Effect of dietary fiber and genetic strain on the performance and energy balance of broiler chickens

Revista Brasileira de Ciência Avícola

Rv Krás¹  Am Kessler¹  Aml Ribeiro¹  Jdi Henn¹  Ii Dos Santos¹  Dp Halfen¹  L Bockor¹ 

[1] ,Universidade Federal do Rio Grande do Sul Departamento de Zootecnia Porto Alegre RS

关键词: Cobb;    Label Rouge;    pair-fed;    wheat bran;   

DOI  :  10.1590/S1516-635X2013000100003

来源: SciELO

【 摘 要 】

The experiment was conducted to evaluate the effect of dietary fiber on the performance and energy balance of broiler chickens of a fast-growing strain (Cobb500) and a slow-growing strain (Label Rokens during the period of 1 one to 42 days of used In total, 360 male broilers (240 fast-grorain and 120 slow-grtrain)were, housed in collective cages. A completely randomized experimental dewith in 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 dis (a 3100 kcal ME/kg low-fiber diet and a 2800 kcal ME/kg high-fiber diet- Hwith containing 14% wheat bran and 4% oat hulls). Dietary fiber level did not affect feed intake (FI); however, it resulted in lower weight gain (WG) and worse feed conversion ratio (FCR) (p < 0.001) in birds fed the HFD diet due to its lower energy content. The FGPF group presented higher WG than SG and better FCR (p < 0.001), indicating that fast-growing birds present better performance than SG broilers, even under restricted feed intake. The SG group retained more energy relative to body weight (p < 0.001), which is associated to higher body fat retention in this strain (p < 0.001). The slow-growing strain did not present better use of high-fiber diet than fast-growing strain as expected.

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