Anatomia das fibras da madeira de clone de Eucalyptus urophylla plantado em diferentes espaçamentos no estado de Pernambuco.

Abstract

Eucalyptus represents the most important exotic forest genus in Brazil and has been widely used in forest plantations. Knowledge of the anatomical characteristics of wood such as vessel volume and fibers are factors in the physical and mechanical properties of wood as well as indicative of the final use of wood. The anatomical structure of wood exerts a direct influence on wood density, which also directly influences anisotropy. As a result, these are closely correlated properties. The spacing has a great influence on the quality of the forest site, as it is a sum of the factors that interfere in the productivity of the forest stand. The present study aimed to anatomically analyze the morphology of the fibers of an eight-year-old clone of Eucalyptus urophylla, collected at the Estação Experimental do Araripe, in Araripina - PE, planted in different spacings (2 x 1m (T1), 4 x 2m (T2) and 3 x 2m (T3)) to qualify for use in pulp and paper production. For, clone trees were used, five in each plantation, where a sample composed by treatment was carried out. The preparation of the samples consisted of the dissociation of wood fragments, carried out by means of a macerating solution. The operations were performed through the provisional slides, using an optical image acquisition system with the R 25 image acquisition system. ImageProPlus software was used to capture images and measure the fibers. The Runkel Index, the Felling Index were calculated and the Coefficient of Flexibility, Coefficient of Stiffness and the Wall Fraction of the treatments were determined. The determination of the basic density was obtained through the relation of the dry mass and its saturated volume. The fiber dimension values were compared to each other with significant mean differences between treatments, which demonstrate to be a selection of a spacing. ideal in order to achieve greater productivity. Results were obtained and approved for the presentation, as it presents characteristics with similar characteristics. Protective and paper protection fit adjustments protected when compared to spaces, treatment 2 being with protection and paper reinforcement.