A comparison of photosynthesis-dependent stomatal models using twig cuvette field data for adult beech (Fagus sylvatica L.)

作者：de Beeck Maarten Op^*; Loew Markus; Deckmyn Gaby; Ceulemans Reinhart

来源：Agricultural and Forest Meteorology, 2010, 150(4): 531-540.

DOI：10.1016/j.agrformet.2010.01.018

• Stomatal conductance
• Atmospheric humidity
• Soil water potential
• Leaf water potential
• Leaf surface CO(2) concentration
• Leaf intercellular CO(2) concentration

Six photosynthesis-dependent stomatal models were tested and compared against twig cuvette gas exchange data for adult common beech (Fagus sylvatica L). The models differed in the use of (1) either leaf surface CO(2) concentration (C(s)) or leaf intercellular CO(2) concentration (C(i)), and of (2) either measured environmental humidity variables or a crudely calculated leaf water potential to simulate the effect of drought stress on stomatal conductance. The models applying C(s) performed slightly better than the models applying C(i). The models based on environmental humidity variables performed distinctly better than the models applying a calculated leaf water potential. Several explanations for the observed performance differences between models applying C(s) or C(i) were brought forward and discussed.

• 出版日期2010-4-15