Propriedades físicas do solo de áreas cultivadas com pastagem e eucalipto convertidas de área da floresta atlântica

Abstract

In the face of various areas of native forests converted in recent years in areas for the cultivation of agricultural species, seeking increased production, this work aimed to evaluate the physical properties of soil in areas cultivated with grassland and eucalyptus converted from forest Atlantic area. The experiment was subdivided plots with three replications, as the plots three different areas, native forest (original cover), pastures and eucalyptus, and the subplots three depths (0.00-0.20; 0.20-0.40 and 0.40-0.60 m). Undisturbed samples were used for the determination of soil density, macro and microporosity, geometric mean diameter (GMD) and ponderate (PMD). The grassland and eucalyptus showed higher soil density compared to native forest. The native forest and eucalyptus showed higher microporosity in the deeper layers, differing from the surface layer of the soil showed lower microporosity and macroporosity greater. Eucalyptus coverage showed higher GMD and PMD between the converted areas, already the largest GMD and PMD were found in native forest cover, differing from the others. The conversion of Atlantic forest area of farmland affected the physical properties of soil only in the depth of 0.00 to 0.20 m above the ground. The physical properties of eucalyptus area were the most neared the native forest.