The objective of this research was to evaluate the performance, carcass yield and intestinal morphometry of broiler chickens raised under different temperatures that received feed with or without yeast extract and prebiotic in the pre-initial phase. One thousand four hundred and forty one-day old male chicks were used, raised in different climate chambers. Feed with or without the addition of yeast extract and prebiotic was offered only in the pre-initial phase (1 to 7 days). From the eighth day on, […]

The performance of broilers reared at different temperatures and fed diet with or without yeast extract and/or prebiotic in the starter phase was evaluated. One thousand, four hundred and forty 1-d male Cobb-500® were reared at different climatic chambers. The diets with or without yeast extract or prebiotic were fed only in the starter phase (1 to 7 days), and from the 8th day on all broiler were fed the same commercial diet. It was used a complete randomized experimental […]

An experiment was conducted with 2,112 Ross male broiler chicks, with the objective to evaluate the use of non-nutrient additives (antibiotic, prebiotic and symbiotic) on performance and carcass characteristics of broilers. The birds were distributed in a complete randomized design in 2 × 6 (corn × additive) factorial arrangement, with 12 rations, eight replicates and 22 birds per experimental unit. Diets were based on corn and soybean meal, using in the half the rations standard quality corn (Rations 1 to […]