Effect of a free-range raising system on growth performance, carcass yield, and meat quality of slow-growing chicken

文献类型： 外文期刊

第一作者： Wang, K. H.

作者： Wang, K. H.;Shi, S. R.;Dou, T. C.;Sun, H. J.

作者机构：

关键词： free range;slow-growing chicken;growth performance;carcass yield;meat quality

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

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收录情况： SCI

摘要： Experiments were conducted to evaluate the effect of free-range raising systems on growth performance, carcass yield, and meat quality of slow-growing chickens. Slow-growing female chickens, Gushi chickens, were selected as the experimental birds. Two hundred 1-d-old female chicks were raised in a pen for 35 d. On d 36, ninety healthy birds, with similar BW (353.7 +/- 32.1g), were selected and randomly assigned to 2 treatments (indoor treatment and free-range treatment, P > 0.05). Each treatment was represented by 3 groups containing 15 birds (45 birds per treatment). During the indoor treatment, the chickens were raised in floor pens in a conventional poultry research house (7 birds/m(2)). In the free-range treatment, the chickens were housed in a similar indoor house (7 birds/m(2)); in addition, they also had a free-range grass paddock (1 bird/m(2)). All birds were provided with the same starter and finisher diets and were raised for 112 d. Results showed that the BW and weight gain of the chickens in the free-range treatment were much lower than that of the chickens in the indoor floor treatments (P < 0.05). There was no effect of the free-range raising system on eviscerated carcass, breast, thigh, and wing yield (P > 0.05). However, the abdominal fat yield and tibia strength (P < 0.05) significantly declined. The nutrient composition (water, protein, and fat), water-holding capacity, shear force, and pH of the muscle were largely unaffected (P > 0.05) by the free-range raising system. The data indicated that the free-range raising system could significantly reduce growth performance, abdominal fat, and tibia strength, but with no effect on carcass traits and meat quality in slow-growing chickens.

分类号： S8

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