IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2015  > Vol12 No.6
Sap Flow of Abies georgei var. smithii and Its Relationship with the Environment Factors in the Tibetan Subalpine Region, China
GUO Qi-qiang; ZHANG Wen-hui
Corresponding AuthorZHANG Wen-hui
2015-11
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume12Issue:6Pages:1373-1382
Subtype期刊论文
AbstractAbies georgeivar. smithii is a dominant species playing an important role in protecting biodiversity and sustaining the forestry ecosystems in Southeastern Tibetan Plateau. Stem sap flows of five different diameters at the breast height (DBH) A. georgei var.smithii samples were monitored continuously with the thermal dissipation probe for the entire growing period in order to understand the water transportation mechanism and the effects of environmental factors on its transpiration and growth. Relative environment factors, temperature and humidity of air, photosynthetically active radiation, rainfall, and wind speed, soil moisture, etc. were measured by the automatic weather stations. Diurnal and seasonal variations in sap flow rate with the different stem diameters and their correlations with meteorological factors were analyzed. The diurnal change in sap flow velocity showed a single-peak curve at the daily time scale, whereas a lower sap flow velocity can be observed in the largest DBH sample tree at night. The maximum average velocity was observed in August, whereas the minimum velocity was observed in January, and a large amount of water evaporated in summer owing to the higher sap flow velocity. In addition, sap flow velocity was closely related to changes in the micrometeorological factors, with average sap flow velocity showing significant linear correlations with air temperature, photosynthetically active radiation, rainfall, and vapor pressure deficit of air and soil moisture.Therefore, some measures, improving the light and temperature conditions, should be taken for protecting A. georgei var.smithii population in the Tibetan Plateau.
KeywordTibet Subalpine Region Thermal Dissipation Probe Abies Georgei Var.smithii Sap Flow Velocity Environment Factor
DOI10.1007/s11629-015-3618-3
Indexed BySCI
Language英语
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/11041
CollectionJournal of Mountain Science_Journal of Mountain Science-2015_Vol12 No.6
Recommended Citation
GB/T 7714
GUO Qi-qiang,ZHANG Wen-hui. Sap Flow of Abies georgei var. smithii and Its Relationship with the Environment Factors in the Tibetan Subalpine Region, China[J]. Journal of Mountain Science,2015,12(6):1373-1382.
APA GUO Qi-qiang,&ZHANG Wen-hui.(2015).Sap Flow of Abies georgei var. smithii and Its Relationship with the Environment Factors in the Tibetan Subalpine Region, China.Journal of Mountain Science,12(6),1373-1382.
MLA GUO Qi-qiang,et al."Sap Flow of Abies georgei var. smithii and Its Relationship with the Environment Factors in the Tibetan Subalpine Region, China".Journal of Mountain Science 12.6(2015):1373-1382.
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