Estimating the Age of Oil-tea Camellia Trees

摘要

cqvip:To determine the age of oil-tea camellia trees,regression equations including Logistic,Mitscherlich,Gompertz,Korf,and Richards were used to calculate accumulative growth rate using basal trunk disc and investigate the relations between the age of oil-tea camellia trees and their growth rate of secondary trunk.The Gompertz equation Y = 71. 296 1 exp(-3. 874 4 exp(-0. 006 4 t)) was the most optimal equation to simulate the accumulative growth rate of basal trunk disc.This equation could be used to estimate the age of oil-tea camellia trees that grow under similar environmental conditions. The Korf equation Y = 576. 900 1 exp(-4. 153 0 x^(-0. 314 2)) was the best equation to describe the relation between the age and growth rate of different secondary trunks. With the adjustment coefficient and average growth of different secondary trunk discs,it is possible to predict the age of ancient oil-tea camellia trees that grow under similar environmental conditions. In addition,taking three or more discs from the same diameter group and calculating their average growth rate could lead to more accurate results. For trees that grow in different areas,environmental conditions should be carefully considered when using the above two equations to predict the age of ancient oil-tea camellia trees.