45 スギ, ヒノキの枝下高と樹高, 胸高直径との関係に就ての研究

概要

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1. The single correlations between the clear length and the height at single trees of Sugi (Cryptomeria japonica D. Don) or Hinoki (Chamaecyparis obtusa S. et Z) are positive, but the partial correlations are far high degree. 2. The single correlations between the clear length and diameter breast high are not distinctive, but this is partly dew to the influence of the height. Therefore the partial correlations are nagative and high degree. 3. In other word, the diameter breast high grows with the hight as natural result of growing phenomena, and the otherside it decrease with the increase of the clear length which is the result of crown cover. 4. As the result of analysis of covariance, the diameter breast high (D) and the clear length are expressed by following formulas, and the probable errors are estimable : Sugi : - logD=1.2843+1.8464 logH-0.5156 logh (P.E.=±11%) logh=1.1157+1.5880 logH-0.4349 logD (P.E.=±12%) Hinoki : - logD=0.1603+1.1712 logH-0.3019 logh (P.E.=±10%) logh=1.3156+1.9508 logH-0.5759 logD (P.E.=±14%)
一般社団法人日本森林学会の論文
1951-07-25