期刊论文详细信息
Revista Brasileira de Ciência Avícola
Comparison of free range broiler chicken strains raised in confined or semi-confined systems
Al Santos2  Nk Sakomura1  Er Freitas1  Cms Fortes1  Envm Carrilho1 
[1] ,UNESP/FCAVJaboticabal SP
关键词: Growth curve;    ISA Label;    meat quality;    Paraíso Pedrês;    raising system;   
DOI  :  10.1590/S1516-635X2005000200004
来源: SciELO
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【 摘 要 】

The present study was carried out to compare the growth curve, performance and carcass yield of two broiler strains, Paraíso Pedrês (PP) and ISA Label (ISA), raised in confined or semi-confined systems. It was used a completely randomized design with five replicates, consisting of 20 and 29 birds in semi-confined and confined systems, respectively. Semi-confined birds had free access to pasture at 28 days of age. Performance data were recorded weekly by building growth curves as well as calculating the growth rate. After reaching the recommended body weight (2.5 kg), male birds were slaughtered for physicochemical analysis of carcass, parts and organs. Semi-confined PP and ISA birds showed higher growth potential, higher weight gain, lower feed intake and better feed-to-gain ratio than confined birds. No interactions were observed for carcass yield and meat quality characteristics. Males presented higher yields of feet, drumstick, thigh, drumstick + thigh, and heart, while females presented higher breast and abdominal fat yield. Breast meat from ISA Label birds was more yellowish than from PP, whereas less soft meat was observed in semi-confined birds.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License

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