Probability density functions for description of diameter distribution in thinned stands of Tectona grandis

CERNE

Binoti, Mayra Luiza Marques da Silva¹  Fardin, Leonardo²  Binoti, Daniel Henrique Breda¹  Leite, Helio Garcia¹  Oliveira, Julianne de Castro¹ 

[1] Universidade Federal de Viçosa, Viçosa, Brasil$$;Floresteca, Várzea Grande, Brasil$$

关键词: Teak;    Weibull Distribution;    thinning.;   

DOI  :  10.1590/S0104-77602012000200002

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

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.

【 授权许可】

Unknown