Sekeroglu A, Demir E, Sarica M, Ulutas Z
Department of Animal Science, Faculty of Agriculture, University of Gaziosmanpasa, Tokat, Turkey.
Pak J Biol Sci. 2009 Apr 15;12(8):631-6. doi: 10.3923/pjbs.2009.631.636.
A research was conducted to determine the influence of the conventional and the free-range broiler housing systems using female broiler chicks had low hatching weight on growth performance, breast meat characteristics and some blood plasma parameters. In the conventional (totally confined) housing system sixty one-day-old female Ross broiler chicks were placed in indoor floor pens with three replicates of 20 chicks. In the free-range (partly-confined) housing system, sixty one-day-old Ross broiler chicks were placed in indoor floor pens and also accessed to a grass paddock during 44 day experimental period after 7 days old. Birds of both systems were fed the same commercial broiler diet. The free-range housing system significantly decreased the total feed intake and body weight of broilers (p<0.05). The redness (a* color) and yellowness (b* color) in breast meat were affected by the housing systems (p<0.05). The housing systems had no affect on fatty acids composition of breast meat (p>0.05). The plasma triglyceride and VLDL levels of the conventional reared birds were significantly higher than those reared the free-range (p<0.05). In conclusion, longer growth period was necessary to the free-range reared broilers.
进行了一项研究，以确定使用孵化体重低的雌性肉鸡雏鸡的传统和放养式肉鸡饲养系统对生长性能、胸肉特性和一些血浆参数的影响。在传统（完全封闭）饲养系统中，将60只1日龄的雌性罗斯肉鸡雏鸡放入室内地面围栏中，每组20只，共三个重复。在放养（部分封闭）饲养系统中，60只1日龄的罗斯肉鸡雏鸡被放入室内地面围栏中，并且在7日龄后的44天试验期内可以进入草地围场。两个系统的鸡都饲喂相同的商业肉鸡饲料。放养式饲养系统显著降低了肉鸡的总采食量和体重（p<0.05）。胸肉的红色度（a值）和黄色度（b值）受饲养系统影响（p<0.05）。饲养系统对胸肉的脂肪酸组成没有影响（p>0.05）。传统饲养的鸡的血浆甘油三酯和极低密度脂蛋白水平显著高于放养饲养的鸡（p<0.05）。总之，放养饲养的肉鸡需要更长的生长周期。
