Estabelecimento inicial de espécies florestais em diferentes condições de sítio após mineração

Abstract

The success of plantations for reclaim degraded areas depends heavily on the initial establishment of the species, which, in turn, depends on some factors, among them the selection of the most suitable species for each type of site. Our objective was to investigate the establishment of forest species depends on the planting of degraded areas by mining site. After 15 months of plantation were analyzed physical and chemical characteristics of the soil, survival, growth seven species and leaf photosynthetic characteristics of six native species in three different sites (decapeado, gramínea and rejeito) were analyzed in two seasonal periods precipitation (wet and dry).. The gramínea site showed the highest concentrations of O.M., Mg and Na. The pH had less variation among sites and depths for periods of precipitation. The preparation of the planting holes significantly reduced soil penetration resistance, as well as increasing nutrient concentrations at different depths, sites and seasons, especially in the decapeado site. There was no interaction between species and planting sites for survival, TCR-a and TCR d. The species differed from each other, but this variation was independent of the site. Among the species, P. munguba and I. velutina stood out with the best performances for most of the analyzed variables. In general, there was no seasonal effect on the species for foliar photosynthetic characteristics. The decapeado site was highlighted as being where the best performances of all species were found for most of the studied variables. Thus, it is concluded that despite the site effect on the initial establishment, the differences between the species are similar between them, highlighting the importance of species selection step to guarantee the good performance of the recovery plantations.