干旱区生态环境知识资源中心(Arid): Response of preferential flow to soil - root - rock fragment system in karst rocky desertification areas

Arid

DOI	10.1016/j.ecolind.2024.112234
	Response of preferential flow to soil - root - rock fragment system in karst rocky desertification areas
	Hou, Fang; Cheng, Jinhua; Zhang, Han; Wang, Xianglian; Shi, Dewei; Guan, Ning
通讯作者	Cheng, JH
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2024
卷号	165
英文摘要	The response of preferential flow to the soil - rootrock fragment systems is essential for understanding the eco-hydrological processes in karst rocky desertification (KRD) areas. In this study, we investigated the soil properties, root, and rock fragment distribution characteristics and preferential flow in this system. Results show that there are differences in the development of preferential flow under five grades of rocky desertification: light rocky desertification (LRD) > potential rocky desertification (PRD) > non -rocky desertification (NRD) > moderate rocky desertification (MRD) > severe rocky desertification (SRD). Different degrees of rocky desertification have facilitating or inhibiting effects on preferential flow. LRD and PRD promote preferential flow with ratio of 6.6 % -9.6 %, while MRD and SRD inhibit preferential flow with ratio of 4.2 % -6.7 %. The preferential flow is simultaneously influenced by the components of soil - rootrock fragment systems. Root system indicators (i. e., root biomass, root bulk density, and root length density) generally decrease as grades of rocky desertification increase. The surface outcrops density, rock fragment density, and volume fraction tend to increase with grades of rocky desertification. A principal components analysis found that preferential flow of MRD and SRD is highly influenced by rock fragments, while LRD is more driven by root systems and soil properties. PRD is averagely influenced by the combination. These findings suggest that appropriate plant and rock fragment ratios can effectively avoid water loss in the form of preferential flow and more attention should be paid to the ecological problems of LRD and PRD areas.
英文关键词	Preferential flow Karst rocky desertification Rock fragment Root system Soil property
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001263868500001
WOS关键词	SOLUTE TRANSPORT ; BULK-DENSITY ; PENETRATION ; EROSION ; SURFACE ; REGION ; COVER ; LAND
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/2XILL650/403406
推荐引用方式 GB/T 7714	Hou, Fang,Cheng, Jinhua,Zhang, Han,et al. Response of preferential flow to soil - root - rock fragment system in karst rocky desertification areas[J],2024,165.
APA	Hou, Fang,Cheng, Jinhua,Zhang, Han,Wang, Xianglian,Shi, Dewei,&Guan, Ning.(2024).Response of preferential flow to soil - root - rock fragment system in karst rocky desertification areas.ECOLOGICAL INDICATORS,165.
MLA	Hou, Fang,et al."Response of preferential flow to soil - root - rock fragment system in karst rocky desertification areas".ECOLOGICAL INDICATORS 165(2024).