树干解析中圆盘直径及树皮断面积精准测定的方法

被引：19

作者：

刘琪璟

机构：

[1] 北京林业大学林学院省部共建森林培育重点实验室

来源：

生态学杂志 | 2009年 / 28卷 / 06期

关键词：

直径校正; 树皮断面积; 年轮; 树干解析;

D O I：

10.13292/j.1000-4890.2009.0193

中图分类号：

S758 [森林计测学（测树学）];

学科分类号：

090704 ;

摘要：

讨论了树干解析中被忽略的2个问题,即直径和树皮体积的测定方法的严密性。传统的方法是选取南北和东西二个方向测定后平均,但因其值小于实际值而造成材积的低估;树皮断面积的计算是用带皮断面积减掉去皮断面积。为了减少森林生产力测定的不确定性,本研究提出新的方案测定各年度的直径以及树皮断面积。利用校正系数对传统方法测定的结果进行校正,或者在直径测定时采用符合实际直径的方位;对于有裂隙的树皮(假设内皮厚度为0)的断面积,把目前的去皮半径当作带皮半径进行计算,而不是带皮断面积和去皮断面积之差。

引用

页码：1194 / 1200

页数：7

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