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Revista Árvore

Print version ISSN 0100-6762On-line version ISSN 1806-9088

Abstract

BINOTI, Daniel Henrique Breda; BINOTI, Mayra Luiza Marques da Silva  and  LEITE, Helio Garcia. USE OF LOG-LOGISTIC FUNCTION FOR MODELING DIAMETER DISTRIBUTION. Rev. Árvore [online]. 2015, vol.39, n.5, pp.943-951. ISSN 0100-6762.  http://dx.doi.org/10.1590/0100-67622015000500017.

The objective of this study was to evaluate the efficiency of the log-logistic function with 2 and 3 parameters, γ = dapmin right truncated to describe the diameter structure of even-aged stands and set a diametric distribution model using the functions. The modeling performed by the log-logistic function was compared to the modeling performed with the Weibull function. For this, we used data from permanent plots of Eucalyptus clones, measured on six occasions. The grip of the functions to the data was confirmed by applying the Kolmogorov-Smirnov (K-S) test. The average values of the K-S test statistic was 0.0901, 0.0997, 0.1297, and 0.0616 for the function with 2P, 3P, α = dapmin right truncated, respectively. For the Weibull function an average of 0. 0638 was obtained for the K-S test statistic. The log-logistic function of two parameters can be used to simulate the diametric structure of eucalyptus plantations.

Keywords : Weibull; Truncation; Structure diameter.

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