用林分密度控制图编制可变密度收获表的研究

以林分密度效应规律为基础，编制杉木林分密度控制图。为提高精度，用改进单纯形法对等树高线和等直径线作了进一步的优化。精度检验表明林分密度控制图适用。引入林分密度指数，将林分密度控制图导成可变密度收获表，保证了图表之间输出结果的一致性，为可变密度收获表的编制提供了一种方法。

Study on Drawing up Variable-density Yield Tables with the Control Chart of Stand Density

This paper drew up the control chart of stand density for Chinese fir based on the effect law of stand density. In order to raise the precision, the paper further optimized equal height curve and equal diameter curve with corrected simplex method, the precision test showed that the control chart of stand density was fit. Based on foregoing information, density index of stand was led into drowing control chart of stand density into variable-density yield table so that the outputting results between chart and table were correspondant, this provided a method for drawing up variable-density yield tables, simplex method.