Mixed volumetric models in clones of Eucalyptus in the gypsum pole of Araripe, Pernambuco

Authors

  • Joseilme Fernandes Gouveia Universidade Federal da Paraíba
  • José Antônio Aleixo da Silva Universidade Federal Rural de Pernambuco
  • Rinaldo Luiz Caraciolo Ferreira Universidade Federal Rural de Pernambuco
  • Fernando Herinque Lima Gadelha Universidade Federal Rural de Pernambuco
  • Luiz Medeiros de Araújo Lima Filho Universidade Federal da Paraíba

DOI:

https://doi.org/10.5380/rf.v45i3.36844

Keywords:

Forest inventory, volumetric estimation, comparing models.

Abstract

Abstract

The present research aimed to estimate the volume of Eucalyptus clones using mixed models. The database was derived from an experiment of Eucalyptus clones, located in the Chapada do Araripe, semiarid of the Pernambuco State. 89 trees were cubed by the method Smalian at the age of seven and a half years. The model of Schumacher and Hall was used as a control for comparison with the nonlinear mixed models. The adjustments of the mixed models were performed by adopting six distinct structures for the matrix of variances and covariances. The selection the best equation was done using the Akaike information criterion (AIC) Test Likelihood Ratio (TRMV), Mean Absolute Percentage Error (EPAM) and Vuong test. According to the criteria adopted, mixed models obtain better adjustments when compared with the classical model of Schumacher and Hall, resulting in a decrease in mean absolute percentage error of 4.6% to 3.2%. Based on these results, the nonlinear mixed models appear quite effective for modeling the volume of Eucalyptus and tend to contribute to the reduction of inventory costs with greater accuracy.

Author Biographies

Joseilme Fernandes Gouveia, Universidade Federal da Paraíba

Professor Adjunto I do Departamento de Ciências Exatas, Estatística.

 

José Antônio Aleixo da Silva, Universidade Federal Rural de Pernambuco

Professor Adjunto IV do Departamento de Ciências Florestais, Ciência Florestal

Rinaldo Luiz Caraciolo Ferreira, Universidade Federal Rural de Pernambuco

Professor Adjunto IV do Departamento de Ciências Florestais, Ciência Agrárias

Fernando Herinque Lima Gadelha, Universidade Federal Rural de Pernambuco

Pesquisador do Departamento de Ciências Florestais, Ciência Agrárias

Luiz Medeiros de Araújo Lima Filho, Universidade Federal da Paraíba

Professor Adjunto I do Departamento de Estatística, Estatística.

Published

2015-02-26

How to Cite

Gouveia, J. F., da Silva, J. A. A., Ferreira, R. L. C., Gadelha, F. H. L., & Lima Filho, L. M. de A. (2015). Mixed volumetric models in clones of Eucalyptus in the gypsum pole of Araripe, Pernambuco. Floresta, 45(3), 587–598. https://doi.org/10.5380/rf.v45i3.36844

Issue

Section

Artigos