Arid
DOI10.3390/f9010002
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
通讯作者He, Zhibin
来源期刊FORESTS
EISSN1999-4907
出版年2018
卷号9期号:1
英文摘要

Global 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.


英文关键词Qinghai spruce stem radial changes sap flow environmental factors water-use efficiency
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000424115000002
WOS关键词HEIHE RIVER-BASIN ; DESERT RIPARIAN FOREST ; PICEA-CRASSIFOLIA ; ENVIRONMENTAL-FACTORS ; PINUS-CEMBRA ; POPULUS-EUPHRATICA ; CANOPY CONDUCTANCE ; TEMPORAL DYNAMICS ; USE EFFICIENCY ; SOIL-MOISTURE
WOS类目Forestry
WOS研究方向Forestry
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/209339
作者单位1.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
推荐引用方式
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],2018,9(1).
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).
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).
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