内蒙古大青山华北落叶松人工林生长模型研究

利用内蒙古大青山32株华北落叶松解析木数据,分析研究华北落叶松人工林的树高、胸径、年龄、材积之间的关系,并选取对数模型、理查德模型、考尔夫方程和逻辑斯蒂方程等4个常用的生长模型对树高、胸径、材积生长量进行拟合.结果表明：效果好的生长模型分别为胸径对数模型y=-24.03＋ 11.28×Log（x＋1.99）,树高理查德模型Y=27.27×1-Exp（-0.041 ×x）]△1 5735,材积理查德模型y=7495.55×1-Exp（-0.001×x）]△3.13.经F检验（F ＜0.05） =6.94,呈显著.3个预测模型的标准误差、平均百分误差、平均绝对百分误差都非常小,平均相对误差均在±2.5％以内,预测值与实测值无显著差异（p=0.05）.

Growth Model of Lar/x principis -rupprechtii Plantation in Inner Mongolia

In this paper, the relationships among tree height, dbh, tree age and volume of Larix principis - ruppre- chtii plantation in Daqingshan mountains in Inner Mongolia have been analyzed by use of the analytic trees data from 32 stocks of Larix principis - rupprechtii. And the tree height, dbh and volume growth have been fitted by use of logarithm model, Richards function, Korf equation and logistic equation. The results show that the growth models with good effects separately are logarithm model of dbh： y = -24.03 ＋ 11.28 × Log（x ＋ 1.99）, Richards model of tree height： Y = 27.27 x 1 - Exp（ - 0. 041 x x） ] A1.5735 , Richards model of volume： y = 7495.55× 1 - Exp （ - 0.001 x x） ] Aa. 13. It shows significant by F test（ F 〈 0.05 ） = 6.94. The standard error, average percentage er- roor and mean absolute percent of three kinds of prediction model are very small, which the average relative error is within ＋2.5%, and there is no significant difference between prediction value and measured value.