Determinação do teor de lignina em clones de Eucalyptus sp

Abstract

The Eucalyptus sp. has an excellent quality of wood to many finalities on the forest sector, among them, the making of charcoal. The percentual of lignin is intrinsically connected to the density of the wood, influencing positively the resulted charcoal, seen that it intensifies the calorific power. This study objectified to determine the percentual of lignin present in different longitudinal positions of 11 (eleven) genotypes implemented in the northeast of Bahia. 11 (eleven) genetics with a DBH (diameter at breast height) variating until four centimeters on the average settlement were collected from three medium trees. The samples were forwarded to the wood tech lab of the Universidade Federal do Recôncavo da Bahia where they were grounded in sieves to, after, be submitted to the modified Klason percentual of lignin determination method and the data were analyzed statically. The genetic material 4 (four) and 5 (five) presented, respectively, higher and lower lignin percentual, while the longitudinal position corresponding to the base of the shaft presented a higher concentration of lignin in consequence of its formation on the tree’s beginning life.