Influência do espaçamento e da idade na produtividade e propriedades da madeira de Eucalyptus grandis x Eucalyptus camaldulensis para energia

• Autor(a) principal: Rocha, Maria Fernanda Vieira
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3130
• topic: Espaçamento; Eucalyptus; Energia; Qualidade da madeira; Qualidade do carvão; Spacing; Eucalyptus; Energy; Wood quality; Coal quality; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::TECNOLOGIA E UTILIZACAO DE PRODUTOS FLORESTAIS

The oscillations in the price of fossil fuels and the environmental problems that they cause have motivated the search for alternative energy sources, including biomass. However, the energetic properties of biomass varies according to species types. In the case of arboreal species, factors such as age, silvicultural treatments, handling, among others, will also affect these properties. Thus, this research seeks to evaluate the influence of plant spacing on the energetic properties of wood and charcoal from eucalyptus clones (hybrid of Eucalyptus grandis x Eucalyptus camaldulensis) in four different ages. The experiment took place in December 2002, in the company ArcelorMittal Jequitinhonha, with a completely randomized design with three replications. Every plot was constituted of six lines of planting, totaling 168 trees planted. The trees were collected at four different ages. A disk was removed from every tree and each disk samples were taken in order to study their density and other features of the wood, as well as the carbonization. Among the variables we can conclude that, for the production of charcoal and energy, the optimal cutting age is 61 months in the spacing 3,0 x 0,5 meters. Nevertheless, when measuring the wood with 85 months and considering the volume and properties of wood, bark and charcoal, the best spacing for the production of charcoal was 3,0 x 1,5 meters. Thus, the use of high density to grow crops for energy production is an excellent alternative to the sector, however, to make the decision to choose the ideal spacing, one should consider other factors, such as the costs involved in the forest production.