抽样调查中复合样地设计方法研究

A Study on Dsigning Complex Plot in Sampling Survey

通过对现行各种样地设计方法进行分析比较 ,提升出一种一般意义上的样地设计方法—复合样地设计法 ;复合样地设计的基本思想是 ,将样木划分成n类 ,在固定面积为S的样地上套设n个面积不同的子样地 ,每一类样木对应于一个子样地 ,在各子样地上分别获得各类样木的估计值 ,经换算后获得整个样地的估计值 ;文中给出多种同时具有角规样地和固定样地优点的具体复合样地形式 ,并以贵州省的方形样地材料予以验证。

Based on analysis and comparison of various plots in practice,a new concept of “complex plot”is presented.The basic idea for designing complex plot is:Firstly,all sample trees are classified into n categories,and n sud-plots are designed on the plot,that means each category of trees has a corresponding sub-plot.Secondly,the estimate of all categories of trees are obtained from all sub-plots.and the estimate of the plot is obtained by adding up all estimates for sub-plots.In this paper,several complex plots are presented which can combine the advantages of both angle gauge plot and area-fixed plot,and an example is provided for demonstration and verification by using the data of square plots in Guizhou.