摘要
利用试验林和固定样地资料，分析了树高曲线与林龄、立地、密度的关系，得出树高曲线与林龄、立地关系密切，随林龄、立地指数的增大，曲线向右上方移动；而与林分密度关系不大。分析了国内外在树高曲线模型方面研究情况。针对以往研究中存在的问题，采用再次参数化方法，把立地指数、林龄引入树高曲线模型，创建了１３个树高曲线模型。用２４５块标准地树高曲线资料，采用迭代法分别进行了拟合。经模型比较，选出具有生物学意义扩展后的Ｒｉｃｈａｒｄｓ函数，建立了贵州省杉木人工林标准树高曲线方程（以林龄、立地指数和径阶中值为自变量）。
In order to forecast accurately height of each diameter class, the relationship of diameter-height curve and stand age, site, stand density was analysed using data of sample stand and permanent sample plot,the results showed that the diameter-height curve and stand age, site is closely, diameter- height curve move up-right with the increase of stand age and site, it has not obvious regularity with stand density. The author analysed international study condition on diameter-height curve. according to existing question, site and stand age were introduced in diameter-height curve model, with method of doubl regression. 13 diameter-height curve new models were established. Diameter-height curve models were imitated using data of 245 sample plot by iterative method. By comparing the models, Richards function hasing biology meaning and revised was selected, standard diamter-height curve equation of Chinese fir plantations in Gujzhou province was established (the independent variable of equation is stand age, site index and breast height diameter).By verified, this equation may be applied in the study regions.
基金
国家重点攻关课题贵州子专题
关键词
杉木
树高曲线
模型
人工林
chinese fir
diameter-height curve
model
