NÍVEIS DE INCLUSÃO DE TITHONIA DIVERSIFOLIA SOBRE O COEFICIENTE DE DIGESTIBILIDADE E PARÂMETROS FERMENTATIVOS RUMINAIS IN VITRO

The objective of this work was to evaluate the effect of the inclusion level of Tithonia diversifolia on the in vitro ruminal digestibility of nutrient and the N-ammoniacal concentration. The experiment was carried out in DIC design with 3 treatments and 9 replicates according to the level of inclusion of tithonia in the diet, 0%, 5% and 10%. The chemical analysis of tithonia showed a crude protein content of 38.20%. It was observed a decrease effect in the dry matter (DM), Crude protein (CP) and FDA (neutral detergent fiber) digestibility coefficients in the 10% inclusion treatments (p <0.05). No differences were observed in the digestibility coefficients of all nutrients evaluated for the 0% and 5% treatments. The concentration of N-ammoniacal showed peak at 2 hours after inoculation in the treatment of 10% (p <0.05) indicating a greater microbial activity of ruminal degradability of crude protein.