兴安落叶松天然林林分直径分布和树高分布

Structure of Diameter and Height for Naturally Growing Larix gmelinii Forest

基于大兴安岭地区100块兴安落叶松天然林样地的调查数据,选用43个基础模型对兴安落叶松(Larix gmelinii)的直径分布和树高分布进行拟合,用10个基础模型对兴安落叶松的树高与直径关系进行回归模拟,求解模型参数值并用均方根误差(RMSE)、和相对误差(Bi)进行检验与评价。结果表明:Exp3P2模型的精度最高,可以很好的拟合兴安落叶松直径分布;柯列尔模型为最优兴安落叶松树高分布模型;树高与直径相关关系模型拟合与检验结果最优为Wykoffl模型。

With the statistics of 100 sample fields in Daxing＇ an Mountains of Inner Mongolia, we chose 43 basic models fitting the diameter and height of Larix gmelini, and used 10 regression simulation of height and diameter at its breast height （DBH） for the model parameter value to make detection as well as evaluation in terms of root mean square error （RMsE ） and relative bias. The model Exp3P2 was with the highest accuracy, which can simulated well for diameter distribution of planted L. gmelinii natural forest. Ronacp model was the best for tree height distribution of planted L. gmelinii natural forest. The Wykoffl model was the best in the relationship between the height and DBH compared with its inspection results.