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Acta Amazonica

Print version ISSN 0044-5967

Abstract

COLPINI, Chirle; TRAVAGIN, Danielle Parra; SOARES, Thelma Shirlen  and  MORAES E SILVA, Versides Sebastião. Determination of bark percentage and volume of individual trees in an Open Ombrophylous Forest in northwest Mato Grosso. Acta Amaz. [online]. 2009, vol.39, n.1, pp. 97-104. ISSN 0044-5967.  http://dx.doi.org/10.1590/S0044-59672009000100010.

This study aimed to test and select models, with and without bark volume, and to determine the form factor and bark percentage of an open ombrophylous forest in northwest Mato Grosso. 91 trees were cubed by obtaining diameter, bark percentage, stem height and solid stem volume. A total of 10 models were tested. Statistical procedures, such as adjusted determination coefficient, residual error and distribution of residuals, were tested. The selected models were validated by the L&O test. The average form factor was 0.7424 and 0.7297, with and without bark, respectively. The average volume of bark was 0.4292 m3 (7.45% of total volume). The Schumacher-Hall model showed the best performance for volumes with and without bark.

Keywords : Regression; Form factor; Bark percentage.

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