摘要
本文通过曲线拟合得出樟子松胸径、树高与材积生长量曲线方程。通过求导得出樟子松胸径、树高连年生长量峰值分别出现在12年和16年,其最大值分别为0.71056cm/a和0.3697m/a;求得的单株材积生长曲线三个时间点为18.1、26.4和36.5,0~18年为材积渐增期,18~36年为材积速生期,36年以后为材积的缓增期,材积连年生长量的峰值出现在树龄26年时。
In this paper,the curve equations of DBH,tree height and volume growth of Pinus sylvestris var.mongolica are obtained by curve fitting.According to the derivation,the peak diameters of the DBS and the height of the tree height in the years were 12 years and 16 years,respectively,and the maximum values were 0.71056cm/a and 0.3697m/a respectively.The three individual volume growth curves were obtained.The time points are 18.1,26.4 and 36.5,0~18 years is the increasing period of volume,18~36 years is the fast-growing period of the volume,36 years later is the slow-increasing period of the volume,and the peak of the annual growth of the volume appears at the age of 26 years.
作者
许家春
XU Jiachun(The First Forest and Grassland Survey Planning and Design Academy of Heilongjiang Province,Mudanjiang 157009)
出处
《林业勘查设计》
2019年第3期93-95,共3页
Forest Investigation Design
关键词
樟子松
生长规律
模型拟合
Pinus sylvestris var.mongolica
growth regularity
model fitting
