山白兰树皮率、心材率及木材密度研究

采用排水法、体积法及质量法测定了山白兰树的密度、树皮率、生材体积和树皮率。结果表明:山白兰生材密度从髓心向外呈先减少,随后略增加的趋势,随着树高的增加,生材密度减小,生材密度的平均值为0.864g.cm-3;基本密度自髓心向外呈增大趋势,随着树高增加,基本密度减小,基本密度的平均值为0.462g.cm-3;生材含水率从髓心向外呈减小的趋势,随着树高的增加,生材含水率先增加后减小,生材含水率的平均值为89.0%;树皮体积百分率及质量百分率均随着树高的增加而增加,树皮体积百分率及质量百分率平均值分别为16.2%、20.4%;心材率随着树高的增加而减少,心材百分率平均值为16.3%。

Bark and Heartwood Percentage and Density of Paramichelia baillonii

The bark and heartwood percentages and the density of Paramichelia baillonii were examined.The green volume was tested by drainage method,and bark percentage included bark volume percentage and bark quality percentage.The research showed that the green density decreased firstly,and increased from pith to sapwood.The green density decreased with the increase of height,and green density average was 0.864 g·cm-3.The basic density increased from pith to sapwood,and decreased with the increase of height,and basic density average was 0.462 g·cm-3.The moisture content of green wood decreased from pith to sapwood,and decreased firstly and increased later with the increase of height,and the average moisture content of green wood was 89.0%.The bark volume percentage and bark quality percentage increased with the increase of height,and bark volume percentage and bark quality were 16.2% and 20.4% respectively.The heartwood percentage decreased with the increase of height,and the average heartwood percentage was 16.3%.