Abstract
A basic calculating unit is needed to estimate an amount of carbon fixation by planted trees in urban area, therefore three species, fifteen planted trees were analyzed by means of the stem analysis, and the growth process were clarified. Wood Growth had close correlations to Tree Height and Trunk Diameter at the height of 1.2m, and two Regression Curve Expressions were made. Furthermore, Tree Height and Trunk Diameter were proportional to Tree Age. According to these correlations, the expressions for calculation of Annual Wood Growth were made. The Annual Wood Growths are useful as a basic calculating unit for various size trees of each species. The form of expressions are as follows, Y=a {(X+c)b-Xb}; Y: Annual Wood Growth (kg/y); X: Tree Height (m) or Trunk Diameter (cm) at the height of 1.2m; a, b and c: constants as each species.
