干旱区生态环境知识资源中心(Arid): Stand transpiration and canopy conductance dynamics of Populus popularis under varying water availability in an arid area

Arid

DOI	10.1016/j.scitotenv.2023.164397
	Stand transpiration and canopy conductance dynamics of Populus popularis under varying water availability in an arid area
	Du, Jiali; Dai, Xiaoqin; Huo, Zailin; Wang, Xingwang; Wang, Shuai; Wang, Chaozi; Zhang, Chenglong; Huang, Guanhua
通讯作者	Dai, XQ
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2023
卷号	892
英文摘要	As a tree species of shelterbelts, Populus popularis maintains significant ecological functions in arid and semiarid areas. However, stand transpiration (T) and canopy conductance (gc) dynamics of P. popularis are unclear in arid irrigated areas with shallow groundwater fluctuations. To better understand the responses of T and gc to meteorological factors, soil water, and shallow groundwater in arid areas, we observed the environmental conditions and sap flow of P. popularis, and quantified T and gc in three growing seasons of 2018-2020 in a typical arid area of China. Results showed T and gc ranged from 0.18 to 6.11 mm day-1 and 2.26-12.54 mm s-1 in 2018-2020, respectively. Solar radiation and vapor pressure deficit (VPD) were major drivers of Tat daily scales. It was consistently found that T exponentially decreased with increasing groundwater table depth (GTD) and decreasing reference evapotranspiration in three years. gc is primarily influenced by VPD and is positively related to soil water content in 0-30 cm soil layer (SWC0-30cm). Moreover, low SWC0-30cm and deepening GTD jointly decreased T and gc by 22.45 % and 30.41 %, respectively. The response of gc to VPD was susceptible to groundwater fluctuations, and the synergistic influences of VPD and GTD on gc could be well described by the logarithmic function, especially in 2019. The sensitivity of gc to VPD and its variations under different environmental conditions suggested that a flexible stomatal regulation of transpiration occurred in the observed P. popularis with the arid climate and shallow groundwater. These findings provided the essential basis for the water use strategy of P. popularis and stand water resources management in arid regions.
英文关键词	Stand transpiration Canopy conductance Vapor pressure deficit Soil moisture Groundwater table depth
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001053065000001
WOS关键词	INLAND RIVER-BASIN ; STOMATAL CONDUCTANCE ; SAP FLOW ; SOIL-MOISTURE ; DECOUPLING COEFFICIENT ; RIPARIAN COTTONWOODS ; SHELTER-BELT ; RAIN-FOREST ; SCOTS PINE ; TREES
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/2XILL650/398536
推荐引用方式 GB/T 7714	Du, Jiali,Dai, Xiaoqin,Huo, Zailin,et al. Stand transpiration and canopy conductance dynamics of Populus popularis under varying water availability in an arid area[J],2023,892.
APA	Du, Jiali.,Dai, Xiaoqin.,Huo, Zailin.,Wang, Xingwang.,Wang, Shuai.,...&Huang, Guanhua.(2023).Stand transpiration and canopy conductance dynamics of Populus popularis under varying water availability in an arid area.SCIENCE OF THE TOTAL ENVIRONMENT,892.
MLA	Du, Jiali,et al."Stand transpiration and canopy conductance dynamics of Populus popularis under varying water availability in an arid area".SCIENCE OF THE TOTAL ENVIRONMENT 892(2023).