干旱区生态环境知识资源中心(Arid): Effect of vegetation patchiness on the subsurface water distribution in abandoned farmland of the Loess Plateau, China

Arid

DOI	10.1016/j.scitotenv.2020.141416
	Effect of vegetation patchiness on the subsurface water distribution in abandoned farmland of the Loess Plateau, China
	Wang, Rui; Dong, Zhibao; Zhou, Zhengchao; Wang, Ning; Xue, Zhijing; Cao, Liguo
通讯作者	Dong, ZB
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	746
英文摘要	Patchiness of grassland results in important effects on ecohydrological processes in arid and semiarid areas; however, the influences on subsurface water flow and soil water distribution remain poorly understood, particularly during vegetation succession on slopes. This study examined these effects by comparing the water flow behaviors and preferential infiltration between vegetation patches (VP) and interspace patches (IP) in three sites at different states of vegetation succession (grass, subshrub and shrub) in abandoned farmland of the Loess Plateau, China. Dye tracer infiltration showed that patchiness of vegetation increased spatial variations of soil water and preferential infiltration by increasing the densities of fine root length and fine root volume in the soil profile. Moreover, the more abundant and intricate roots following a lateral direction beneath VP likely contributed to lateral flow and infiltration variability. However, differences between VP and IP were not significant because considerable living fine roots and decayed roots of IP also provided preferential flow pathways. Our finding indicated that IP could compete with VP for access to soil water resources, which potentially increased hillslope-scale infiltration and reduced surface runoff and erosion risk. Under the different states of vegetation succession, subshrub patches showed significantly greater preferential infiltration volume(28.53mm) and contribution of preferential infiltration to total infiltration (60.58%) than grass and shrub patches. Vegetation patch size made positive effects on improving preferential flow and water movement. Greater preferential flow in subshrub patches played a positive role in soil water storage and replenishment. Therefore, natural restoration of a slope area with small heterogeneity in preferential flow can be successfully applied in the Loess Plateau, particularly during the subshrub succession state. (C) 2020 Published by Elsevier B.V.
英文关键词	Preferential flow Infiltration Restoration of natural vegetation Vegetation patch Abandoned farmland Loess Plateau
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000579371300096
WOS关键词	PREFERENTIAL FLOW ; SHRUB ENCROACHMENT ; DYE TRACER ; LAND PREPARATION ; SOIL MACROPORES ; INTER-PATCHES ; INFILTRATION ; PATTERNS ; RUNOFF ; SYSTEMS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326845
作者单位	[Wang, Rui; Dong, Zhibao; Zhou, Zhengchao; Wang, Ning; Xue, Zhijing; Cao, Liguo] Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wang, Rui,Dong, Zhibao,Zhou, Zhengchao,et al. Effect of vegetation patchiness on the subsurface water distribution in abandoned farmland of the Loess Plateau, China[J],2020,746.
APA	Wang, Rui,Dong, Zhibao,Zhou, Zhengchao,Wang, Ning,Xue, Zhijing,&Cao, Liguo.(2020).Effect of vegetation patchiness on the subsurface water distribution in abandoned farmland of the Loess Plateau, China.SCIENCE OF THE TOTAL ENVIRONMENT,746.
MLA	Wang, Rui,et al."Effect of vegetation patchiness on the subsurface water distribution in abandoned farmland of the Loess Plateau, China".SCIENCE OF THE TOTAL ENVIRONMENT 746(2020).