Swine farming generates great amount of manure that can be used as fertilizer in crops and pastures. The continuous application of swine waste may change the physical attributes of the soil. The present study aimed to verify the influence of 0, 48, 96, 144, 192 and 240 m³ ha-1 year-1 of pig slurry applications in a four-year time span on Oxisol in a perennial pasture. The mean content of dry matter in pig slurry was 1.72%. Soil samples of undisturbed and disturbed structures were collected in 0-0,05; 0,05-0,10; 0,10-0,15; 0,15-0,20; 0,20-0,25;0, 25-0,30 m layers. Organic matter content, texture, water dispersible clay, soil density, maximum bulk density, relative density, mechanical resistance to penetration, total porosity and macro, micro and criptopores volume, soil permeability to air, soil aggregates stability were evaluated. Organic matter content was the only attribute to show some interaction between dose and layer. The evaluated parameters were not influenced by application of different doses of pig slurry with dry matter of 1.72% for a period of four years in an Oxisol.
animals production; organic residue; edafic alterations
