Evaluation of non-destructive Meyer method for determination of bark volume of beech (Fagus orientalis Lipsky) in different geographical aspects

The non-destructive Meyer method was evaluated to determine the bark volume of beech (Fagus orientalis Lipsky) stands in north of Iran. The sample size was ۱۸۵ standing trees collected from ۴ geographical aspects (north, south, west and east) aspects. The constant k values and bark thickness (۲e mm) of ۱۸۵ standing trees were used to calculate the bark volume by the Meyer method. In this study, ۴۰ trees were randomly selected from among the felled trees and analyzed for evolution of non-destructive Meyer method. As a result, ۶۶۸ diameters and ۱۲۳۶ bark thicknesses were measured out of ۴۰ felled trees. The bark volumes were calculated by non-destructive Meyer and sums of integration methods. The results indicated no significant differences in volume estimates based on two methods (P = ۰.۸۱۶, two-tailed test), There were no significant differences in Levene?s test for equality of variances between the two methods (P=۰.۵۷۶, two-tailed test). The bark volume variations were significantly different in the geographical aspects. Results of this study can be important for silvicultural planning and natural forest management.

کلیدواژه ها:

Bark thickness ، Beech (Fagus orientalis Lipsky) ، Meyer method ، Silvicultual