Data/hora: 03/06/2024 10:09:57

Provedor de dados: | Revista Scientia Agraria Paranaensis
País: | Brazil

Título:

Weibull function adjustment procedures for prognosing diameter distribution of eucalyptus plantations

Weibull function adjustment procedures for prognosing diameter distribution of eucalyptus plantations

Autores: | Castro, Renato Vinícius Oliveira; Bruzinga, Josiane Silva; Mota, Fabrícia Conceição Menez; Azevedo, Glauce Tais Oliveira Souza; Azevedo, Gileno Brito de; Leite, Helio Garcia; Silva, Antonilmar Araujo Lopes da.
Data: | 2017-12-20
Ano: | 2017
Palavras-chave: | Função de densidade de probabilidade; Métodos de ajuste; Modelagem da produção florestal.
Resumo: | This study evaluated the prognosis of the diameter distribution of forest stands of Eucalyptus spp., Using the Weibull probability density function, with two and three parameters and two systems of equations for forest prognosis (Systems I and II), the System I made by a larger number of stand variables. We used data of 791 permanent plots measured at ages 25-122 months. The two-parameter function was fitted by maximum likelihood methods and linear approach and the three parameters only by the maximum likelihood method. The quality of the settings of the Weibull function was assessed using the Kolmogorov-Smirnov test (α = 0.01). To adjust the equation systems have randomly selected 551 plots and to validate the data, the 240 remaining installments. The quality of the adjustments of system equations was evaluated from the distribution of residuals charts, correlation coefficient (r), square root of the mean error (RQEM), average percentage differences (MDP) and bias. The f.d.p. Weibull three parameters set by the maximum likelihood method making use of System II is the most suitable procedure for the prognosis of clonal stands of Eucalyptus urophylla and Eucalyptus grandis unthinned.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Português
Identificador: | http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/15035
Editor: | Scientia Agraria Paranaensis

Relação:

http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/15035/12156

http://e-revista.unioeste.br/index.php/scientiaagraria/article/downloadSuppFile/15035/2339

http://e-revista.unioeste.br/index.php/scientiaagraria/article/downloadSuppFile/15035/2340

http://e-revista.unioeste.br/index.php/scientiaagraria/article/downloadSuppFile/15035/2341

Formato: | application/pdf

Fonte:

Scientia Agraria Paranaensis; Vol. 16, No 4 (2017); 528-534

1983-1471

Fonte: | http://creativecommons.org/licenses/by-nc-sa/4.0