广东省农业科学院机构知识库

Effects of outdoor access on growth performance, carcass composition, and meat characteristics of broiler chickens

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文献类型：外文期刊

作者： Chen, X. ¹ ; Jiang, W. ¹ ; Tan, H. Z. ² ; Xu, G. F. ¹ ; Zhang, X. B. ¹ ; Wei, S. ³ ; Wang, X. Q. ¹ ;

作者机构： 1.South China Agr Univ, Dept Anim Sci, Guangdong Prov Key Lab Agro Anim Genom & Mol Bree, Key Lab Chicken Genet Breeding & Reprod,Minist Ag, Guangzhou 510642, Guangdong, Peoples R China

2.WENs Grp, Prod Technol Dept, Yunfu 527300, Peoples R China

3.WENs Grp, Prod Technol Dept, Yunfu 5273

关键词： outdoor access;growth performance;meat characteristic;broiler

期刊名称：POULTRY SCIENCE （影响因子：3.352；五年影响因子：3.679 ）

ISSN： 0032-5791

年卷期： 2013 年 92 卷 2 期

页码：

收录情况： SCI

摘要： 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.

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