plateau of China".CATENA 201(2021).