干旱区生态环境知识资源中心(Arid): Water Uptake from Different Soil Depths for Desert Plants in Saline Lands of Dunhuang, NW China

Arid

DOI	10.3389/fenvs.2020.585464
	Water Uptake from Different Soil Depths for Desert Plants in Saline Lands of Dunhuang, NW China
	Cui, Yong-Qin; Niu, Li-Qin; Xiang, Jin-Li; Sun, Jia-Huan; Xiao, Jian-Hua; Ma, Jian-Ying
通讯作者	Ma, JY (corresponding author), Northeast Normal Univ, Sch Geog Sci, Changchun, Peoples R China.
来源期刊	FRONTIERS IN ENVIRONMENTAL SCIENCE
EISSN	2296-665X
出版年	2021
卷号	8
英文摘要	Salinization is a major threat to the sustainability of land and water resources, especially in arid and semiarid regions. Understanding the water uptake from different soil depths for desert plants is useful for exploring salinity-tolerance mechanism in desert plants in extremely-arid and salinity-affected area. To understand water uptake from different soil depths for desert plants in Dunhuang, NW China, we used oxygen isotope composition in plant xylem water and soil water to determine the water sources in three different saline sites differing in their degree of soil electrical conductance (site 2 < site 1 < site 3). The co-existing desert plants in each saline site extracted different depth of soil water respectively: K. foliatum mainly used shallow soil water (0-20 cm); H. caspica and N. tangutorum mainly used deep soil water (40-200 cm); A. sparsifolia used water from the 120-200 cm soil layers, while T. ramosissima and E. angustifolia mainly extracted deeper soil water (>200 cm). Compared to that in saline site 2, Tamarix ramosissima and Alhagi sparsifolia can switch their water sources to deeper soil water when enduring more salt stress. Also, a significant and positive correlation between soil EC and soil water delta O-18 values was observed, indicating the evaporation would cause increase in salt concentration and isotopic enrichment in the upper soil profile. Overall, our results suggest that plants may explore deeper soil water to adapt to salt stress under severe salinity. This work may contribute to selecting salt-tolerant plants species which is vital to saline soil rehabilitation and utilization.
英文关键词	stable oxygen isotope desert plants saline land soil water utilization Dunhuang
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000617144100001
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/2XILL650/347900
作者单位	[Cui, Yong-Qin; Niu, Li-Qin; Xiang, Jin-Li] Univ Finance & Econ, Coll Resources & Environm, Taiyuan, Peoples R China; [Sun, Jia-Huan; Xiao, Jian-Hua] Chinese Acad Sci, Key Lab Desert & Desertificat, Lanzhou, Peoples R China; [Ma, Jian-Ying] Northeast Normal Univ, Sch Geog Sci, Changchun, Peoples R China
推荐引用方式 GB/T 7714	Cui, Yong-Qin,Niu, Li-Qin,Xiang, Jin-Li,et al. Water Uptake from Different Soil Depths for Desert Plants in Saline Lands of Dunhuang, NW China[J],2021,8.
APA	Cui, Yong-Qin,Niu, Li-Qin,Xiang, Jin-Li,Sun, Jia-Huan,Xiao, Jian-Hua,&Ma, Jian-Ying.(2021).Water Uptake from Different Soil Depths for Desert Plants in Saline Lands of Dunhuang, NW China.FRONTIERS IN ENVIRONMENTAL SCIENCE,8.
MLA	Cui, Yong-Qin,et al."Water Uptake from Different Soil Depths for Desert Plants in Saline Lands of Dunhuang, NW China".FRONTIERS IN ENVIRONMENTAL SCIENCE 8(2021).