Abstract
The effective characteristics of spectral reflectivity for evaluating chlorophyll content on a leaf areal basis were investigated in eight species of dicotyledonous trees and in sweet potato. Using regression equation between chlorophyll content and reflectivity ratio of rNI'/rG', where rNI' and rG' are the spectral reflectivity at 800 nm and 550 nm, respectively, the chlorophyll content of the leaf was estimated in May to December. The obtained value showed the standard error of about 5μg⋅cm-2, which is about 10% of the mean chlorophyll content of all leaves examined (sample size: 147), irrespective of species and seasons. The correlation equation for the estimation was different from that for monocotyledonous plants reported previously.
