PROBABILITY DENSITY FUNCTIONS FOR DESCRIPTION OF DIAMETER ISTRIBUTION IN THINNED STANDS OF Tectona grandis

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Daniel Henrique Breda Binoti Mayra Luiza Marques da Silva Binoti Helio Garcia Leite Leonardo Fardin Julianne de Castro Oliveira

Abstract

The objective of this study was to evaluate the effectiveness of fatigue life, Frechet, Gamma, Generalized Gamma, Generalized Logistic, Log-logistic, Nakagami, Beta, Burr, Dagum, Weibull and Hyperbolic distributions in describing diameter distribution in teak stands subjected to thinning at different ages. Data used in this study originated from 238 rectangular permanent plots 490 m2 in size, installed in stands of Tectona grandis L. f. in Mato Grosso state, Brazil. The plots were measured at ages 34, 43, 55, 68, 81, 82, 92, 104, 105, 120, 134 and 145 months on average. Thinning was done in two occasions: the first was systematic at age 81months, with a basal area intensity of 36%, while the second was selective at age 104 months on average and removed poorer trees, reducing basal area by 30%. Fittings were assessed by the Kolmogorov-Smirnov goodness-of-fit test. The Log-logistic (3P), Burr (3P), Hyperbolic (3P), Burr (4P), Weibull (3P), Hyperbolic (2P), Fatigue Life (3P) and Nakagami functions provided more satisfactory values for the k-s test than the more commonly used Weibull function.

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How to Cite
BINOTI, Daniel Henrique Breda et al. PROBABILITY DENSITY FUNCTIONS FOR DESCRIPTION OF DIAMETER ISTRIBUTION IN THINNED STANDS OF Tectona grandis. CERNE, [S.l.], v. 18, n. 2, p. 185-196, apr. 2016. ISSN 2317-6342. Available at: <http://cerne.ufla.br/site/index.php/CERNE/article/view/814>. Date accessed: 16 sep. 2019.
Keywords
Teak, Weibull Distribution, thinning.
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Article