Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/6969
Título: Variabilidade anatómica e da densidade da madeira de Quercus faginea em diferentes idades e condições ambientais
Outros títulos: Wood anatomy and density variability of Quercus faginea at different ages and environmental conditions
Autor: Sousa, Vicelina Milena Piteira Rebelo Barnabé
Orientador: Pereira, Helena Margarida Nunes
Palavras-chave: Quercus faginea
wood variability
heartwood
anatomy
density
Data de Defesa: 2013
Editora: ISA
Citação: Sousa, V.M.P.R.B. - Variabilidade anatómica e da densidade da madeira de Quercus faginea em diferentes idades e condições ambientais. Lisboa: ISA, 2013, 191 p.
Resumo: The importance and valorization of the species that occur naturally in Portugal motivated the present study to evaluate the properties, variability and the technological potential of the wood of Quercus faginea Lam., commonly referred as Portuguese or Lusitanian oak. Growth rings, heartwood development, anatomical characteristics of wood and bark and wood density were studied at different ages and sites. The wood showed growth ring porosity, high fibre and rays proportion and high wood density. The heartwood proportion was relatively high and increased from the base to the top following the trunk profile. Sapwood thickness was approximately constant. The fibre and multiseriate rays showed an increasing tendency towards the bark as well as the mean earlywood vessels area. The ring width and wood density decreased from pith to bark. The variation sources included age, trees and environmental conditions. Site was responsible for the main variations followed by tree and cambial age. The correlations between the studied variables showed that growth and wood quality might be estimated namely with ring width. The wood characterization and relative stem homogeneity allow exploitation of this species and reinforce its role in forest diversity.
Descrição: Doutoramento em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/6969
Aparece nas colecções:BISA - Teses de Doutoramento / Doctoral Thesis

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