Sobrevivência de espécies nativas em função da calagem em área degradada na bacia do rio Pandeiros

Abstract

The aim of this study was to evaluate the survival rate of native cerrado species as a function of liming. The experiment was carried out in a Pandeiros river watershed. The experimental area presented soil with low pH, low base saturation and strong signs of anthropic degradation. In the area of ​​lending up terraces built to contain erosion, we planted pioneer and non - pioneer native forest species, testing the absence and presence of dolomitic limestone in the planting pits. Planting was carried out in two subareas within the microbasin. For subarea 1 the pioneer species tested were Angico Vermelho (Anadenanthera macrocarpa), Aroeira (Lithraea molleoides) and Pau Ferro (Caesalpinia ferrea); the species tested were: Gonçalo Alves (Astronium fraxinifolium), Carne de vaca (Clethra scabra) and Farinha seca (Albizia hasslerii). The initial and non-pioneer secondary species planted among the pioneer species were, respectively, the Yellow Ipê (Tabebuia ocharea) and the Jatobá (Hymenaea courbaril), these species being used for the subareas. After 449 days the survival rate of the pioneer and non-pioneer species for subareas 1 and 2 was evaluated. In general, there was no effect of liming on plant survival. For subarea 1, the species with the highest survival rate was Pau Ferro. For subarea 2, the species with the highest survival rate was Gonçalo Alves. Subarea 1 presented a higher survival rate of non-pioneer species than subarea 2.