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比较了Kozak(1988),Bi(2000)和Fang等(2000)的削度模型,形成了橡树商品材材积核算系统。在所研究的不同树龄、不同密度的松树.橡树混交林内,采集了298株橡树削度数据。结果表明,Fang等(2000)建立的可兼容分段模型可以很好地描述实验数据,可用于估测树木在指定树高的直径、树高.指定直径比、商品材材积量和总体积。本研究建立的公式可作为该研究区内森林调查的基本工具,简便、易于操作。统计分析结果表明,尽管本研究所建立的公式具有局地适应性,但仍可应用于其他区域。
The tapping models of Kozak (1988), Bi (2000) and Fang et al. (2000) are compared to form an oak tree calculus accounting system. A total of 298 oak cuttings were collected from pine-oak mixed forests of different ages and densities. The results show that the compatible segmentation model established by Fang et al. (2000) can well describe the experimental data and can be used to estimate the tree diameter, tree height, specified diameter ratio, commodity timber volume and total volume of trees. The formula established in this study can be used as the basic tool for forest investigation in the study area, which is simple and easy to operate. The statistical analysis shows that although the formulas established in this study have local adaptability, they can be applied to other regions.