干旱区生态环境知识资源中心(Arid): Patterns and drivers of seasonal water sources for artificial sand-fixing plants in the northeastern Mu Us sandy land, Northwest China

Arid

DOI	10.1016/j.pedsph.2023.03.007
	Patterns and drivers of seasonal water sources for artificial sand-fixing plants in the northeastern Mu Us sandy land, Northwest China
	Pei, Yanwu; Huang, Laiming; Shao, Mingan; Wang, Jiao; Zhang, Yinglong
通讯作者	Huang, LM
来源期刊	PEDOSPHERE
ISSN	1002-0160
EISSN	2210-5107
出版年	2024
卷号	34 期号:1 页码:63-77
英文摘要	Understanding plant water-use patterns is important for improving water-use efficiency and for sustainable vegetation restoration in arid and semi-arid regions. However, seasonal variations in water sources and their control by different sand-fixing plants in water-limited desert ecosystems remain poorly understood. In this study, stable isotopic ratios of hydrogen (delta H-2) and oxygen (delta O-18) in precipitation, soil water, groundwater, and xylem water were determined to document seasonal changes in water uptake by three representative plant species (Pinus sylvestris var. mongolica Litv., Amygdalus pedunculata Pall., and Salix psammophila) in the northeastern Mu Us sandy land, Northwest China. Based on the depth distribution and temporal variation of measured gravimetric soil water content (SWC), the soil water profile of the three species stands was divided into active (0.01 g g(-1) < SWC < 0.08 g g(-1), 20% < coefficient of variation (CV) < 45%), stable (0.02 g g(-1) < SWC < 0.05 g g(-1), CV < 20%), and moist (0.08 g g(-1) < SWC < 0.20 g g(-1), CV > 45%) layers. Annually, P. sylvestris, A. pedunculata, and S. psammophila obtained most water from deep (59.2% +/- 9.7%, moist layer and groundwater), intermediate (57.4% +/- 9.8%, stable and moist layers), and shallow (54.4% +/- 10.5%, active and stable layers) sources, respectively. Seasonally, the three plant species absorbed more than 60% of their total water uptake from the moist layer and groundwater in the early (June) dry season; then, they switched to the active and stable layers in the rainy season (July-September) for water resources (50.1%-62.5%). In the late (October-November) dry season, P. sylvestris (54.5%-66.2%) and A. pedunculata (52.9%-63.6%) mainly used water from stable and moist layers, whereas S. psammophila (52.6%-70.7%) still extracted water predominantly from active and stable layers. Variations in the soil water profile induced by seasonal fluctuations in precipitation and groundwater levels and discrepancies in plant phenology, root distribution, and water demand are the main factors affecting the seasonal water-use patterns of artificial sand-fixing plants. Our study addresses the issue of plant water uptake with knowledge of proportional source-water use and reveals important implications for future vegetation restoration and water management in the Mu Us sandy land and similar desert regions around the world.
英文关键词	desert ecosystem MixSIAR model plant water uptake soil moisture stable isotopes vegetation restoration water-use efficiency
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001186864000001
WOS关键词	RATIO MASS-SPECTROMETRY ; STABLE-ISOTOPE ANALYSIS ; RING-DOWN SPECTROSCOPY ; VAR. MONGOLICA TREES ; SOIL-WATER ; DIFFERENT AGES ; IN-DEPTH ; DESERT ; GROUNDWATER ; VEGETATION
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405039
推荐引用方式 GB/T 7714	Pei, Yanwu,Huang, Laiming,Shao, Mingan,et al. Patterns and drivers of seasonal water sources for artificial sand-fixing plants in the northeastern Mu Us sandy land, Northwest China[J],2024,34(1):63-77.
APA	Pei, Yanwu,Huang, Laiming,Shao, Mingan,Wang, Jiao,&Zhang, Yinglong.(2024).Patterns and drivers of seasonal water sources for artificial sand-fixing plants in the northeastern Mu Us sandy land, Northwest China.PEDOSPHERE,34(1),63-77.
MLA	Pei, Yanwu,et al."Patterns and drivers of seasonal water sources for artificial sand-fixing plants in the northeastern Mu Us sandy land, Northwest China".PEDOSPHERE 34.1(2024):63-77.