Prebióticos, probióticos e tomilho (Thymus vulgaris) para frangos de corte: desempenho, características da carcaça e variáveis sanguíneas
DOI:
https://doi.org/10.17533/udea.rccp.v30n1a01Palavras-chave:
aditivo alimentar, taxa de conversão, gananci peso, nutrição de avesResumo
Antecedentes: o stresse ambiental é um fator que predispõe a numerosas doenças em frangos de corte. Os probióticos, prebióticos e óleos essenciais podem ser uma alternativa viável ao uso de antibióticos na produção de frangos. Objetivo: avaliar o efeito do Fermacto (prebiótico), Bioplus 2B (probiótico) e óleo essencial de tomilho no desempenho zootécnico e nos parâmetros hematológicos em frangos “Ross”, durante 42 dias. Métodos: quinhentos e sessenta pintos foram aleatoriamente distribuídos por sete grupos (com 20 frangos em cada grupo), com quatro repetições. Foram usadas dietas contendo 1 ou 2 g/Kg de Fermacto, 1 ou 2 g/Kg de Bioplus 2B e 0.5 ou 1 g/Kg de e óleo essencial de tomilho. Um grupo controle também foi incluído (sem aditivos). Resultados: em comparação com o grupo controle o Fermacto, o Bioplus 2B e o óleo essencial de tomilho aumentaram o ganho de peso e o consumo da ração. O índice de conversão alimentar (FCR) foi influenciado pelo adição de 2 g/Kg de Fermacto. A suplementação da ração com 1 g/Kg de óleo essencial de tomilho aumentou o FCR e reduziu o peso relativo das coxas e das asas na carcaça. Não se observaram diferenças significativas entre grupos para os parâmetros da bioquímica sérica. Conclusão: as suplementações da dieta com Fermacto, Bioplus 2B e óleo essencial de tomilho melhoram o ganho de peso diário, mas seu efeito sobre as características da carcaça e os parâmetros bioquímicos do plasma sanguíneo foi limitado.
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