Estimativa da densidade da madeira em árvores vivas de Cedrela fissilis Vell. através de resistografia

Abstract

Forest restoration aims at providing conditions for the restoration of the ecosystem, also the forest species. In this regard new methodologies are used to monitor the development and characteristics of individuals without cutting of trees. The resistographic analysis is a technique which aims to describe the profile of the radial variation of timber. The objective of this study was to evaluate the density of Cedrela fissilis Vell. wood (cedro rosa) through the resistographic technique and to correlate it with the basic density data generated by the gravimetric method, seeking thus to evaluate and prove the efficiency of non-destructive method and its potential to generate information on plant health, wood density of and possible uses of the species. The tests were performed on 24 trees of Cedrela fissilis Vell. in a restoration forest area, which were divided into three diameter classes. The gravimetric density analysis in the three diameter classes showed no statistically significant difference at 5%. The results of the assessment demonstrated difference between the diametrical classes and the resistographic amplitude (r=0,709). When correlated, tests showed a significant correlation (r=0,549), confirming the efficiency of this nondestructive method to determine the density of the wood of living trees of cedro rosa.