Concentração de amônia ruminal sobre o consumo de ovinos e a digestibilidade de nutrientes do capim-buffel

Abstract

The objective of this study was to evaluate the effect of the concentration of nitrogen compounds in the diet on dry matter and nutrient intake and the apparent digestibility of nutrients in diets with buffelgrass hay (Cenchrus ciliaris, L.) for sheep. The experiment was conducted at the Small Ruminants Research Unit, in the Animal Science Sector, Federal University of Paraíba, Areia - PB. Five adult withouth racial pattern sheep were used, castrated and cannulated in the rumen, distributed in a 5x5 Latin square. Five buffel hay diets with N-NH3 supplementation levels were provided via ruminal infusion: T1 = 3.43 mg / dl N-NH3; T2 = 9.95 mg / dl of N-NH 3; T3 = 17.18 mg / dl N-NH 3; T4 = 23.02 mg / dl of N-NH3; T5 33.68 mg / dl in ruminal fluid. There was a quadratic effect for dry matter (DMI), organic matter (OMI), crude protein (CPI) and neutral detergent fiber (NDFI). The supply of increasing supplement levels didn't change the nutrient digestibility coefficient. The different concentrations of ammonia affected the dry matter consumption, with maximum consumption in the levels of 9.95 mg/dL of ammoniacal nitrogen. However, no effect was observed on the nutrient digestibility of buffelgrass hay.