Modelling the Development of Above-Ground Biomass Energy Reserves of Four Economically Important Coniferous Woody Species

The goal of renewable energy is to replace production from fossil fuels. In that sense, forest biomass essential renewables. This article presents the results development reserves in fractions, increments and total above-ground coniferous stands (spruce, fir, pine, larch) during their economic cycle. experimental material comes 22 located mainly Central Slovakia, a lesser extent also Western Eastern Slovakia. Energy were calculated based on volume fractions taken mathematical models yield tables average values basic density calorific value determined. research showed as age increased, share wood fraction while it decreased bark fraction, especially branch fraction. curves constructed relation stand site index have very similar shape current annual increment stands. grew faster at 40 80 years than 140 years. Spruce had highest mean increment, followed by larch pine. As increases, slightly decrease efficiency solar significantly decreases. It peaks practically reaching maximum increment.