树干材积

顶芽数在等级苗间没有明显的差异，Ⅰ级苗（超级苗）造林后6年其树高、胸径生长保持优势，树干材积比林分平均木材积大14.5%。

The height and diameter breast height of graded seedling I ( predominant seedling ) have been maintaining a dominance after the planting of six years , and its stem volume is 14.5 % more than that of the average of stand .

杉木树干材积分析

Stem Volume Analysis for Cunninghamia lanceolata

指森林面积上生长着的林木树干材积总量，是反映一个国家或地区森林资源总规模和水平的重要指标。

Refers to total stock volume of wood growing in forest area , which shows the total size and level of forest resources of a country or a region .

给出了按不同的区分方法和求积算法计算树干材积的方法、程序及相应的材积误差率。

It shows the methods to calculate the trunk volume by different sectional ways and product calculation methods and programs , as well as relevant error ratios of timber volume .

马尾松树干干形及材积估测的研究

Study on the stem form of Pinus massoniana and estimation of Standing Volume

为了测定立木的材积，该文应用孔兹干曲线方程建立了表达整株树干形状的连续干曲线方程组和树干材积的精准区分求积式。

In order to survey standing wood volume , based on Kunze Trunk Curve Equation , the authors built another continuous trunk curve equation set to describe whole trunk form .