EFFECT OF THE SITE IN TECHNOLOGICAL CHARACTERISTICS OF EUCALYPTUS WOOD FOR KRAFT PULP PRODUCTION

The aim of this study was to analyze the technological characteristics for pulp production from three eucalyptus clones planted in two different sites derived from experiments considered clonal test from a Brazilian pulp industry. It was determined the wood basic density, the fibers morphologies and the chemical composition of clones(extractives content, lignin and carbohydrates). Kraft pulping was made, using alkali different loads in order to obtain pulps with kappa number 18± 1. The quality of site did not influence on fiber length, the surface area of vessels for all clones, in additional to the syringyl / guaiacyl for clone C. The quality of site influenced on the wood density, wall thickness, extractives content, lignin and syringyl / guaiacyl ratio (except for clone C) and carbohydrates. The cloneB showed the better performance on pulp production and an intermediate effect of site at technological characteristics, when comparing with Clones A and C. The Clone C showed the least effect of site on performance of pulp production and it was the only clone that showedno site effect in relation to syringyl/guaiacyl, indicating that this variable is an important parameter for pulp production regarding on performance and alkali loads.