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Cruz, Gerson Kleber de Almeida Pio, Nabor da Silveira Iwakiri, Setsuo

Longitudinal and Transverse Variation in the Physical Properties of Wood Red Tauari

Publicação on-line; 29 ref.; 10 tables; 2 illus.; Summary (En)



ABSTRACT

The objective of this work was to study the fiber length variation, retractability and basic density,
in the core-bark direction and along the heig of the red tauari wood (Cariniana micrantha Ducke).
The stem was evaluated in the discs, from core to bark, corresponding to 0%, 25%, 50%, 75%
and 100%. At the commercial height of the tree the evaluation was carried out in the Base, DBH,
50%, 75% and 100%. Three trees were collected and 5 discs of 12 cm of thickness were taken from
each tree the heights: Base, DAP, 50%, 75% and 100%. Results indicated that the fiber length
increases in the radial direction core-bark and decreases in the longitudinal direction, from
base to top. The analysis of the basic density varied in the core-bark direction, with tendency to
increase from the position of 50% (heartwood), then decreasing in the sapwood region. Total
volumetric and linear contractions decreased in the core-bark direction.

Keywords: basic density, shrinkage, fiber.

Subjects--Topical Terms:
MADEIRA
DENSIDADE DA MADEIRA
FIBRA
ESTRUTURA VEGETAL
TAUARI