2017-11-212017-11-212005-09BRITO, Alexandre Barbosa de; LEANDRO, Nadja Susana Mogyca; STRINGHINI, José Henrique; BASTOS, Clovis Augusto Azeredo; CUNHA,; Weliton Pereira; CAFÉ, Marcos Barcellos. Desempenho e digestibilidade de nutrientes para frangos alimentados com rações contendo promotor de crescimento (Olaquindox) e probiótico (Bacillus subtilis). Acta Scientiarum. Animal Sciences, Maringá, v. 27, n. 3, p. 327-332, jul./set. 2005.1806-2636e- 1807-8672http://repositorio.bc.ufg.br/handle/ri/12913This experiment was conducted to evaluate the replacement of the olaquindox as growth promoter for a probiotic, based on Bacillus subtillis, in broiler rations from 1 to 43 days of age. The evaluation was in terms of performance, nutrient digestibility and metabolically energy values of rations. A total of 930 AG-Ross 508 chicks were distributed in 15 boxes, at the density of 11 birds/m2. The broilers were allotted in a completely randomized design with three treatments and five replications, each with 62 birds. The treatments were defined as: Treatment A (diet with olaquindox and without probiotic), Treatment B (diet without olaquindox and without probiotic), Treatment C (diet without olaquindox and with probiotic). No effect was observed (p>0.05) in nutrient digestibility and in metabolizable energy for rations containing these additives. The performance results of broilers treated with olaquindox did not differ (p>0.05) from those treated with probiotic. The probiotic can replace olaquindox in broiler rations without effect on broiler performance or digestibility.porAcesso AbertoBacillus subtillisDesempenhoFrangos de corteOlaquindoxBroilerPerformanceArtigo