Potencial energético de espécies procedentes de plano de manejo florestal sustentado no norte de Moçambique

Abstract

The miombo woodland is a major provider of riches and services for the Mozambican population, because it is the largest forest biome in the country. However, there are still no detailed studies regarding the wood of this biome, causing difficulties in the definition of the use. Faced de deficiencies of studies, the objective is to evaluating the potential of the species from a forest management plan supported by the Miombo forest, aiming at its energ etic use. Five native species of Miombo, in the north of Mozambique were collected, Parinari curatellifolia, Brachystegia spciformis, Jubernardia globiflora, Brachystegia boehmii and Uapaca kirkiana, and five trees sampled per species. Discs of 2.5 cm, were obtained at the base (0%), 25%, 50%, 75% and 100% of the commercial height of the tree, defined to a minim diameter of 4 cm. Analyzes were carried out to determine basic density, structural and elemental chemical analysis, thermogravimetric analysis and wood calorific value. The material was charred, followed by immediate chemical analyzes, calorific value, apparent and energetic relative density, determined the transformation efficiency and carbonization yields. All species presented characteristics that determine the quality and potential for energy use. Among species, Uapaca kirkiana presented the quality for energy generation, while Parinari curatellifolia presented several properties that are unfavorable to this use.