Sap flow monitoring of two Australian native tree species in a suburban setting : Implications for tree selection and management

Copyright © 2022 Elsevier B.V. All rights reserved.

Détails bibliographiques
Publié dans:Plant science : an international journal of experimental plant biology. - 1985. - 317(2022) vom: 23. Apr., Seite 111194
Auteur principal: Sun, Xi (Auteur)
Autres auteurs: Li, Jie, Cameron, Donald, Moore, Gregory
Format: Article en ligne
Langue:English
Publié: 2022
Accès à la collection:Plant science : an international journal of experimental plant biology
Sujets:Journal Article Clay soil Heat ratio method Plant transpiration Sap flow Thermal diffusivity Tree transpiration Water 059QF0KO0R
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520 |a Sap flow, the transport of fluid in the water-conducting xylem tissues of plants, is commonly measured in studies of plant-water relationships by the heat pulse velocity method. Publications have been rare of long-term sap flow measurements for individual trees in a suburban environment. Plant-water relations in urban settings are essential for promoting urban greening where there is a perceived danger to infrastructure and buildings from planting trees in streets on clay sites. The function of residential houses built on reactive clays can be significantly impaired and walls of buildings cracked if considerable amounts of water are extracted from the soil by the root system of a tree or a group of trees in close proximity, leading to localised soil shrinkage settlement. This part of the wider study aimed to monitor sap flow of eight individual Australian native trees from two species using the heat ratio method (HRM) in the field over 12 months. The analysis of monthly sap flow volume showed a similar pattern for all monitored trees, although daily water demand varied substantially. Methods for estimating tree leaf surface area, crown shape and crown volume were investigated and the equation for calculating thermal diffusivity (k) and sap flow velocity on the basis of the HRM was reviewed. It has been proposed that k may vary substantially depending on how thermal conductivity (K) is estimated, which could lead to significant discrepancies for estimations of plant transpiration. Two K models (KHog and KVan) were investigated and it was found that the impact on mean daily sap volume was negligible for the trees in this study 
650 4 |a Journal Article 
650 4 |a Clay soil 
650 4 |a Heat ratio method 
650 4 |a Plant transpiration 
650 4 |a Sap flow 
650 4 |a Thermal diffusivity 
650 4 |a Tree transpiration 
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700 1 |a Li, Jie  |e verfasserin  |4 aut 
700 1 |a Cameron, Donald  |e verfasserin  |4 aut 
700 1 |a Moore, Gregory  |e verfasserin  |4 aut 
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