Evaluation of taper functions for diameter estimated of commercial forest species in amazon matogrossense biome

Authors

  • Luciano Rodrigo Lanssanova Universidade Federal de Mato Grosso
  • Jaime Antônio Ubialli Universidade Federal de Mato Grosso
  • Julio Eduardo Arce Universidade Federal do Paraná
  • Allan Pelissari Universidade Federal do Paraná
  • Cyro Matheus Favalessa Universidade Federal de Mato Grosso
  • Ronaldo Drescher Universidade Federal de Mato Grosso

DOI:

https://doi.org/10.5380/rf.v43i2.26518

Keywords:

Floresta Amazônica, taper, valor ponderado de escores estatísticos.

Abstract

Abstract

The aim of this work was to adjust, evaluate and select taper functions for estimating diameters along the stem for commercially exploited species in the Amazon Rainforest in Mato Grosso State. The research was conducted in forest management units in areas of the Amazon Rainforest, located in Santa Carmen, Mato Grosso State. To adjust the taper functions,  449 trees were cubed, of the following species: Goupia glabra, Qualea albiflora, Trattinnickia burseraefolia, Erisma uncinatam and Mezilaurus Itauba. The non-segmented models of Schöepfer (1966), Kozak et al. (1969), Hradetzky (1976), and Demaerschalk (1972), adapted for Moura (1994), and segmented model of Max e Burkhart (1976) were fitted. In order to evaluate the accuracy of adjustments we used the determination coefficient, standard error of estimate in percentage and graphical analysis of the waste, weighted value of statistical scores, and auxiliary statistics: standard deviation, standard deviation of differences, sum of squared residuals and relative percent residue. The function of taper Demaerschalk (1972) was the most accurate to estimate the diameter along the stem for forest species of Amazon Matogrossense. Such function allows to describe the shape of the stem as well as the possibility of determining assortments for multiple products of wood.

 

Keywords: Amazon Rainforest; taper; weighted value of statistical scores.

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Published

2013-07-02

How to Cite

Lanssanova, L. R., Ubialli, J. A., Arce, J. E., Pelissari, A., Favalessa, C. M., & Drescher, R. (2013). Evaluation of taper functions for diameter estimated of commercial forest species in amazon matogrossense biome. Floresta, 43(2), 215–224. https://doi.org/10.5380/rf.v43i2.26518

Issue

Vol. 43 No. 2 (2013)

Section

Artigos

License

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