Stomatal conductance of short rotation coppice based on sap flow measurements and its response to chosen meteorological variables

0390318 - ÚVGZ 2013 RIV CZ eng K - Conference Paper (Czech conference)
Orság, Matěj - Trnka, Miroslav - Fischer, Milan - Kučera, J. - Žalud, Zdeněk
Stomatal conductance of short rotation coppice based on sap flow measurements and its response to chosen meteorological variables.
MendelNet 2012 - Proceedings of International Ph.D. Students Conference. Brno: Mendelova univerzita v Brně, 2012, s. 865-873. ISBN 978-80-7375-656-7.
[MendelNet 2012. Brno (CZ), 21.11.2012-22.11.2012]
R&D Projects: GA MŠMT(CZ) ED1.1.00/02.0073; GA MŠMT(CZ) EE2.3.20.0248; GA MŠMT LH12037
Institutional support: RVO:67179843
Keywords : sap flow * canopy conductance * transpiration * short rotation coppice
Subject RIV: EH - Ecology, Behaviour

The main aim of this study was to derive stomatal conductance (gs) from sap flow measurements and explore some of possible applications of this method. Sap-flow and other meteorological variables were continuously monitored in poplar-based short rotation coppice (SRC) plantation in Bystřice nad Pernštejnem during growing season 2012. Sap flow of 8 trees was measured using heat dissipation method, then expressed as transpiration per square meter of projection area and by adding into rewritten Penman-Monteith equation the canopy conductance (gs) was obtained. Compared with direct measurements on leaf level this approach is advantageous for obtaining gs, because of integrating all leaf categories of tree or whole canopy. Further analysis also proved, that gs is strongly driven by VPD. Finally, it was found that the relationship between gs and VPD is also influenced by available soil moisture content.
Permanent Link: http://hdl.handle.net/11104/0219351