干旱区生态环境知识资源中心(Arid): Effects of meteorological factors and groundwater depths on sap flow density of Populus euphratica in a desert oasis, Taklamakan Desert, China

Arid

DOI	10.3389/fpls.2024.1330426
	Effects of meteorological factors and groundwater depths on sap flow density of Populus euphratica in a desert oasis, Taklamakan Desert, China
	Wan, Yanbo; Peng, Lei; Anwaier, Abudureyimu; Shi, Haobo; Li, Dinghao; Ma, Yu; Shi, Qingdong
通讯作者	Shi, QD
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2024
卷号	15
英文摘要	Accurate estimation of desert vegetation transpiration is key to regulating desert water resources of desert ecosystems. Sap flow density (SFD) can indirectly reflect a tree's transpiration consumption, and it has been affected by climate warming and groundwater depths in desert ecosystems. Sap flow responses to meteorological conditions and groundwater depths are further affected by tree of different sizes. However, how meteorological factors and groundwater depths affects tree sap flow among tree sizes remains poorly understand. In this study, a 50 x 50 m P. euphratica stand was selected as a sample plot in the hinterland of the Taklamakan Desert, and the SFD of P. euphratica of different sizes was measured continuously using the thermal diffusion technique from May to October of 2021 and 2022. The results showed that SFD of large P. euphratica was consistently higher than that of small P. euphratica in 2021 and 2022. and the SFD of P. euphratica was significantly and positively correlated with solar radiation (Rad) and vapor pressure deficit (VPD), and the correlation was higher than that of the air temperature (Ta) and relative humidity (RH), and also showed a strong non-linear relationship. Analysis of the hour-by-hour relationship between P. euphratica SFD and VPD and Rad showed a strong hysteresis. Throughout the growing season, there was no significant relationship between SFD of P. euphratica and groundwater depth, VPD and Rad were still the main controlling factors of SFD in different groundwater depths. However, during the period of relative groundwater deficit, the effect of groundwater depth on the SFD of P. euphratica increased, and the small P. euphratica was more sensitive, indicating that the small P. euphratica was more susceptible to groundwater changes. This study emphasized that Rad and VPD were the main drivers of SFD during the growing season, as well as differences in the response of different sizes of P. euphratica to groundwater changes. The results of the study provide a scientific basis for future modeling of transpiration consumption in P. euphratica forests in desert oases, as well as the regulation and allocation of water resources.
英文关键词	sap flow solar radiation vapor pressure deficit groundwater Populus euphratica
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:001173483100001
WOS关键词	HEIHE RIVER-BASIN ; ENVIRONMENTAL-FACTORS ; CANOPY TRANSPIRATION ; STAND TRANSPIRATION ; SOIL-MOISTURE ; WATER-USE ; TREE ; FOREST ; CONDUCTANCE ; RESPONSES
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403884
推荐引用方式 GB/T 7714	Wan, Yanbo,Peng, Lei,Anwaier, Abudureyimu,et al. Effects of meteorological factors and groundwater depths on sap flow density of Populus euphratica in a desert oasis, Taklamakan Desert, China[J],2024,15.
APA	Wan, Yanbo.,Peng, Lei.,Anwaier, Abudureyimu.,Shi, Haobo.,Li, Dinghao.,...&Shi, Qingdong.(2024).Effects of meteorological factors and groundwater depths on sap flow density of Populus euphratica in a desert oasis, Taklamakan Desert, China.FRONTIERS IN PLANT SCIENCE,15.
MLA	Wan, Yanbo,et al."Effects of meteorological factors and groundwater depths on sap flow density of Populus euphratica in a desert oasis, Taklamakan Desert, China".FRONTIERS IN PLANT SCIENCE 15(2024).