WOOD RESEARCH Volume 70, Number 1, 2025
JUAN DOMINGUEZ, INGRID CASSANA, and LEIF PORTAL

RELATIONSHIPS BETWEEN WOOD ANATOMY, PHYSICAL PROPERTIES AND COLORIMETRY IN TRICHILIA DAZAE T.D. PENN.: AN ENDEMIC SPECIES OF THE HUMID MONTANE FOREST OF PERU

Trichilia dazae, an endemic tree from the humid montane forests of the Peruvian Andes, plays an important ecological and potential economic role. Despite this, there is a significant gap in the characterization of its wood. This study aimed to analyze the anatomical, physical, and colorimetric properties of T. dazae wood to assess its technological potential and promote its sustainable use. Samples from three trees in the San Carlos district, Bongará, Peru, were collected. Anatomical description and physical properties were evaluated using international standards, while colorimetric analysis was conducted using the CIE Lab* system. The results showed distinct anatomical characteristics, such as diffuse porosity and heterocellular rays, associated with a basic density of 0.64 g/cm³. Significant correlations were found between basic density and anatomical features, suggesting a balance between mechanical strength and hydraulic conductivity. These findings emphasize the species’ value for both structural and decorative applications

WOOD RESEARCH Volume 69, Number 1, 2024
CLAUDETE CATANHEDE DO NASCIMENTO, CRISTIANO SOUZA NASCIMENTO, ROBERTO DANIEL DE ARAUJO, MARIA DA PAZ LIMA, and JORGE ALVES DE FREITAS

INFLUENCE OF SITES ON THE PHYSICAL AND MECHANICAL PROPERTIES OF NATIVE TROPICAL WOODS

The Amazon rainforest displays wide ecological diversity, reflected in its wood variation. The study evaluated the influence of different locations on the properties of wood from native tropical species extracted from the Brazilian Amazon. The most frequent species in the locations were selected, and a total of 104 trees were extracted. The logs were sawed breakdown to make beams (50 × 110 × 2,000 mm). The wood density and mechanical resistance of these samples were determined. The wood density ranged of 0.25-1.00 g/cm3, modulus of elasticity and rupture in static bending ranged of 5,982-19,025 MPa and 35-204 MPa, respectively. For compressive strength parallel to the grain, the range was 24-111 MPa; the strength of wood compressed parallel was 20-245 MPa, and the shear strength was 50-245 MPa. The study detected differences in the physical and mechanical properties of the woods regarding the origin of the sites (Amazonas-Pará/Brazil), with the modulus of elasticity and the wood density showing the greatest variations