TY - JOUR
T1 - A model for simulating transpiration of Eucalyptus salmonophloia trees
AU - Langensiepen, M.
AU - Burgess, Stephen
AU - Lambers, Hans
AU - Mitchell, Patrick
AU - Veneklaas, Erik
PY - 2006
Y1 - 2006
N2 - Understanding the water relations of Eucalyptus trees plays an important role in finding solutions to dryland salinity in southern Australia. A model for studying structure-function relationships in isolated tree crowns (radiation absorption, transpiration and photosynthesis, RATP) was parameterized to permit the seasonal transpiration course of a Eucalyptus salmonophloia tree to be quantified. Model responses to different parameterizations were tested in a sensitivity analysis. Predictive quality was mostly affected by the accuracy of information about leaf area density and stomatal responses to air vapor pressure deficit, and to a lesser extend by foliage dispersion. Assuming simple, non-synergistic influences of changes in photosynthetic active radiation and air vapor pressure deficit on stomatal transpiration control, the model was able to simulate the daily water uptake of E salmonophloia trees with reasonable predictive quality during an entire season. In order to more precisely simulate short-term (i.e. diurnal) water use dynamics, the model must be extended to account for hydraulic and chemical controls of stomatal regulation of crown energy balance.
AB - Understanding the water relations of Eucalyptus trees plays an important role in finding solutions to dryland salinity in southern Australia. A model for studying structure-function relationships in isolated tree crowns (radiation absorption, transpiration and photosynthesis, RATP) was parameterized to permit the seasonal transpiration course of a Eucalyptus salmonophloia tree to be quantified. Model responses to different parameterizations were tested in a sensitivity analysis. Predictive quality was mostly affected by the accuracy of information about leaf area density and stomatal responses to air vapor pressure deficit, and to a lesser extend by foliage dispersion. Assuming simple, non-synergistic influences of changes in photosynthetic active radiation and air vapor pressure deficit on stomatal transpiration control, the model was able to simulate the daily water uptake of E salmonophloia trees with reasonable predictive quality during an entire season. In order to more precisely simulate short-term (i.e. diurnal) water use dynamics, the model must be extended to account for hydraulic and chemical controls of stomatal regulation of crown energy balance.
U2 - 10.1111/j.1399-3054.2006.00727.x
DO - 10.1111/j.1399-3054.2006.00727.x
M3 - Article
VL - 127
SP - 465
EP - 477
JO - Physiologia Plantarum
JF - Physiologia Plantarum
SN - 0031-9317
IS - 3
ER -