The Index of Stands to Vanish

Relations with Stem-form and Growth Increment of Hinoki Stands

Abstract

The index "l/d" was called "k-ratio". "l" was the distance between a point on a stem and the top of the stem, and "d" was the diameter of the stem at the point. Next, uniform distribution of k-ratio at breast height was derived from a Hinoki stand, and a height growth curve and "k=a+bl" was derived from a sample tree which stem was analyzed. And the formulas were integrated to a stand-model, which was composed of functions about stem curve of Behre formula, stem volume, and maximum stand density. At the stand age 66, the stem volume of the model was 10% lower than the one of real stands. As a result, the model could describe a total stands with each individual stand, and it was to be improved.