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Growing Season Stem Water Status Assessment of Qinghai Spruce through the Sap Flow and Stem Radial Variations in the Qilian Mountains of China
Tian, Quanyan1,4; He, Zhibin1; Xiao, Shengchun2; Du, Jun1; Peng, Xiaomei3; Chen, Longfei1; Lin, Pengfei1,4; Zhu, Xi1,4; Ding, Aijun1,4
2018
Source PublicationFORESTS
ISSN1999-4907
Volume9Issue:1Pages:14
Corresponding AuthorHe, Zhibin(hzbmail@lzb.ac.cn)
AbstractGlobal climate change is likely to change precipitation patterns with consequences for tree water use and growth in semi-arid areas. However, little is known about the effects of variability in precipitation on growth- and water-related physiological processes of native trees in dry areas of northwestern China. In this study, sap flow and stem radial variability in four Qinghai spruce trees (Picea crassifolia) were monitored in the Qilian Mountains, China. Tree water deficit (W) and basal area increment (BAI) were calculated using stem radial variation; water-use efficiency (WUE) was then estimated as the ratio of BAI and sap flow (Jt). The results showed that sap flow density (Js) increased logarithmically with increasing W when W < 50 m, and then gradually stabilized. Multiple factor generalized additive models (GAM) showed that Js was closely related to all measured environmental variables except for daily mean temperature and relative air humidity. W was related to the minimum daily temperature and soil water content. WUE exhibited higher values in early July. Low WUE was observed under conditions of prolonged dry weather, but it quickly increased during rainy days. WUE decreased after precipitation events due to high transpiration. We concluded that, in these semi-arid areas, precipitation is the most important controlling factor in tree growth and transpiration.
KeywordQinghai spruce stem radial changes sap flow environmental factors water-use efficiency
DOI10.3390/f9010002
WOS KeywordCENTRAL TYROLEAN ALPS ; HEIHE RIVER-BASIN ; ARID NORTHWESTERN CHINA ; DESERT RIPARIAN FOREST ; PICEA-CRASSIFOLIA ; ENVIRONMENTAL-FACTORS ; POPULUS-EUPHRATICA ; PINUS-CEMBRA ; CANOPY CONDUCTANCE ; TEMPORAL DYNAMICS
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41522102] ; National Natural Science Foundation of China[41601051] ; National Key Research and Development Program of China[2016YFC0501001] ; Funds for Creative Research Groups of China[41621001]
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Program of China ; Funds for Creative Research Groups of China
WOS Research AreaForestry
WOS SubjectForestry
WOS IDWOS:000424115000002
PublisherMDPI AG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/57119
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHe, Zhibin
Affiliation1.Chinese Acad Sci, Linze Inland River Basin Res Stn, Chinese Ecosyst Res Network, Key Lab Ecohydrol Inland River Basin,Northwest In, Lanzhou 730000, Gansu, Peoples R China
2.Chinese Acad Sci, Key Lab Ecohydrol Inland River Basin, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China
3.Chinese Acad Sci, Key Lab Desert & Desertificat, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Tian, Quanyan,He, Zhibin,Xiao, Shengchun,et al. Growing Season Stem Water Status Assessment of Qinghai Spruce through the Sap Flow and Stem Radial Variations in the Qilian Mountains of China[J]. FORESTS,2018,9(1):14.
APA Tian, Quanyan.,He, Zhibin.,Xiao, Shengchun.,Du, Jun.,Peng, Xiaomei.,...&Ding, Aijun.(2018).Growing Season Stem Water Status Assessment of Qinghai Spruce through the Sap Flow and Stem Radial Variations in the Qilian Mountains of China.FORESTS,9(1),14.
MLA Tian, Quanyan,et al."Growing Season Stem Water Status Assessment of Qinghai Spruce through the Sap Flow and Stem Radial Variations in the Qilian Mountains of China".FORESTS 9.1(2018):14.
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