Effect of dietary fiber, genetic strain and age on the digestive metabolism of broiler chickens
Rev. bras. ciênc. avic
; 15(2): 83-90, 2013. tab
Article
em En
| VETINDEX
| ID: biblio-1400315
Biblioteca responsável:
BR68.1
ABSTRACT
In this study, 360 male broilers, out of which 240 of a fast-growing strain (Cobb500), and 120 of a slow-growing strain (Label Rouge), were used to evaluate the effect of dietary fiber on digesta transit time and digestive metabolism during the period of 1 to 42 days of age. A completely randomized experimental design with a 3x2 factorial arrangement was applied, consisting of three groups of birds (slow-growing - SG; fast-growing fed ad libitum - FGAL; and fast-growing pair-fed with SG broilers - FGPF) and two iso-protein diets (a 3100 kcal ME/kg low-fiber diet - LFD- and a 2800 kcal ME/kg high-fiber diet - HFD- with 14% wheat bran and 4% oat hulls). HFD-fed birds presented lower ME retention (p < 0.001) and lower dry matter metabolizability (DMM) (p < 0.001), which is possibly related to the shorter digesta transit time observed in these birds (p < 0.001). DMM was reduced with age, whereas metabolizable energy remained almost constant (p < 0.001) independently of strain. This may be related to the increase in feed intake as birds age. The slow-growing strain did not present better utilization of the high-fiber diet as compared to the fast-growing strain in none of the analyzed ages, even though showing a significant better use of fiber and dietary energy from 31 days of age.(AU)
Palavras-chave
Texto completo:
1
Base de dados:
VETINDEX
Assunto principal:
Fibras na Dieta
/
Linhagem Celular
/
Galinhas
/
Digestão
Limite:
Animals
Idioma:
En
Revista:
Rev. bras. ciênc. avic
Ano de publicação:
2013
Tipo de documento:
Article