木材の用途と統計的にみたこれに利用される木材の材質

Abstract

未利用樹種の適正用途を見出すシステムに必要な基礎資料を得るため, 現在すでに用途および材質が報告されている樹種について、文献資料に基づき, 統計的手法を用いて用途とこれに経験的に利用されている樹種の材質との関係を解析した。各用途に利用されている樹種の共通性にしたがって用途間の類似性を求め, これに従って用途の分類を行なった。ついで各用途に利用されている樹種群についての各特性値の頻度分布と全樹種についての頻度分布とを比較し, その用途に利用されている樹種群に特徴的な特性とその頻度の高い級を求めた。これらの結果をもとに, ある用途に利用される樹種に共通する材質の特徴を明らかにした。

In this paper a process to find the requirements of specific end-uses for the end-use assessing system of less-known species is discussed. The philosophy of the method is that the requirements must be characterized by the wood properties possessed in common to the species group which are reported to be empirically utilized for the use. If the properties are detected, the new species possessing them will be suitable for the use. Information on end-uses and properties of 332 species were collected from several publications. First, 33 uses listed were classifed accordig to the similarity defined as the ratio of species used commonly between two uses. Then the correlation between the empirical uses and the properties of wood were analysed. On each use the grade distributions of 23 anatomical, physical, mechanical and processing properties of species being utilized for the use were compared with those of whole species and the difference was analyzed with x-square test. The wood qualities characterizing the species group utilized for the use were detected as the quality grade where the frequency was higher than on the whole species.