干旱区生态环境知识资源中心(Arid): Seasonal transpiration dynamics and water use strategy of a farmland shelterbelt in Gurbantunggut Desert oasis, northwestern China

Arid

DOI	10.1016/j.agwat.2024.108777
	Seasonal transpiration dynamics and water use strategy of a farmland shelterbelt in Gurbantunggut Desert oasis, northwestern China
	Xue, Bing; Jiang, Yan; Wang, Qijie; Ma, Bin; Hou, Zhen'an; Liang, Xue; Cui, Yirui; Li, Fangfang
通讯作者	Jiang, Y
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2024
卷号	295
英文摘要	Farmland shelterbelts provide an ecological barrier to oases, but their growth is inhibited or even dies under water scarcity. Therefore, it is necessary to understand the response of farmland shelterbelts to environmental changes for their own survival in order to promote the long-term healthy development of agroforestry systems and improve water management in oases in the northwest arid region. In this study, we measured the sap flow and environmental factors to determine the transpiration dynamics and its influencing factors. The seasonal variations in water use strategy of Populus alba var. pyramidalis Bunge were identified by using stable isotopes of delta 18O in xylem, soil water and groundwater coupled with the Iso-Source model. The results showed that the transpiration of the populus was significantly higher in the growing season (more than 80% of the total transpiration) than in the non -growing season, and the transpiration was closely related to air temperature, vapor pressure deficit, soil water content, and soil temperature. The water use strategy had seasonal variations. The populus obtained water predominantly from 0-40 cm soil water (approximately 75%) in the wet spring and then switched to deeper water sources (40-150 cm soil water and groundwater) as the season progressed. The contribution of deeper water sources increased to 84-92% in summer and autumn. This suggested that Populus alba var. pyramidalis Bunge has ecological plasticity, as it could explore deeper water sources as the water stress increased. The ability to switch rapidly among different water sources could put a plant at an advantage if competition for water occurs within the ecosystem. Our findings can provide insights into temporal transpiration dynamics as well as the strategy adopted by farmland shelterbelts to counteract the drought stress associated with the shallow soils in desert oasis ecosystems.
英文关键词	Ecohydrology Ecological plasticity Populus alba var. pyramidalis Bunge Stable oxygen isotope Transpiration Water use strategy
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001219203900001
WOS关键词	SAP FLOW ; STABLE-ISOTOPES ; ARID REGION ; SOIL-WATER ; POPULUS ; PATTERNS ; SHRUBS ; PRECIPITATION ; CONDUCTANCE ; TEMPERATURE
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402660
推荐引用方式 GB/T 7714	Xue, Bing,Jiang, Yan,Wang, Qijie,et al. Seasonal transpiration dynamics and water use strategy of a farmland shelterbelt in Gurbantunggut Desert oasis, northwestern China[J],2024,295.
APA	Xue, Bing.,Jiang, Yan.,Wang, Qijie.,Ma, Bin.,Hou, Zhen'an.,...&Li, Fangfang.(2024).Seasonal transpiration dynamics and water use strategy of a farmland shelterbelt in Gurbantunggut Desert oasis, northwestern China.AGRICULTURAL WATER MANAGEMENT,295.
MLA	Xue, Bing,et al."Seasonal transpiration dynamics and water use strategy of a farmland shelterbelt in Gurbantunggut Desert oasis, northwestern China".AGRICULTURAL WATER MANAGEMENT 295(2024).