Modelagem da densidade básica e caracterização química em clones de eucalyptus urophylla e eucalyptus grandis

Abstract

This study aimed of work was to evaluate the efficiency of the non destructive equipments for inference about the wood quality in clones of E. grandis and E. urophylla. It was evaluated wood of 49 clones of E. grandis and E. urophylla from a clonal test planted by ArcelorMittal Bioenergia, in Martinho Campos, Minas Gerais. After the evaluations with Pilodyn® and Resistograph® the trees were harvested and disc sample were extracted from 2, 10, 30, 50 and 70% of the commercial height of the tree. One extra disc sample was extracted at 1,30 m height. The discs were sent to UFLA for physical, chemical and energy analysis. The utilization of the non destructive equipments, Pilodyn® and Resistograph®, for inference about the wood quality showed low and mediun precision respectively. The correlations between basic density and the Resistograph (amplitude) in the first four centimeters of depth were higher compared with the average Resistograph (amplitude). The materials didn´t present variation in carbon, hydrogen and oxygen contests and in the calorific value. The material presenteds high values of basic density and lignin content, low values of ash content, which are favorable characteristics for the energetic use. The more relevant correlation observed were between volumetric calorific value and basic density (0,99), lignin and holocelulose content (-0,92) and carbon and oxygen content (-0,99). It was not evidence strong correlations between calorific value and elementary and lignin content of the clones wood evaluated.