Parâmetros Rusle para modelar a perda de um solo submetido à aplicação de dejeto suíno

The objective of this work was to determine adjustment parameters for the revised universal soil loss equation (Rusle) of a soil subjected to pig slurry application. Treatments consisted of 0, 50, 100, and 200 m 3 ha -1 pig slurry (PS), after the cultivation of black oat ( Avena strigosa ), besides the application of 50 m 3 ha -1 PS for six times onto the soil surface in a temporal sequence, and a control treatment of soil without cultivation and without pig slurry application. The evaluations were performed for black oat shoot dry mass, root mass and crop residues semi-incorporated into the soil (RMR), soil losses by means of simulated rain, and the parameters for water erosion modeling. The pig slurry application onto soil surface caused a reduction in the values of the soil consolidation parameter (C f ), an increase in the mass of living and dead roots and cultural residues incorporated in the upper layer (0.0–0.1 m) of the soil (B u ), and a reduction in the subfactor prior land use (PLU) of the Rusle.