Avaliação anatômica, físico-química e energética da madeira das espécies Piptadenia stipulacea (Benth.) Ducke e Amburana cearensis (Allemao) A. C. Smith de ocorrência no Semiárido Nordestino Brasileiro

Abstract

The 'Caatinga' is an exclusively Brazilian biome, which has a large variety of fauna and flora species, and a good part of these endemic. Over the years the abolition of the 'caatinga' by human action has reduced this biome, it is believed that currently there is less than half of the original vegetation. This actually happens, mainly by the use of the energy potential of their species without proper concern about the sustainability of the biome. A better knowledge of the energy potential of plant species from the 'caatinga' enables a more appropriate management, reducing negative impacts in areas properly explored. The aim of this study was to evaluate the potential energy, chemical and anatomical characteristics of wood species Amburana cearensis (Allemao) A. C. Smith and Piptadenia stipulacea (Benth.) Ducke, so that these have been known and therefore better used. The Amburana cearensis exhibited average values for fiber length, fiber width and lumen diameter of the fiber significantly higher than the species Piptadenia stipulacea and equivalent amounts of thickness of fiber, with average levels of wood ash and extractives significantly higher. Averages, significantly higher than 1% probability of lignin content and holocellulose content were observed for the specie Piptadenia stipulacea. The gravimetric yield was similar for both species, while the yield of condensed liquid was significantly higher for Amburana cearensis. In relation to coal quality, higher values were observed for gross calorific value and fixed carbon for Piptadenia stipulacea while Amburana cearensis exhibited higher levels of volatiles and ash. Keywords: Cumaru.