Variabilidade espacial de atributos físicos em latossolo coeso sob eucalipto em diferentes preparo de solo

Abstract

The objective of this study was to evaluate the spatial variability of the physical attributes in the Oxisol under eucalyptus in different soils. The experiment was carried out in the municipality of Cruz das Almas, Bahia. The tillage systems were: no-tillage, conventional and reduced planting. The soil samples were determined by macroporosity, microporosity, total porosity, soil density and gravimetric moisture. The spatial variability was used to evaluate soil resistance to penetration (RSP) in the interweaving of planting and in soil depth. The reduced planting system broke the cohesive layer of the soil, increased the porosity and decreased the density, resulting in better soil physical conditions for the development of forest species. The conventional tillage system obtained the highest total pore volume, higher macroporosity and lower RSP values in the superficial layer, however, the reverse was observed in the subsurface layer of the soil, due to traffic of the tractor wheel in the furrow. The spatial variability for the no-tillage system presented higher absolute values of RSP up to four years of eucalyptus development.