干旱区生态环境知识资源中心(Arid): Variation in depth of water uptake for Pinus sylvestris var. mongolica along a precipitation gradient in sandy regions

Arid

DOI	10.1016/j.jhydrol.2019.123921
	Variation in depth of water uptake for Pinus sylvestris var. mongolica along a precipitation gradient in sandy regions
	Zhou, Hai 1; Zhao, Wenzhi1 ; He, Zhibin 1; Yan, Jialiang 2; Zhang, Gefei 1
通讯作者	Zhao, Wenzhi
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2019
卷号	577
英文摘要	Mongolian pine (Pinus sylvestris var. mongolica) has been widely used in vegetation restoration and for windbreaks in sandy regions of northern China where water is the principal factor limiting tree survival and growth. An understanding of water use in Mongolian pine plantations is critical for effective vegetation restoration. To determine water sources in a Mongolian pine plantation, we investigated the stable isotopic ratios of delta O-18 and delta D in precipitation, groundwater, in soil water in different soil layers, and in tree xylem at different tree ages along a precipitation gradient and in different micro-landforms. The results indicated that the main water sources for Mongolian pine were precipitation-derived shallow soil water in semi-humid regions and that the contribution proportion decreased with an increase in tree age. With reduced precipitation in semi-arid and arid regions, contribution of deep soil water to Mongolian pine water use gradually increased, and differences in soil water contribution among trees due to tree age also significantly increased. Water use patterns in trees planted in different micro-landforms (e.g. sand dune crest or inter-dune lowland) became more distinct as precipitation gradually decreased across humid to semiarid and arid regions. Moreover, Mongolian pine, including 15-, 20-, 25-, and 45-year-old trees, similar height and DBH without groundwater in semi-arid climate (in Ejin Horo banner), while trees planted in extremely arid climate (Linze) relied on irrigation for survival despite abundant and available groundwater at that study site. These results indicated that groundwater may be beyond reach to be a main water source for Mongolian pine trees. Soil water conditions determined the survival and sustainable growth of planted trees, especially at depths less than 1 m where soil layers were recharged mainly by precipitation. Although Mongolian pine exhibits strong ecological adaptability, a trait that makes it ideally-suited for controlling desertification in sandy regions of northern China, water stress, crown dieback, or even tree mortality are likely to occur under conditions of extremely low precipitation.
英文关键词	Mongolian pine plantation Stable isotopes Sandy soils Asian summer monsoon precipitation Water extraction depth
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000488304300024
WOS关键词	STABLE-ISOTOPES ; SEASONAL-VARIATIONS ; USE PATTERNS ; DUNE FIELD ; TREES ; PLANTS ; FOREST ; AREA ; SEPARATION ; RESPONSES
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/2XILL650/217184
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Linze Inland River Basin Res Stn, Lanzhou 730000, Gansu, Peoples R China; 2.Taiyuan Normal Univ, Sch Geog Sci, Jinzhong 030619, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Hai,Zhao, Wenzhi,He, Zhibin,et al. Variation in depth of water uptake for Pinus sylvestris var. mongolica along a precipitation gradient in sandy regions[J],2019,577.
APA	Zhou, Hai,Zhao, Wenzhi,He, Zhibin,Yan, Jialiang,&Zhang, Gefei.(2019).Variation in depth of water uptake for Pinus sylvestris var. mongolica along a precipitation gradient in sandy regions.JOURNAL OF HYDROLOGY,577.
MLA	Zhou, Hai,et al."Variation in depth of water uptake for Pinus sylvestris var. mongolica along a precipitation gradient in sandy regions".JOURNAL OF HYDROLOGY 577(2019).