枝張りの程度のあらわしかた II : スギ"クモトオシ"とヒウガアカマツでの結果

概要

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In the former paper, the author described the results from the survey on Pinus densiflora in Kirisima area, and stated that the degree of crown slenderness could be described as K's in the following formula : K's/100=log S-0.803(log D-1)S : diameter of crown (m)D : diameter of stem at breast height (cm) Present survey on a clone of Cryptomeria japonica, however, showed that the formula could not be applied on this material. Calculation gave the new coefficient for log D.This disagreement may suggest the absence of universal coefficient among tree species or races. Survey on Hyuuga Pine, local race of Pinus densiflora, however, showed that the new coefficient, 0.51,was more likely to apply than the old one, 0.803. Moreover, it became clear that the former conclusion depended upon an unacertained hypothesis.Formula which denote "spacing value", therefore, should be changed as follow : K's/100=log S-0.51(log D-1)
日本森林学会の論文
1954-05-25