Determinação de rendimento no processamento de madeira de sete espécies em uma serraria de médio porte no município de Itacoatiara

Abstract

The present work was carried out in a medium-sized company in the branch of wood debris, located in the municipality of Itacoatiara-Am, this company works with the processing and commercialization of the wood of several tropical species. The present work had the objective of determining the yield in the processing of 7 (seven) forest species. To determine the yield, 35 logs with bark were counted, and the volume of the processed pieces, with their final dimensions (thickness, width and length), was determined after unfolding. The species evaluated in this study were Massaranduba (Manilkara huberi (Ducke)), Angelim Pedra (Hymenolobium petraeum Ducke), Angelim Vermelho (Dinizia excelsa Ducke), Tauari (Couratari guianensis), Cupiúba (Goupia glabra Aubl.), Ipê (Vahl) Nichols) and Piquiá (Caryocar microcarpum Ducke). The results obtained were 48% for the total yield, the processing yield per species being 31% for Massaranduba, 45% for Angelim Pedra, 53% for Ipê, 54% for Cupiúba, 55% for Tauari, 44% for Piquiá and 49% for Red Angelim. This low result for Massaranduba was attributed to the high number of hollows and cracks present in the studied logs, and the other species presented values within the range established for tropical species that varies from 45 to 55% sengundo Rocha (2002), the Tauarí presented value slightly below expected, this can be attributed to the surface hollows present in the logs. Even with the problems encountered in the processing, due to defects detected in the logs and the anatomical characteristics of the seven species, the yield in the processing of first grade lumber can be considered satisfactory (48%)