A stomatal diffusion porometer

Design, calibration and field use of a stomatal diffusion porometer

by Kanemasu E. T., Thurtell G. W., Tanner C. B. (1969)

In Plant Physiol. 44: 881–885 – DOI: 10.1104/pp.44.6.881



Modifications of the design and calibration procedure of a diffusion porometer permit determinations of stomatal resistance which agree well with results obtained by leaf energy balance. The energy balance and the diffusion porometer measurements indicate that the boundary layer resistances of leaves in the field are substantially less than those predicted from heat transport formulas based on wind flow and leaf size.