Physical and chemical characterization of the substrate of three areas degraded in regeneration process in diamantina, mg.
One of the first steps to ensure successful recovery of degraded area is to understand how the physical and chemical properties of the substrate behave. Thus the present study aimed to perform the physical and chemical characterization of the three degraded areas substrate undergoing regeneration in Biribiri State Park, Diamantina, MG. Areas degraded by mining of diamonds, gold, subrosion and reference area counted 50 (10×10 m), 30 (10×10 m), 36 (5×3 m) and 25 (20×20 m) plots respectively. In each plot was collected a composite of the surface substrate (0-20 cm) sample being analyzed for chemical parameters: pH in water, levels of P, K+, Ca2+, Mg2+ and Al3+; sorption complex (potential acidity (H+Al)), base saturation (V %), sum of bases (SB), CEC at pH 7 (T), effective (t) and aluminum saturation (m%) and organic matter (MO) and the physical parameters: proportions of sand, silt and clay, soil resistance along the 0-30 cm, moisture, rock cover and exposed gravel layer. Analysis of physical and chemical properties of the substrate showed high limiting the development of invasive plant, presenting as substrates restrictions sandy texture with low fertility, high acidity, and medium resistance to penetration in areas degraded by mining of gold and diamond, a result which is consistent with the local geology, among which are basal formations of the Espinhaço Subgroup.