INFLUENCE OF ANATOMY ON THE MECHANICAL RESISTANCE OF WOODS IN AN AGROFORESTRY SYSTEM

This study aimed to evaluate the influence of anatomy on mechanical resistance Parapiptadenia rigida (Benth.) Brenan, Peltophorum dubium (Spreng.) Taub., Eucalyptus grandis × urophylla, and Schizolobium parahyba (Vell.) Blake from an agroforestry system. For this purpose, twelve 9-year-old trees were felled. To anatomical properties, specimens taken diameter region at breast height (DBH 1.30 m ground). determine characteristics, central planks DBH tree logs removed produce test with dimensions 2.5 41.0 cm. The modulus elasticity, rupture, tension proportional limit, maximum force then evaluated. Conversely, 5 15 cm for used transversal longitudinal Janka hardness perpendicular compression tests. higher cell wall fraction, vessel frequency, ray frequency values, better properties. increase in fiber diameter, lumen height, width rays, values properties wood are lower.