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首页> 外文期刊>British Poultry Science >The effects of different feeding management systems on performance of a slow-growing broiler genotype
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The effects of different feeding management systems on performance of a slow-growing broiler genotype

机译：不同饲喂管理系统对慢速生长肉鸡基因型性能的影响

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1. A total of 420 male 1-d-old chicks of a slow-growing genetic line (Hubbard ISA Red JA) were used as the trial material. Two diets that were low in fats and high in cereals, and free from growth promoters and animal protein, and formulated at two energy and protein concentrations, were fed ad libitum or 80% of ad libitum. The birds had access to pasture from 14 d to slaughter at 84 d of age. 2. The treatment groups were: Dilute-AL (energy and protein diluted diet fed ad libitum), Dilute-R (restricted energy and protein diluted diet), High-AL (high energy and protein diet fed ad libitum), High-R (restricted high energy and protein diet). 3. Daily weight gains and feed consumptions were recorded in each replicate. 4. The live weight on d 84 was lowest in the Dilute-R group, whereas the highest live weight was in the High-AL group. The highest feed consumption was found in the Dilute-AL and High-AL groups. The worst feed conversion ratio was determined in the Dilute-AL and Dilute-R groups. The effect of treatments on mortality was not significant. 5. The best feed conversion efficiency was obtained in the feed-restricted group receiving the high energy and protein diet. The results suggest that forage may contribute to the nutrition of slow-growing free range broiler chickens if suitable pasture species are grown.
机译：1.总共使用了420只生长缓慢的遗传系雄性1 d小鸡（Hubbard ISA Red JA）作为试验材料。随意饲喂两种脂肪含量低，谷物含量高，不含生长促进剂和动物蛋白的饮食，并按两种能量和蛋白质浓度配制，随意饮食或随意饮食80％。鸟类从14天到84天大都可以宰杀。 2.治疗组为：稀释AL（随意补充能量和蛋白质的饮食），Dilute-R（限制能量和蛋白质的饮食），High-AL（随意补充高能量和蛋白质的饮食），High-R （限制高能量和高蛋白饮食）。 3.每次重复记录日增重和饲料消耗。 4. d 84的活重在Dilute-R组最低，而最高的活重在High-AL组。饲料消耗量最高的组为稀铝和高铝组。在Dilute-AL和Dilute-R组中确定了最差的饲料转化率。治疗对死亡率的影响不明显。 5.在高能量和高蛋白饮食的限饲组中获得最佳的饲料转化效率。结果表明，如果种植合适的牧草，饲草可能有助于缓慢生长的散养肉鸡的营养。

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