系统抽样调查在森林蓄积量测定中的应用

以江苏省农博园湿地松生态林区典型地段为调查研究对象,应用系统抽样的方法进行布点,样地测设及调查.运用CAD绘图软件对调查总体求算面积,运用一元材积表对调查结果进行汇总,并探讨了不同形状样地调查数据的抽样估计精度.结果表明：利用CAD绘图软件绘图并求算面积的方法较传统手工绘图的方法简便,准确.不同形状样地的调查数据的估计精度非常接近,考虑到方形样地测设较简单,因此,建议在森林的系统抽样调查中选用方形样地.

Application of Systematic Sampling Survey in Measurement of Forest Stock Volume

Taking typical ecological forest area in agriculture expo-garden of Jiangsu Province as research object, and using the systematic sam- piing method, sample test and survey, this paper discussed the different shape plot sampling estimation accuracy of survey data with the aid of CAD plotting software. Single entry volume table was used to sum up survey results. Results indicated that the method of using CAD plotting soft- ware is more simple and accurate than traditional manual plotting method. Estimation accuracy of survey data of sample land with different shape is very close. Since measurement of square sample land is simple, it is recommended to select square land in systematic sampling survey.