森林资源二类调查系统抽样2种样地调查方法的比较与分析

发布时间：2019-02-23 19:59

【摘要】：以贵州省锦屏县第四次森林资源二类调查系统抽样为例,对角规点抽样的标准表法和圆形样地每木检尺的二元立木材积表法进行了比较和分析。结果表明:角规样地与圆形样地对总体蓄积抽样精度分别为90.28%,90.38%,均达到规定的精度要求(≥90%),总体蓄积估计值仅相差1.63%;角规样地检尺样木株数较少,外业工作量相当于圆形样地的40%左右,抽样效率较高;角规样地对大部分林分公顷株数、公顷断面积、公顷蓄积的抽样估计偏低。小班蓄积采用角规辅助调查的标准表法,总体蓄积采用圆形样地每木检尺的二元立木材积表法进行抽样控制的方法是可行的。
[Abstract]:Taking the fourth forest resources survey system sampling in Jinping County, Guizhou Province as an example, this paper compares and analyzes the standard table method of angle gauge sampling and the dual standing timber volume table method of circular sample plot. The results show that the sampling accuracy of the total volume of the angular and circular plots is 90.28% and 90.38% respectively, which both meet the required accuracy (鈮，

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