Parâmetros nutricionais e padrões nictemeral do comportamento ingestivo de cordeiros Somalis Brasileira alimentados com diferentes níveis de energia metabolizável

Abstract

The study was conducted to determine the intake, nutrient digestibility and ingestive behavior of Brazilian Somali lambs fed different levels of metabolizable energy (ME). Forty non-castrated Brazilian Somali lambs with average weight of 13.47±1.76kg were used. The animals were assigned to a randomized block design with eight replications per block and five diets with increasing metabolizable energy (1.18, 2.07, 2.25, 2.42 and 2.69 Mcal/kg DM). The quadratic effect (P<0.05) of the ME level was determined for DM, CP, NDF and FC (g/day) and DM (g/kg0,75) and NDF(%PC and g/kg0,75) intake, as well as the digestibility coefficients (P<0.05) for CP, NDF and CF. A linear effect (P<0.05) was observed for digestibility of DM, OM and NFC with the increase of ME in the diet. Eating and idle results (hours/day) were influenced by the energy levels (P<0.05) and efficiencies of feeding and rumination (g NDF/h) showed a quadratic effect (P<0.05). It is concluded that the increase of ME levels in the diet influences intatke, nutrient digestibility and ingestive behavior of Brazilian Somali lambs.