ABSTRACT This experiment was conducted to evaluate the degradation kinetics and microbial efficiency of beef cattle grazing on low-quality forage and receiving supplements with different levels of rumen undegradable protein (RUP). The animals grazed on palisade grass pasture solely or this pasture and supplement containing 40 or 60 g of RUP per 100 g of crude protein (CP). The degradation profiles of neutral detergent fiber, fiber carbohydrates, and neutral detergent insoluble protein were interpreted kinetically by using a decreasing logistic […]

The effects of nitrogen levels of protein supplements were evaluated on the concentrations of ammonical nitrogen (N-NH3), volatile fatty acids (VFA’s) concentrations and pH in beef cattle grazing Brachiaria brizantha cv. Marandu. The microbial protein synthesis, ruminal undegradable protein (RUP) and endogenous crude protein (ECP) and their contributions to the pool of metabolizable protein (MP). Four Nelore steer, 395 ± 9 kg, fitted with ruminal cannulas, were used to evaluate ruminal parameters, degradability, ruminal kinetics and microbial synthesis in a […]