用度量误差模型方法建立油松树高曲线方程组1）

摘要

According to forest continuous inventory data of Chinese pine , based on Richards equations , we used modeling meth-ods with measurement error to construct compatible system of equations for height -diameter curve of the stands .All models were significant at 0.05 level, and the accuracies were95 .73%and96 .44%for estimating average height and average DBH, respectively.With the development of Pinus tabulaeformis stand age, rapid growing period of average DBH comes af-ter that of average height with that of average DBH at 30-40 years and that of average height at 20-30 years.The growth of average tree height was fast , while the DBH was about 5-10 cm, then decreased gradually .Tree height -diameter curve , average diameter-age curve and average height-age curve could keep compatible and consistent .%根据一类清查数据，以Richards方程为基础，采用度量误差模型方法，建立油松林分相容性树高曲线方程组。结果表明：模型在0．05的水平上检验显著，对树高、胸径的预估精度分别为96．12％、96．53％；胸径生长的速生期滞后于树高生长的速生期，树高生长极盛期的林龄为20～30 a，胸径生长极盛期的林龄为30～40 a；胸径为5～10 cm时，树高生长最快，此后逐渐变缓；树高曲线与林分胸径、树高生长过程曲线之间具有相容性和一致性。