热带树木和林分生长的bertalanffy - p模型

N. Brunner, M. Kühleitner
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引用次数: 0

摘要

Bertalanffy-Putter (BP)五参数增长模型为增长建模提供了一个通用的框架。利用文献中关于同一地区24种热带树木10年平均年龄大小的生长实验数据,我们确定了它们最适合的bp模型参数。虽然不同物种有不同的最佳拟合指数对,但有一个模型对21(87.5%)的数据具有良好的拟合(“良好拟合”意味着标准化均方根误差NRMSE低于2.5%)。该阈值是对数正态分布的95%分位数,该分位数与数据的最佳拟合模型的NRMSE值相拟合)。鉴于该模型的s型特征,尽管早期立木,我们讨论了生长实验的设置是否可能阻碍了生长。
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Bertalanffy-Pütter Models for the Growth of Tropical Trees and Stands
The Bertalanffy-Putter (BP) five-parameter growth model provides a versatile framework for the modeling of growth. Using data from a growth experiment in literature about the average size-at-age of 24 species of tropical trees over ten years in the same area, we identified their best-fit BP-model parameters. While different species had different best-fit exponent-pairs, there was a model with a good fit to 21 (87.5%) of the data (“Good fit” means a normalized root-mean-squared-error NRMSE below 2.5%. This threshold was the 95% quantile of the lognormal distribution that was fitted to the NRMSE values for the best-fit models for the data). In view of the sigmoidal character of this model despite the early stand we discuss whether the setting of the growth experiment may have impeded growth.
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