大青山人工油松单木生长模型的研究

Study on Pinus tabulaeformis Carr.Artificial Forest Individual Tree Growth Model in Daqing Mountains of Inner Mongolia

文章利用内蒙古大青山油松人工林的调查数据来研究内蒙古大青山油松人工林单木生长模型。结果表明：①不同立地条件下油松人工林的树高、胸径和材积及其相应的生长量和峰值时的连年生长量以下坡最大，上坡最小，中坡介于二者之间。②用Logistic模型y=k／（1＋e^a-n）拟合不同立地条件下油松人工林的树高、胸径和材积的生长过程，不同立地条件下的参数值不同，模型的拟合精度较高，砰均在0．90以上。③用Logistic模型的三阶导数d^3y／dt^3=kr^3ea-n（e^2len-2n-4e^a-n＋1）（1＋e^n-r）^-4划分不同立地条件下油松人工林树高、胸径和材积的各个生长阶段，结果表明油松人工林以下坡前慢期最短，进入后慢期的时间最晚，速生期持续时间最长；上坡前慢期最长，进入后慢期的时间最早，速生期持续时间最短；中坡介于二者之间。总的来看，内蒙古大青山油松人工林生长速生期的时间树高为7—19龄、胸径为8—24龄、材积为14～30龄。

This paper study on single tree growth models of the Pinus tabulaeformis Carr artificial forest in Inner Mongolia Daqing mountain with the survey data in Pinus tabulaeformis Carr plantation. The resuits are as follows：（1）Aecording to the the corresponding growth condition of pinus tabulaeformis Carr tree height, DBH stemflow volume and and peak in successive years of growth, the biggest is the downhill slope, the smallest is the uphill slope, in between the minimum up between them. （2）Fitting different site condi- tions in Pinus tabulaeformis Car plantations of the tree height, diameter at breast height and volume of the growth process with the Logistic model y = k / （ 1 ＋ ea - rt） , different site conditions in different parameter values, model fitting precision were more than 0.90. （3） Basted on the Logistic model with three derivatives d^3y/dt^3=kr^3ea-n（e^2len-2n-4e^a-n＋1）（1＋e^n-r）^-4, Different site conditions under the tree height, DBH of Pinus tabulaeformis Car plantation and volume of each stage, the results showed that the effects to downhill before entering the shortest, slow periods of time after the late period of slower, fast - growing longest period, Before going into the longest period of slower and slower period of time after the shortest duration, fast - growing periods, In between the slope between them. In general, Inner Mongolia daqing mountain plantations growing period of quick - grow pinus tabulaeformis trees for 7 - 19high time for 19 age, DBH 8 -24 ages, volume for 14 - 30 ages.