Estimating the age of old oil-tea camellia trees
2017
Chen, Y. | Chen, L. | Xu, Y. | Luo, J. | Wang, X. | Peng, S.
To determine the age of old oil-tea camellia trees, regression equations based on five growth theories NDASH Logistic, Mitscherlich, Gompertz, Korf, and Richard NDASH were used to calculate the total growth rate, using basal discs. The relationship between the age of old trees and the growth rate of different height branches was investigated. The Gompertz equation, Y=71.2961exp (-3.8744exp(-0.0064t)), was the optimal equation to simulate total growth rate of basal discs. This equation can be used to estimate the age of old oil-tea camellia trees that grow under similar environmental and climate conditions. The Korf equation, Y=576.9001exp(-4.1530x-0.3142), was the best equation to describe the relationship between the age and growth rate of different height branches. Knowing the adjustment coefficient and average growth of different height branch discs, it was possible to predict the age of ancient oil-tea camellia trees that grew under similar environmental conditions. Additionally, calculating the average value of three or more discs from the same diameter class could lead to better and more accurate results. For trees that grow in different areas, environmental and climate conditions should be carefully considered when using the above two equations to predict the age of ancient oil-tea camellia trees.
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