马尾松人工林标准树高曲线模型的研究

Study on Standard Height Curve Model of Masson Pine Planted Forests

为准确预测林分各径阶高，用试验林和固定样地资料，分析了树高曲线与林龄、立地和密度的关系。结果表明树高曲线随林龄、立地指数的增大，曲线向右上方移动，而与林分密度无关。分析了国内外树高曲线模型研究状况，针对研究中存在的问题，采用再次参数化方法，把立地指数、林龄引入树高曲线模型，创建１３个新模型。用２００块标准地树高曲线资料，采用迭代法分别进行了拟合。经比较，选出有生物学意义扩展后Ｒｉｃｈａｒｄｓ函数，建立了贵州省马尾松人工林标准树高曲线模型（以林龄、立地指数和胸径为自变量）。经检验。

In order to forecast accurately height of each diameter class,the relationship between height curve,stand age,site and stand density was analysed using data of sample stand and permanent sample plot The results indicated close relations between height curve and stand age,site Height curve moved up right with the increase of stand age and site,and was not related to stand density With a view to solving existing problems,the author introduced the site and stand age into the height curve model,establishing 13 new height curve models by means of double regression Height curve models were imitated via iterative method using data of 200 sample plots By comparison,Richards function with biology meaning was selected as the standard model,and the standard height curve equation of masson pine plantations in Guizhou was suggested The forecast equation proved applicable in the regions