Limitation of soil moisture on the response of transpiration to vapor pressure deficit in a subtropical coniferous plantation subjected to seasonal drought

doi:10.1016/j.jhydrol.2020.125301

	Limitation of soil moisture on the response of transpiration to vapor pressure deficit in a subtropical coniferous plantation subjected to seasonal drought
	Song, Xianwei 1,2; Lyu, Sidan 1; Wen, Xuefa 1,2
刊名	JOURNAL OF HYDROLOGY
	2020-12-01
卷号	591 页码:8
关键词	Transpiration Seasonal drought Humid region Soil water supply Atmospheric water demand
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2020.125301
通讯作者	Lyu, Sidan(lvsidan@igsnrr.ac.cn) ; Wen, Xuefa(wenxf@igsnrr.ac.cn)
英文摘要	Plant transpiration accounts for > 60% of evapotranspiration and is affected by drought in various ways. Seasonal droughts are frequent in humid region, and co-occur with increasing atmospheric vapor pressure deficit (VPD) and decreasing soil moisture. Independent effects of atmospheric water demand and soil water supply on transpiration are still unclear. In this study, plant transpiration and environmental factors were monitored from April 2012 through December 2017 in a subtropical coniferous plantation, where low precipitation and high temperature occurred in summer and autumn. Our results confirmed the nonlinear relationship between atmospheric VPD and soil moisture and transpiration. A multiplicative model of atmospheric VPD and soil moisture on plant transpiration was developed to quantify their relative contributions to plant transpiration. The response of plant transpiration to atmospheric VPD or soil moisture followed an exponential function when they neither factor was limiting. Throughout the study period, atmospheric VPD and soil moisture explained on average 90.8% and 9.2% of the limitation on plant transpiration, respectively. While seasonal drought occurred during July to October, monthly mean contribution of soil moisture limitation to plant transpiration was 17.8 +/- 6.7% with a maximum daily contribution of 86.8%. Our results showed that transpiration in this subtropical coniferous plantation would be further limited by soil moisture in conditions of future climate change.
资助项目	National Key Research and Development Program of China[2017YFC0503904] ; National Natural Science Foundation of China[41807167] ; National Natural Science Foundation of China[41830860]
WOS关键词	STAND-SCALE TRANSPIRATION ; JARVIS-STEWART MODEL ; SAP-FLOW ; CANOPY CONDUCTANCE ; ATMOSPHERIC DEMAND ; ECOSYSTEM CARBON ; WATER ; EVAPOTRANSPIRATION ; PRODUCTIVITY ; SENSITIVITY
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000599757800028
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/137363]
专题	中国科学院地理科学与资源研究所
通讯作者	Lyu, Sidan; Wen, Xuefa
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Song, Xianwei,Lyu, Sidan,Wen, Xuefa. Limitation of soil moisture on the response of transpiration to vapor pressure deficit in a subtropical coniferous plantation subjected to seasonal drought[J]. JOURNAL OF HYDROLOGY,2020,591:8.
APA	Song, Xianwei,Lyu, Sidan,&Wen, Xuefa.(2020).Limitation of soil moisture on the response of transpiration to vapor pressure deficit in a subtropical coniferous plantation subjected to seasonal drought.JOURNAL OF HYDROLOGY,591,8.
MLA	Song, Xianwei,et al."Limitation of soil moisture on the response of transpiration to vapor pressure deficit in a subtropical coniferous plantation subjected to seasonal drought".JOURNAL OF HYDROLOGY 591(2020):8.