Controlling gully- and revegetation-induced dried soil layers across a slope-gully system

doi:10.1016/j.scitotenv.2020.142444

	Controlling gully- and revegetation-induced dried soil layers across a slope-gully system
	Zhang, Chencheng 2,3; Wang, Yunqiang 1,2,3,5; Shao, Ming'an 4
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021-02-10
卷号	755 页码:12
关键词	Environmental factors Side evaporation Soil-water deficit Partial least squares regression Loess Plateau
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2020.142444
通讯作者	Wang, Yunqiang(wangyq@ieecas.cn)
英文摘要	The introduction of exotic plants and improper management strategies with regard to plant species can change the soil-water balance of deep soils, which in turn results in the formation of a dried soil layer (DSL) within the soil profile. The Loess Plateau (LP) of China has a complex terrain; however, only a few studies have evaluated the effects of the gully-induced DSL patterns, especially in hilly and gully regions of the northern LP. In this study, we collected soil-water content data to a depth of 5 m at 40 sampling sites in a slope-gully system to investigate and characterize DSLs and their spatial patterns. Results show that the DSL indices vary greatly in different slope positions. The thickness of DSLs (DSLT) and quantitative index (QI) in the gully were significantly (p < 0.05) higher than those in the non-gully areas. The relative contribution of soil properties was higher than those of terrain factors in the gully, whereas the contribution of terrain factors was higher than those of soil properties under shrubland. Gullies contributed to the complex spatial DSL patterns in the slope-gully system. Partial least squares regression (PLSR) was used to detect the relative significance of 10 selected environmental factors that affect spatial DSL patterns. Variable importance in projection (VIP) demonstrated that soil properties, especially Clay and Silt content, significantly influenced the DSL formation depth (DSLFD), DSLT, and QI. Land-use and slope position were the most important factors that influenced the mean soil-water content (SWC) within DSLs (DSL-SWC), which exhibited the highest VIP values. PLSR models simulated DSL indices accurately in DSL-SWC; the values for variation in response (R-2) and goodness of prediction (Q(2)) were 0.94 and 0.92, respectively. Therefore, our findings provide a helpful base reference for DSL management and reclamation of hill and gully regions of the LP. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41722106] ; National Natural Science Foundation of China[41807020] ; National Natural Science Foundation of China[41971045] ; Ten Thousand Talent Program for Young top-notch talent ; Open Foundation of State Key Laboratory of Loess and Quaternary Geology[QDJF1803]
WOS关键词	LEAST-SQUARES REGRESSION ; LOESS PLATEAU ; SPATIAL VARIABILITY ; CRISSCROSS REGION ; MOISTURE DEFICIT ; WATER CONTENT ; CHINA ; SCALE ; VEGETATION ; IMPACT
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000600786700004
资助机构	National Natural Science Foundation of China ; Ten Thousand Talent Program for Young top-notch talent ; Open Foundation of State Key Laboratory of Loess and Quaternary Geology
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/136715]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Yunqiang
作者单位	1.Beijing Normal Univ, Interdisciplinary Res Ctr Earth Sci Frontier, Beijing 100875, Peoples R China 2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 5.Xi An Jiao Tong Univ, Dept Earth & Environm Sci, Xian 710049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Chencheng,Wang, Yunqiang,Shao, Ming'an. Controlling gully- and revegetation-induced dried soil layers across a slope-gully system[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,755:12.
APA	Zhang, Chencheng,Wang, Yunqiang,&Shao, Ming'an.(2021).Controlling gully- and revegetation-induced dried soil layers across a slope-gully system.SCIENCE OF THE TOTAL ENVIRONMENT,755,12.
MLA	Zhang, Chencheng,et al."Controlling gully- and revegetation-induced dried soil layers across a slope-gully system".SCIENCE OF THE TOTAL ENVIRONMENT 755(2021):12.