Data/hora: 08/06/2024 16:41:39

Provedor de dados: | 42
País: | Brazil
Título: | Heartwood and sapwood in eucalyptus trees: non-conventional approach to wood quality
Autores: | CHERELLI,SABRINA G.; SARTORI,MARIA MÁRCIA P.; PRÓSPERO,ANDRÉ G.; BALLARIN,ADRIANO W.
Data: | 2018-03-01
Ano: | 2018
Palavras-chave: | Gamma radiation; Image analysis; Eucalyptus; Density uniformity index.
Resumo: | ABSTRACT This study evaluated the quality of heartwood and sapwood from mature trees of three species of Eucalyptus, by means of the qualification of their proportion, determination of basic and apparent density using non-destructive attenuation of gamma radiation technique and calculation of the density uniformity index. Six trees of each species (Eucalyptus grandis - 18 years old, Eucalyptus tereticornis - 35 years old and Corymbia citriodora - 28 years old) were used in the experimental program. The heartwood and sapwood were delimited by macroscopic analysis and the calculation of areas and percentage of heartwood and sapwood were performed using digital image. The uniformity index was calculated following methodology which numerically quantifies the dispersion of punctual density values of the wood around the mean density along the radius. The percentage of the heartwood was higher than the sapwood in all species studied. The density results showed no statistical difference between heartwood and sapwood. Differently from the density results, in all species studied there was statistical differences between uniformity indexes for heartwood and sapwood regions, making justifiable the inclusion of the density uniformity index as a quality parameter for Eucalyptus wood.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100425
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201820160195
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.90 n.1 2018
Fonte: | info:eu-repo/semantics/openAccess