Linha de base das ações de restauração ecológica: quantificação de carbono em pastagens degradadas

Abstract

Knowing the degraded pastures is extremely important so that you can plan restoration projects. The study aimed to quantify the average carbon stock in the baseline of an action of ecological restoration to be implemented. The study was conducted at Fazenda Umbuzeiro, private property, located in the Serra da Jiboia, city of Elísio Medrado, Bahia. This property has a reforestation with native trees of about 0,7ha that was implanted sixteen years ago by the Environmental Group of Bahia (GAMBÁ) and at the external perimeter of reforestation there is a pasture that is target of this work. Two sites were established 20x20m and within each area were launched ten plots 1x1m. The grasses were cut at ground level and then taken to the Laboratory of Ecology Plant and Ecological Restoration (LEVRE) for the determination of moist matter, dry matter and biomass. Later it was made the analysis of carbon content shown, where the value of biomass found to sample area of 20m2 was multiplied by the correction factor C (0.44). The total fresh matter found was 15,18 Mg / ha, the total biomass was 7,99 Mg / ha and the total carbon was 3,52 MgC / ha. Depending on the conditions under which the degraded pastures are, they will store more or less carbon and the amount of carbon stored by them is lower compared to the stored by forest and capoeira training.