Potencial energético da madeira de clones de eucalipto em diferentes espaçamentos

Abstract

Aiming to evaluate the potential wood energy of three clones of eucalyptus in different planting spacings, was installed an experiment with a randomized block design in a factorial design, with a combination of six spacings (2,5 x 0,5 m; 2,5 x 1,0 m; 2,5 x 2,0 m; 3,0 x 0,5 m; 3,0 x 1,0 m e 3,0 x 2,0 m) three eucalyptus clones (GG 157, GG 680 e GG 100), with three replicates. At 32 months old, was selected and cut down a medium-diameter tree per plot. These trees were scaled by Smalian method, using sections from 2.0 m to DAP. On these sections were removed wooden disks with 5.0 cm thick, which were used for the analyzes of basic density and calorific value of wood and, based on these values, it was possible to estimate the amount of energy stored per m³. It was observed that the basic density of wood, the gross calorific power and the energy stored in eucalyptus wood were different with the clones and planting spacing. Basic density and the amount of energy stored in a cubic meter of eucalyptus wood tended to increase with in the planting spacing, mainly for GG 680 and GG100 clones. The superior gross calorific of the wood showed no direct relationship with the planting density.

Interaction between planting spacing and wood properties of Eucalyptus clones grown in short rotation

“…As observed in this study, the higher heating value of the wood did not show a direct relationship with the useful area of the trees of Eucalyptus urophylla × E. grandis (clones GG 100 and GG 680) and E. urophylla (clone GG 157) at 2 years and 8 months of age (Teixeira et al 2020). Each evaluated clone had an increase in this energy property within certain amplitudes of variation in spacing.…”

“…Some references indicate a small increase in density as a function of planting spacing in eucalyptus stands (Feuchard 2015, Rocha et al 2016, Moulin et al 2017, Teixeira et al 2020. However, considering the multiple uses of wood, the increase in density impacts the production and economy of the forest-based sector (Lasserre et al 2009, Pachas et al 2019.…”

Análise do uso de combustível sólido para uso doméstico

“…Podendo ser quantificado, apenas, com o auxílio do EDS (Figura 1). (Barros, 2014;Donato, 2015;Quirino, 1991;Pires, 2013;Teixeira et al, 2020;Wanderley, 2013). O mesmo se deu para os valores de densidade básica (T1) e aparente, onde apenas o T2 se mostrou levemente superior Quirino, 1991;Ribeiro, 1993).…”

Expansão e impactos socioambientais da cultura de Eucalyptus spp. (Myrtaceae) no Brasil: um panorama da literatura

“…pertence à família Myrtaceae e é nativo da Austrália (Lino et al, 2020), apresentando uma grande variedade de espécies e híbridos (Ramalho et al, 2020). O cultivo mundial de Eucalyptus tem crescido significativamente por apresentar muitas características comerciais desejáveis, uma vez que dele tudo se aproveita: a celulose para a produção de papel, madeira para a produção de energia, móveis, chapas, construções de casas e óleos essenciais usados de variadas formas na indústria farmacêutica, cosmética entre outras (Bertola, 2013;Kudlavicz, 2014;Moledo et al, 2016;Ferreira et al, 2017;Cabral et al, 2019;Correa et al, 2020a;Ramalho et al, 2020;Teago et al, 2020;Teixeira et al, 2020;IBÁ, 2021;Monteiro et al, 2021).…”

“…Com a expansão da produção do eucalipto, esse táxon passou a ser tema de debates entre ambientalistas e os que se dedicaram à sua produção. As opiniões se dividem consoante aos interesses e ao nível de conhecimento a respeito do tema (Lima, 1996;Scolforo, 2008;Moledo et al, 2016;Teixeira et al, 2020;Amorim et al, 2021;Rodrigues et al, 2021;Souza et al, 2021).…”