| Revue: | Maderas : ciencia y tecnología |
| Base de datos: | |
| Número de sistema: | 000534598 |
| ISSN: | 0718-221X |
| Autores: | Melo, Luiz Eduardo de Lima1 Goulart, Selma Lopes2 Guimarães, Bárbara Maria Ribeiro3 Guimarães, Rosalvo Maciel4 Sartori, Caroline Junqueira5 Lima, José Tarcísio3 |
| Instituciones: | 1Universidade do Estado do Pará Departamento de Tecnologia e Recursos Naturais Laboratório de Ciência e Tecnologia da Madeira, Marabá Pará. Brasil 2Universidade Federal Rural da Amazônia, Paraupebas Pará. Brasil 3Universidade Federal de Lavras Departamento de Ciências Florestais, Lavras Minas Gerais. Brasil 4Universidade Federal do Piauí, Bom Jesus Piauí. Brasil 5Instituto Federal de Minas Gerais, São João Evangelista Minas Gerais. Brasil |
| Año: | 2018 |
| Volumen: | 20 |
| Número: | 4 |
| Paginación: | 553-562 |
| País: | Chile |
| Idioma: | Inglés |
| Resumen en inglés | Aim of the study was to estimate the influence of the fiber length and basic density on microfibril angle of Eucalyptus microcorys wood. The study area was in an experimental planting at the Universidade Federal de Lavras, Minas Gerais State, Brazil. Three 37 year-old Eucalyptus microcorys trees were used, from whose stems six centimeter-thick discs were removed, cut at a high of three meters. The disks were sanded and planed to highlight the growth rings. Specimens were taken every 1,5 cm across the radius from pith to bark for determining microfibril angle, fiber length and wood basic density. The microfibril angles were determined by use of polarized light microscopy, while the fiber morphology and basic density were determined by usual methods. The averages found for microfibril angle (12,6°), fiber length (968 µm) and basic density (480 kg.m-3) are, in general, within the range of values reported for these characteristics of wood. The microfibril angle showed accentuated reduction of the average values in the pith-bark direction. The fiber length and basic density showed the opposite behavior. We observed that the density and fiber length may be used as a microfibril angle predictor, accounting for 96% and 79% of its variation, respectively. |
| Keyword: | Eucalypt, Fiber morphology, Microfibril slope, Specific gravity, Wood variation. |
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