33 竹材の物理的性質に関する研究 : 第1報伊豆産モウソウチクの節部の收縮に就て

概要

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The results of a study on the shrinkage of the bamboos node (Phyllostachys pubescens MAGEL) grown at Idzu district are as follows.1) There is no relation between the shrinkage percentage (in tangential, radial and longitudinal dimension) and the direction when the stem was living and the specific gravity based on the oven dry.2) The tangential shrinkage percentage to oven dry, in outer side increases with the height of the stem.The correlation between the shrinkage, in radial and longitudinal, and the height of the stem is extremely irregular.These characters of the node resemble with the case of the internode.3) The tangential and radial shrinkage, to air dry, of a innerside are greater than those of outer side. In the case to oven dry, the shrinkage of the outer side is greater than that of inner side.4) The values of the shrinkage percentage of the node are as follows.[table]5) The tangential values of the node is greater than that of the internode, the radial one is lower, and the longitudinal one is near to that of the internode.
日本森林学会の論文
1951-04-25