Improvement of the Stand Density-Control Diagram and Construction of Yield Tables for Shii (Castanopsis spp.) Stands

概要

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This report deals with yield tables of natural shii (Castanopsis spp.) stands for timber production developed using a stand density-control diagram. Since natural hardwood stands such as shii stands don't generally have normal diameter distributions, mean diameter doesn't give appropriate information about the numbers of trees. Median or upper-hinge diameter, however, give direct information about tree number for any distribution types. In the light of the discussions, the shii stand density-control diagram was improved by replacing equivalent mean diameter lines with equivalent upper hinge lines. Then management plans for timber production were discussed and a site index table was compiled. These led to the development of yield tables for different goals of timber production goals.
森林計画学会の論文