Data/hora: 05/06/2024 04:37:17

Provedor de dados: | 65
País: | Brazil
Título: | β-mannanase and mannan oligosaccharides in broiler chicken feed
Autores: | Barros,Victor Ramos Sales Mendes de; Lana,Geraldo Roberto Quintão; Lana,Sandra Roselí Valerio; Lana,Ângela Maria Quintão; Cunha,Fabio Sales Albuquerque; Neto,João Virgínio Emerenciano.
Data: | 2015-01-01
Ano: | 2015
Palavras-chave: | Broiler chickens; Economic efficiency; Exogenous enzymes.
Resumo: | The study aimed to evaluate the use of β-mannanase and mannan oligosaccharides (MOS) to replace growth promoters in broiler diets. Four hundred male Cobb broiler chicks were used, with initial weight of 45±1g, distributed in a completely randomized design with five treatments and eight repetitions of ten birds. The treatments were: basal feed; basal feed without growth promoter; basal feed without growth promoter + β-mannanase; basal feed without growth promoter + MOS; and basal feed without growth promoter + β-mannanase + MOS. The feed intake of the birds increased in response to dietary treatments compared to basal diet during the period 1-21 days of age. A higher weight gain and improved feed conversion was found at 42 days of age among birds that had received the basal diet without growth promoter + MOS. The absolute weight at slaughter, relative carcass and prime cuts except breast weights improved in response to dietary treatments compared to the basal diet at 42 days of age. No difference was observed in relative weight of the liver, while significant differences were found in the weight of heart, gizzard, and abdominal fat. It was concluded that β-mannanase and MOS can replace the growth promoters in broiler diets without compromising production and economic performance. However, the association of these products into the feed may cause negative interaction that reduces the broiler chickens' performance
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000100111
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20131544
Formato: | text/html
Fonte: | Ciência Rural  v.45 n.1 2015
Fonte: | info:eu-repo/semantics/openAccess