干旱区生态环境知识资源中心(Arid): Artificial forest conversion into grassland alleviates deep-soil desiccation in typical grass zone on China's Loess Plateau: Regional modeling

Arid

DOI	10.1016/j.agee.2021.107608
	Artificial forest conversion into grassland alleviates deep-soil desiccation in typical grass zone on China's Loess Plateau: Regional modeling
	Bai, Xiao; Jia, Xiaoxu; Zhao, Chunlei; Shao, Ming'an
通讯作者	Jia, XX (corresponding author), Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11 Datun Rd, Beijing 100101, Peoples R China.
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2021
卷号	320
英文摘要	Afforestation has significantly increased vegetation cover and has slowed soil erosion on China's Loess Plateau (CLP). However, intensive afforestation activities in semi-arid regions that are in excess of local water availability can cause imbalances in the soil water budget. This can cause soil desiccation, which in turn builds up dry soil layers (DSL) in the soil profile. The occurrence of DSL can threaten the sustainable development of restored ecosystems in water-scarce regions. Knowledge of the spatial characteristics of DSL in artificial forests and their response to land-use change is critical for optimal soil water management and ecological sustainability in the CLP. Therefore, the spatial characteristics of DSL under artificial forest in a typical grassland area on the CLP were investigated. The temporal (2015-2040) dynamics of soil water content (SWC) in the 0-5 m soil profile after the land-use change were simulated and analysed using the Hydrus-1D software. Based on the investigation, DSL existed at some 81% of the sampling sites in the typical grassland area on the CLP. The occurrence of DSL was graded as severe, with a mean thickness of 297 cm and mean SWC of only 9%. The model simulation showed that two phases of SWC dynamics developed after land-use change. One of the phases is the gradual recovery of SWC after the conversion of artificial forests into grassland. The other is that of SWC fluctuations with rainfall under grassland conditions. It requires some 2-13 years (mean of similar to 7 years) for the soil water to recover in the 0-5 m soil profile after artificial forest is converted to grassland across the semi-arid grass zone of the CLP. Structural equation modelling showed that the duration of DSL recovery was driven directly or indirectly by the degree of dryness of the DSL, soil hydraulic properties, and slope. It is therefore concluded that DSL in the 5-m soil profile can fully recover if there is a vegetation shift in the semi-arid grassland area of the CLP. This is critical for prediction studies of DSL dynamics and sustainable soil water management in water-scarce plateau regions.
英文关键词	Soil hydrology Dry soil layer Land-use change Hydrus-1D China's Loess Plateau
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000691679400007
WOS关键词	WATER CARRYING-CAPACITY ; SOUTH-NORTH TRANSECT ; DIE-OFF ; VEGETATION ; LAYERS ; FLOW ; REVEGETATION ; OPTIMIZATION ; VARIABILITY ; PATTERNS
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
来源机构	中国科学院地理科学与资源研究所 ; 西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362390
作者单位	[Bai, Xiao; Shao, Ming'an] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China; [Jia, Xiaoxu; Zhao, Chunlei; Shao, Ming'an] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11 Datun Rd, Beijing 100101, Peoples R China; [Jia, Xiaoxu; Zhao, Chunlei; Shao, Ming'an] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Bai, Xiao,Jia, Xiaoxu,Zhao, Chunlei,et al. Artificial forest conversion into grassland alleviates deep-soil desiccation in typical grass zone on China's Loess Plateau: Regional modeling[J]. 中国科学院地理科学与资源研究所, 西北农林科技大学,2021,320.
APA	Bai, Xiao,Jia, Xiaoxu,Zhao, Chunlei,&Shao, Ming'an.(2021).Artificial forest conversion into grassland alleviates deep-soil desiccation in typical grass zone on China's Loess Plateau: Regional modeling.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,320.
MLA	Bai, Xiao,et al."Artificial forest conversion into grassland alleviates deep-soil desiccation in typical grass zone on China's Loess Plateau: Regional modeling".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 320(2021).