竹材密度的研究

本文对10个竹种竹材的实质密度、绝干密度和孔隙度进行了研究。结论如下:(1)竹材的实质密度与木材非常接近,在1.481～1.514g/cm~3之间,平均约为1.500g/cm~3;其变化规律:基部和梢部、内层和外层分别小于中部与中层;丛生竹的实质密度略大于同龄散生竹;(2)竹材的绝干密度约为0.819g/cm~3,表现为从基部到梢部递增,孔隙度变化正相反,从基部到梢部递减,二者服从一元线性回归Y=99.95-66.726X关系。

A STUDY ON BAMBOO DENSITY

Substantial density, absolute dry density and porosity of bamboos from 10 species of bamboos were studied. The results are as follows: 1. The substantial densities of bamboos are very approximate to ones of woods, which range between 1.481g/cm~3 and 1.514g/cm~3. 1.500g/cm~3 is their average. Its change pattern is that the base and tip parts, the outlayer and innerlayer are larger than the middle part and the middle layer respectively. The substantial densities of the sympodial bamboos are a little larger than those of the monpodial bamboos. 2. The absolute dry density of bamboo is about 0.819g/cm~3 for average, which increases from the base to the tip, but on the contrary, for the porosity. They both are related by the regression equation: Y = 99.95-66.726X.