Efeito da idade e posição de amostragem na densidade e características anatômicas da madeira de Eucalyptus grandis
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Data
2012
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Resumo
The knowledge of the variations in the wood characteristics produced by eucalyptus trees according
to age and sampling positions is essential for its proper use. This study had as objective to evaluate the influence
of the age, longitudinal and radial positions on basic density and anatomical characteristics in Eucalyptus
grandis wood. The trees were planted in 3x2 m spacing and fertilized with commercial fertilizers in planting,
6 th and 12 th months. According to basal area distribution, fifteen trees were selected (24, 36 and 72 months
of age) – five trees per age. Disks at DBH position (1.3 m) were taken for fiber determination (length, wall
thickness, lumen diameter and width) and vessels (tangential diameter, frequency and area occupied) and
in other different sampling positions for basic density determination. Wood basic density increased from 0.43
to 0.46 g.cm -3 as well as the trees age increases with a longitudinal variation model, characterized through
a decrease in base-3m (0.42-0.49 0.40-0.46 g.cm -3 ) and an increase to the top of the trunk (0.46 0.54 g.cm -3 )
Fibers and vessels dimensions showed variations related to age and to pit-bark direction. Wood properties
behavior and variations indicate that, until this period, the juvenile wood is being formed.
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Características anatômicas, Densidade e madeira, Anatomical characteristics, Wood density and wood
Citação
SETTE JR., Carlos Roberto; OLIVEIRA, Ivanka Rosada de; TOMAZELLO FILHO, Mario; YAMAJI, Fábio Minoru; LACLAU, Jean Paul. Efeito da idade e posição de amostragem na densidade e características anatômicas da madeira de Eucalyptus grandis. Revista Árvore, Viçosa, v. 36, n. 6, p. 1183-1190, 2012.