ATRIBUTOS FÍSICOS EM LATOSSOLO SOB DIFERENTES CONDIÇÕES DE USO NO BREJO PARAIBANO

Abstract

A substitution of the forests for the introduction of agricultural systems causes an imbalance without ecosystem, due to the withdrawal of the original vegetation cover and implantation of cultures, together with inadequate practices of management, promoting the rupture of the balance between the soil and the environment, thus modifying its properties chemical, physical and biological, limiting its agricultural use. Thus, the objective of this work is to evaluate the physical attributes in the Oxisol under different conditions of use (cultivated area, pasture and native vegetation) and not Brejo Paraibano (PB). The unperturbed soil samples were collected in depths of 0.0-0.10 and 0.10-0.20 m. The physical characterization was performed at the Soil Physics Laboratory (LFS) of the Department of Soil and Rural Engineering (DSER) at the Center of Agricultural Sciences (CCA) of the Federal University of Paraíba (UFPB), determining the soil texture, soil and soil density . particles, total porosity, macroporosity and microporosity, aggregate stability and water availability. It was verified that as the soil texture fractions did not present the high variation in depth or condition of use, fact that all conditions classified as Sandy Clay, except a native vegetation condition in the surface layer. Among the conditions of use, higher values of soil density were observed under grazing conditions, regardless of the depth, results of execution adopted under these conditions, since the trampling of the animals in the pasture area implies soil compaction and consequently in increasing soil density.