干旱区生态环境知识资源中心(Arid): Natural compensation mechanism of soil water infiltration through decayed roots in semi-arid vegetation species

Arid

DOI	10.1016/j.scitotenv.2021.151985
	Natural compensation mechanism of soil water infiltration through decayed roots in semi-arid vegetation species
	Cui, Zeng; Huang, Ze; Liu, Yu; Lopez-Vicente, Manuel; Wu, Gao-Lin
通讯作者	Wu, GL
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	819
英文摘要	In arid and semi-arid areas, unsuitable afforestation programs may cause soil water deficit and even, in some cases, deep-soil desiccation and the subsequent death of part of the vegetation. However, the benefits of preferential flow through decayed root channels for supplying water in the dried soil layers are rarely evaluated. This study examines the effects of root channels on soil water content (SWC) and infiltration (initial and steady-state) in two planted species with high drought tolerance, namely: Korshinsk peashrub (Caragana korshinskii Kom.), and red plum apricot (Armeniaca vulgaris Lam.), using bare land as control site and published data from alfalfa (Medicago sativa L.) plots to refine results analysis. The infiltration rates were measured using a double-ring infiltrometer in areas with alive and decayed roots; and methylene blue was used to trace the pathways of water flow. The highest SWC appeared in the Korshinsk peashrub land, whereas the alfalfa grassland had the lowest SWC; and the differences of SWC among treatments were significant at all soil layers. Korshinsk peashrub had the highest steady infiltration rates, which were about 23% and 83% higher than those rates measured in the fruit tree plantation and alfalfa grasslands, respectively. The steady infiltration rates were significantly and positively correlated with the average root diameter and area. Within the same species, the decayed root plots significantly increased the soil water infiltration capacity compared to the alive root plots. Considering the water scarcity conditions of the study area, the preferential flow formed through decomposed roots was conducive to soil water supplement, appearing as a natural compensation mechanism caused by dead vegetation. Our findings contribute to a better understanding of soil water infiltration during root decay of the plants in water-limited ecosystems, and how this dynamic replenishes soil moisture and alleviates soil desiccation.(c) 2021 Elsevier B.V. All rights reserved.
英文关键词	Infiltration Plant decayed root Preferential water flow Soil macropores Soil water replenishment Semi-arid vegetation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000789620500002
WOS关键词	PREFERENTIAL FLOW ; LOESS PLATEAU ; MACROPORES ; DESICCATION ; INCREASE ; SYSTEMS ; L.
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/2XILL650/394351
推荐引用方式 GB/T 7714	Cui, Zeng,Huang, Ze,Liu, Yu,et al. Natural compensation mechanism of soil water infiltration through decayed roots in semi-arid vegetation species[J],2022,819.
APA	Cui, Zeng,Huang, Ze,Liu, Yu,Lopez-Vicente, Manuel,&Wu, Gao-Lin.(2022).Natural compensation mechanism of soil water infiltration through decayed roots in semi-arid vegetation species.SCIENCE OF THE TOTAL ENVIRONMENT,819.
MLA	Cui, Zeng,et al."Natural compensation mechanism of soil water infiltration through decayed roots in semi-arid vegetation species".SCIENCE OF THE TOTAL ENVIRONMENT 819(2022).