Anatomia da madeira e potencial de produção de celulose e papel de quatro espécies jovens de Eucalyptus L’Hér

Abstract

In Brazil, the raw material used for pulp and paper production comes from the genus Eucalyptus L'Hér, high yields of hardwood pulp with excellent anatomical, chemical and physical properties of woods. In this sense, the objective of this paper is to evaluate through anatomy, the young wood of four Eucalyptus species, in order to obtain more information about its potential for pulp and paper production. Breast hight discs, from four 5-year-old Eucalyptus benthamii, E. dunnii, E. grandis and E. saligna were used for anatomical studies. The wood quality values for pulp and paper production (Runkel ratio, Wall proportion, Flexibility coefficient, Slenderness ratio, Luce’s factor) were defined based on mean values of sapwood fiber morphology. Although anatomically similar, pores in three or more units, in Eucalyptus saligna, and paratracheal aliform parenchyma, in E. dunnii, allows their differentiation. The quality indexes show that Eucalyptus benthamii, E. grandis and E. saligna produce nice woods for high mechanical resistance paper, while E. dunnii can be indicated for absorbent type papers.