Document Detail


Effects of outdoor access on growth performance, carcass composition, and meat characteristics of broiler chickens.
MedLine Citation:
PMID:  23300311     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The present study was conducted to investigate the effects of outdoor access on the growth performance and meat quality of broiler chickens. Thirty-five-day-old female broilers were divided into 3 groups with 6 replicates of 124 birds each: (1) birds reared indoors (control group); (2) birds reared with outdoor access since 36 d of age (35-d group); and (3) birds reared with outdoor access since 71 d of age (70-d group). The results showed that outdoor access had no effect on growth performance, carcass yield, meat yield, muscle protein content, muscle fiber characteristics, or water-holding capacity (P > 0.05). Chickens from the outdoor access groups had a better appearance and degree of evenness. Birds in the outdoor access groups had a significantly lower lung percentage than birds in the control group (P < 0.05), whereas the kidney percentage of the 35-d group was significantly lower than that of the control group (P < 0.05). The meat of chickens in the 35-d group had higher L* values than that of the control group (P < 0.05). Compared with rearing indoors, outdoor access significantly increased the shear force of the breast muscle in both the 35 d and 70-d group (P < 0.05) and decreased the fat content of the thigh muscle in the case of 35-d group (P < 0.05). Birds in the 35-d group also had lower fat content in their thigh muscles than did the birds in the 70-d group (P < 0.05). The thigh muscles of the birds in the 35-d group showed lower levels of MUFA and higher levels of PUFA than those of the control group and 70-d group (P < 0.05). In conclusion, outdoor access had no effect on growth performance and yield traits but could improve the meat quality; birds reared with outdoor access from 36 d of age had better appearance and meat quality than those with outdoor access from 71 d of age.
Authors:
X Chen; W Jiang; H Z Tan; G F Xu; X B Zhang; S Wei; X Q Wang
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Poultry science     Volume:  92     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-01-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  435-43     Citation Subset:  IM    
Affiliation:
Department of Animal Science, South China Agricultural University/Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding/Key Laboratory of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture, Guangzhou, 510642, China; and.
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