Suitable model for estimating the stem age of Populus alba L. using its diameter

The article analyzes the suitable model for estimating the stem age of Populus alba using its diameter. The results show that the Richards model was the most suitable for estimating the age of P. alba stems. The nonlinear regression curve between tree rings and stem diameter fitted with the Richards model was suitable for estimating the stem age of P. alba, avoiding the need to cut down trees and protecting forests. The fitted nonlinear regression curves of tree rings and stem diameter with the Clare and Sloboda models were close to the measured data and could be also used to estimate tree age.

本文探讨了利用白杨树（Populus alba）的直径来估算其树干年龄的适宜模型。研究表明，Richards模型在估算P. alba树干年龄方面最为适宜。基于Richards模型拟合的树轮与树干直径之间的非线性回归曲线，适用于估算白杨树的树干年龄，从而避免了砍伐树木的必要性，并有助于保护森林资源。使用Clare和Sloboda模型拟合的树轮与树干直径的非线性回归曲线与实测数据相近，亦可用于估算树木年龄。