Abstract
The single mature leaf had higher near-infrared relectance than the single young leaf. In multipleleaf, however near-infrared reflectance of the young leaf was higher than that of the mature leaf.
In order to explain the phenomenon, the seasonal spectral reflectance, transmittance and absorbance of single-leaf and multiple-leaf were measured with a spectrophotometer.
Higher near-infrared reflectance of young multiple-leaf was responsible for higher transmittance of the single young leaf than that of the single mature leaf.
The results suggest that multiple-leaf reflectance should be considered to estimate the vigor of vegetation by using the single leaf as a basic reference.
In addition, some factors which affect the spectral properties of leaves were also discussed.
