RESUMO
This 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
Foi realizado um experimento com o objetivo de verificar a substituição do promotor de crescimento, olaquindox, por um probiótico, à base de Bacillus subtillis, em rações de frango de 1 a 43 dias de idade, sobre o desempenho, a digestibilidade de nutrientes e os valores de energia metabolizavel das rações. Foram utilizadas 930 aves da linhagem AG-Ross 508, alojadas em 15 boxes, seguindo a densidade de 11 aves/m2. O delineamento foi inteiramente casualizado, com 3 tratamentos e 5 repetições de 62 aves. Os tratamentos foram: A dieta com olaquindox e sem probiótico, B-dieta sem olaquindox e sem probiótico, C-dieta sem olaquindox e com probiótico. Foi possível observar que, à medida que as aves cresceram, os tratamentos com adição de olaquindox ou probiótico, melhoraram (p 0,05) na digestibilidade de nutrientes e no valor da energia metabolizável das rações. O probiótico pode substituir o promotor de crescimento
RESUMO
This 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
Foi realizado um experimento com o objetivo de verificar a substituição do promotor de crescimento, olaquindox, por um probiótico, à base de Bacillus subtillis, em rações de frango de 1 a 43 dias de idade, sobre o desempenho, a digestibilidade de nutrientes e os valores de energia metabolizavel das rações. Foram utilizadas 930 aves da linhagem AG-Ross 508, alojadas em 15 boxes, seguindo a densidade de 11 aves/m2. O delineamento foi inteiramente casualizado, com 3 tratamentos e 5 repetições de 62 aves. Os tratamentos foram: A dieta com olaquindox e sem probiótico, B-dieta sem olaquindox e sem probiótico, C-dieta sem olaquindox e com probiótico. Foi possível observar que, à medida que as aves cresceram, os tratamentos com adição de olaquindox ou probiótico, melhoraram (p 0,05) na digestibilidade de nutrientes e no valor da energia metabolizável das rações. O probiótico pode substituir o promotor de crescimento