Propriedades da madeira de eucalipto de primeira e segunda rotação, visando a sua utilização como madeira preservada

• Autor(a) principal: Valle, Mara Lúcia Agostini
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3014
• topic: Eucalipto; Rotação; Preservação; Eucalyptus; Rotation; Preservation; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::TECNOLOGIA E UTILIZACAO DE PRODUTOS FLORESTAIS

This study aimed to evaluate the wood properties of two natural hybrid of Eucalyptus urophylla S. T. Blake, involving two rotations and three positions along the longitudinal direction, addressing to their use as preserved wood. The study was conducted with material from the commercial plantations of Arcerlormittal Jequitinhonha Company, aged approximately 60 months. For the characterization of the wood, it were evaluated the ratio heart / sapwood, the specific basic density and the anatomical structure; and yet the penetration and retention of the preservative solution in the wood. It was used the chromate copper arsenate product (CCA type C), under the trademark of Osmosis K33 C, from the Montana Chemical Company S / A. Four trees were used by rotation and species, totaling sixteen trees, which were later on split into three logs. The logs were treated in autoclave, with four repetitions, using twelve logs for repetition. The preservative treatment was carried out through the process called cell filled, consisting of a 2% concentration of active ingredients, 90 minutes of pressure and initial vacuum and final of 30 and 15 minutes, respectively. The differences in wood properties among clones were more expressive as those observed between rotations or between positions along the longitudinal direction of the tree. The wood of the second rotation of both clones presented greater diameter, percentage of heartwood and heart / sapwood relation. The process and product used in preservative treating of the wood were effective within the conditions proposed by the work and the norm NBR 9480, presenting retention value higher than the minimum required by the norm. There are no restrictions on the use of wood from the first and second rotation for preservative treatment. There was no correlation between the CCA retention and the properties of the wood evaluated in this study.