干旱区生态环境知识资源中心(Arid): Water use of Salix in the variably unsaturated zone of a semiarid desert region based on in-situ observation

Arid

DOI	10.1016/j.jhydrol.2020.125579
	Water use of Salix in the variably unsaturated zone of a semiarid desert region based on in-situ observation
	Zhao, Ming; Wang, Wenke; Wang, Zhoufeng; Chen, Li; Ma, Zhitong; Wang, Qiangmin
通讯作者	Wang, WK (corresponding author), Changan Univ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, Minist Educ, Xian, Shaanxi, Peoples R China.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	591
英文摘要	Soil water and groundwater are important water resources for vegetation survival and growth in arid and semiarid regions, and their contributions to water use over a whole growth period are difficult to quantify with limited observations. Additionally, the root water uptake (RWU) processes of groundwater-dependent xeric vegetation are specific and aggravate the complexity of these issues. In this paper, Salix is selected to study the interaction among atmosphere, soil water, groundwater, and RWU from the sprout to withered stage based on an observation within the 'In situ Monitoring Lysimeter System of the Atmosphere-Plant-Unsaturated Zone-Groundwater Continuum'. Two lysimeters with a diameter of 2 m and depths of 1.2 m and 4.2 m were implemented with Salix. The initial water table depth was 0.7 m in case 1 and 2.2 m in case 2. The results show that: Water use of Salix is the main contribution to actual evapotranspiration (ETa), no less than 80%. ETa was 462.75 mm in case 1 with a shallower soil layer and limited groundwater, during the entire growth period, 2016. Contrastively, it was 619.70 mm in case 2 with relatively abundant soil water and groundwater. The soil water and groundwater contribution were 89.6% and 10.4%, 74.3% and 25.7% for both cases. The selective water use by Salix in different soil layers was subject to temporal moisture availability. Salix extended to utilize groundwater in drought period and shifted back to wetter upper layers in case of rainfall. The access to groundwater significantly alleviates water stress, although rainfall replenishment can also play a part. Salix can not only intercept rainfall infiltration in the root zone, but also cause the decrease of water level, implying that the replanting of Salix should be carried out in a reasonable mode to ensure rainfall infiltration and reduce the ineffective loss of groundwater. Our results provide a practical reference for groundwater management and ecology restoration in semiarid desert regions.
英文关键词	Water use Salix Root water uptake Water table depth In-situ observation Semiarid regions
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000599757800085
WOS关键词	LOESS PLATEAU ; GROUNDWATER FLUCTUATIONS ; ROOT MORPHOLOGY ; HYDRAULIC LIFT ; SOIL LAYERS ; VEGETATION ; PRECIPITATION ; ECOSYSTEM ; DYNAMICS ; PATTERNS
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349014
作者单位	[Zhao, Ming; Wang, Wenke; Wang, Zhoufeng; Chen, Li; Ma, Zhitong; Wang, Qiangmin] Changan Univ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, Minist Educ, Xian, Shaanxi, Peoples R China; [Zhao, Ming; Wang, Wenke; Wang, Zhoufeng; Chen, Li; Ma, Zhitong; Wang, Qiangmin] Changan Univ, Sch Water & Environm, Xian, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Ming,Wang, Wenke,Wang, Zhoufeng,et al. Water use of Salix in the variably unsaturated zone of a semiarid desert region based on in-situ observation[J],2020,591.
APA	Zhao, Ming,Wang, Wenke,Wang, Zhoufeng,Chen, Li,Ma, Zhitong,&Wang, Qiangmin.(2020).Water use of Salix in the variably unsaturated zone of a semiarid desert region based on in-situ observation.JOURNAL OF HYDROLOGY,591.
MLA	Zhao, Ming,et al."Water use of Salix in the variably unsaturated zone of a semiarid desert region based on in-situ observation".JOURNAL OF HYDROLOGY 591(2020).