2 research outputs found
Macroscopic Anatomy as a Strategy for Recognizing Commercial Wood from the Brazilian Amazon
No full textWood anatomical characterization is a key method for species identification and for combating illegal logging. This study aimed to provide a detailed macroscopic anatomical characterization of twelve wood species from the Brazilian Amazon, supporting species identification in forensic analysis and contributing to educational resources in wood anatomy. The samples were collected from a sawmill in Colniza, northern Mato Grosso, Brazil. Three woods were identified at the species level, and nine were identified at the genus level. Cedrela sp., Hymenaea sp., Hymenolobium sp., Handroanthus sp., and Peltogyne sp. presented well-demarcated growth rings. Diffuse porosity was common, except in Cedrela sp. In Manilkara sp., vessels occurred in radial chains, whereas Handroanthus sp. was notable for pore obstructions caused by a yellowish substance. The main parenchyma type was aliform and/or confluent, along with marginal bands. Six species displayed storied rays. Macroscopic analysis proved effective for wood identification, as parenchyma, vessel, and growth-ring features were sufficient to identify these commercial species at the genus level
YIELD IN SAWN WOOD AND RESIDUE UTILIZATION OF Qualea paraensis DUCKE AND Erisma uncinatum WARM
No full textThe study was developed in Nova Maringá - MT. The objectives of this work were to evaluate the sawn timber yield, the use of wood residues and the quantification of products for the species Qualea paraensis (cambará) and Erisma uncinatum (cedrinho) in three diametric classes: Class A - 40.0 to 49.9 cm; Class B - 50.0 to 59.9 cm; Class C - 60.0 to 69.9 cm. Four replicates per class were evaluated, totaling 12 logs per species of varied lengths. The sawn timber yield did not show a statistical difference between diametric classes for both species. Average yield for Qualea paraensis was equal to 43.97% and for Erisma uncinatum, 42.05%. The residues use increased the total yield in 4.40% and 6.52% for Qualea paraensis and Erisma uncinatum, respectively. For Erisma uncinatum, the sawed products with the highest production were the board in the primary unfolding and the short board in the residues use. As for Qualea paraensis, there was more production of rafters and short battens in the same processes
