Different sources of forage with crude glycerin in diets with higher percentage of concentrate to beef cattle

This trial aimed to evaluate the effects of feeding different sources of forage in diets with crude glycerin included in 10% of DM diet, on intake, digestibility, ruminal fermentation and microbiology, performance, methane emission, carcass and meat quality traits of Nellore cattle finished in feedlot. The treatments consisting in different sources of forage: Corn silage (CS), Sugar cane (SC) and Sugar cane bagasse (SB), in diets with crude glycerin (10% DM) with higher concentrate proportion. For such study two experiments were conducted: Experiment 1: Nine ruminally cannulated Nellore steers (300.0 ± 30kg and 20 ± 2 months of age) were used in a 3 × 3 Latin Square experimental design with three treatments and three animals in three simultaneous triplicates. There was no effect of different sources of forage with crude glycerin on dry matter (DM), organic matter (OM) and crude protein (CP) intake. The intake of neutral detergent fiber (NDF) increased (P0.05) among diets. On the other hand, the population of Selenomonas ruminantium, was higher (P0.05). O consumo de fibra em detergente neutro (FDN) foi maior em animais alimentados com SM que não diferiu de animais alimentados com BC (P<0.05). Além disso, animais alimentados com BC apresentaram menor consumo de carboidratos não fibrosos (CNF; P<0.01). Animais alimentados com SM apresentaram maior digestibilidade da matéria seca MS e FDN comparada com as outras dietas. Animais alimentados com CA apresentaram maior digestibilidade de CNF (P