Índice de dispersão de agregados de um Latossolo Vermelho distroférrico cultivado com cana sob aplicação de vinhaça Dispersion index of aggregates in a Rhodic Ferrasol cultivated with cane under stillage application

The sugar and alcohol plants generate waste stillage one that needs proper destination. One alternative is the application of this residue to improve soil properties. The objective of this study was to evaluate the effect of stillage in the aggregation and productivity of sugar cane grown in three seasons of the soil sampling. The study was conducted in an Red dystrophic Latosol, sandy clay frank, at the BUNGE Monte Verde plant in the municipality of Ponta Pora, MS, Brasil. Cultivated with sugarcane third year. We used the (4x4) factorial design, evaluated 4 applications of stillage (0, 450, 600 and 750 m 3 ha -1 ) and their soil characteristics measured at four depths (0,0-0,5; 0,5-0,10; 0,10-0,20; 0,20-0,40 m) with five repetitions. To determine the rate of dispersion of aggregates (ID) sample were obtained undisturbed soil at 38, 75 and 111 days after application of stillage. With increasing doses of stillage were increased concentrations of potassium and organic matter and reduce the rate of dispersion and increased stability of soil aggregates.