气候变化领域集成服务门户(CCPortal): Spatiotemporal variation and controlling factors of dried soil layers in a semi-humid catchment and relevant land use management implications

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DOI	10.1016/j.catena.2024.107973
	Spatiotemporal variation and controlling factors of dried soil layers in a semi-humid catchment and relevant land use management implications
	Zhao, Yali; Wang, Yunqiang; Zhou, Jingxiong; Qi, Lijun; Zhang, Pingping
发表日期	2024
ISSN	0341-8162
EISSN	1872-6887
起始页码	240
卷号	240
英文摘要	The formation of dried soil layers (DSLs) is a broad consequence of climate change (i.e., through temperature increases and/or precipitation decreases) and poor land management practices, where these layers exist has severe negative effects (i.e., retardation of vegetation, negative water cycle balance) on the sustainability of restored ecosystems and health of agriculture. Because of the effort and time required, only sporadic in situ measurements on spatial and temporal DSL variation have been reported, particularly at a catchment scale. However, this information is essential for understanding mechanisms associated with evolutionary DSL processes as well as developing effective land management techniques. Accordingly, this study monitored soil water content to a 5 m depth over a 5-year period in a semi-humid catchment on the Loess Plateau while also investigating temporal DSL dynamics and dominant controls. In the semi-humid catchment, DSLs occurred at 90.7 % of all sampling sites. Spatially and temporally averaged DSL formation depth (DSLFD), DSL thickness (DSLT), and DSL soil water content (DSL-SWC) within the 0-5 m profile were 170 cm, 262 cm, and 9.52 %, respectively. Forest and shrubland DSL regimes were drier than those of grassland. These three DSL indices exhibited significant correlation with temperature variables, while only DSLFD variables significantly correlated to precipitation. Land use type was the predominant control of DSL variation at a catchment scale. A spatial DSLT variation comparison under different land use treatment positions determined the feasibility of planting grass at an upslope position and mixed forest/shrubland + grass at mid-slope and downslope positions in the semi-humid catchment, which provides a good case study for afforestation practices at a catchment scale. Findings from this study are intended to aid in catchment soil and water conservation, soil drought mitigation, and sustainable vegetation management practices on the Loess Plateau as well as other water-limited regions worldwide.
英文关键词	Dried soil layer; Spatiotemporal variation; Land use type; Vegetation management; Catchment scale
语种	英语
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:001215710800001
来源期刊	CATENA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290918
作者单位	Chinese Academy of Sciences; Institute of Earth Environment, CAS; Xi'an Jiaotong University; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Zhao, Yali,Wang, Yunqiang,Zhou, Jingxiong,et al. Spatiotemporal variation and controlling factors of dried soil layers in a semi-humid catchment and relevant land use management implications[J],2024,240.
APA	Zhao, Yali,Wang, Yunqiang,Zhou, Jingxiong,Qi, Lijun,&Zhang, Pingping.(2024).Spatiotemporal variation and controlling factors of dried soil layers in a semi-humid catchment and relevant land use management implications.CATENA,240.
MLA	Zhao, Yali,et al."Spatiotemporal variation and controlling factors of dried soil layers in a semi-humid catchment and relevant land use management implications".CATENA 240(2024).