Abstract
The difference of budburst phenology in two years was analyzed by comparing canopy color change of 50 individuals of Japanese mountain cherry tree (Cerasus jamasakura (Siebold ex Koidz.) H. Ohba var. jamasakura) using digital colorimetrical images. We identified that a sequence of L*a*b* corresponded to visually observed budburst phenology and the measurement method of digital colorimetrical images was valid for assessment of individual budburst phenology. The pattern of time series of standard deviation (SD) of L*a*b* in the group between 2010 and 2011 was matched after compensation of time-lag days. On the day of maximum SD, the value of L*a*b* between two years was highly correlated. We pointed out that the earliness of canopy colorimetrical changes related to budburst phenology in individuals is yearly stable characteristics.
