Performance of broilers fed diets containing natural growth promoters

• Autor(a) principal: Pelicano, ERL [UNESP]
• Data de Publicação: 2004
• Outros Autores: Souza, PA [UNESP], Souza, HBA [UNESP], Oba, A [UNESP], Norkus, EA [UNESP], Kodawara, LM [UNESP], Lima, TMA [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S1516-635X2004000400007; http://hdl.handle.net/11449/4182
• topic: Broiler chickens; Performance; probiotics

The present study evaluated the effect of different probiotics on the performance of broiler chickens. A thousand and fifty one-day-old male Cobb chicks were distributed in a completely randomized design in a 3 x 2 + 1 factorial arrangement (3 probiotics sources in the diet, 2 probiotics concentrations in drinking water and 1 control group), with 5 repetitions of 30 birds per parcel. The results showed better feed conversion (p<0.01) (1-21, 22-35 and 1-45 days) and weight gain (p<0.05) (22-35 and 1-45 days) in the control group in relation to the groups receiving probiotics. The use of Bacillus subtilis in the diet improved (p<0.05) feed conversion during the growing phase, but this was not seen in the following period. Thus, it was concluded that probiotics supplementation had no beneficial effects on the performance.