A technique for determining resistance to mass transfer through the boundary layers of plants with complex structure.
Abstract
Shoots of Picea sitchensis and Calluna vulgaris were covered with a thin layer of gypsum, which held sufficient water to give good estimates of evaporation rate and surface temperature in a wind tunnel and an assimilation chamber. The relation between wind speed and the aerodynamic resistance at the boundary layer to the transfer of water vapour from the shoot (ra), and the magnitude of the ra values, suggest that this technique provides valid estimates of the ra of plants with complex structure. KEYWORDS: plant \ physiology \ plant physiology \ physiology \ plant physiology \ physiology \ plant physiology \ physiology \ plant physiology \ study methods water uptake \ movement \ physiology \ plant physiology \ physiology \ plant physiology \ water measurement \ leaf water potential \ Picea sitchensis