Department of Animal Breeding and Nutrition, Faculty of Animal Breeding and Biology, Bydgoszcz University of Science and Technology, Bydgoszcz 85-084, Poland.
Department of Animal Breeding and Nutrition, Faculty of Animal Breeding and Biology, Bydgoszcz University of Science and Technology, Bydgoszcz 85-084, Poland.
Poult Sci. 2022 May;101(5):101817. doi: 10.1016/j.psj.2022.101817. Epub 2022 Feb 25.
The study's aim was to assess the production efficiency, evaluate the carcass and meat quality of chickens fed with wheat grains. 200 Ross 308 chickens were divided into 4 groups (5 replicates with 10 birds in each): control (C) and experimental groups, including W50, where the finisher feed was diluted with wheat grain in 50%, W25-25%, and W10-10%. The production efficiency and chemical composition of the feed were analyzed. After 42 d of rearing, 10 birds from each group were selected, and the tissue composition, pH, color, water-holding capacity, drip loss, the chemical composition of meat, and the apparent protein digestibility, bone, and jejunum strength were investigated. It was proved that ground feed had an unfavorable effect on the body weight (BW) in all groups. Wheat decreased the protein level (P < 0.001) and digestibility (P < 0.001). The body weight gain (BWG) in group W50 was lower than in groups C and W10 (P = 0.009), however, this had no effect on the final feed conversion ratio (FCR) (P = 0.146). Finisher feed costs were reduced in groups W50, W25 compared to group C (P < 0.001). The European Production Efficiency Factor and the European Broiler Index in groups W10 and W25 were similar to group C, whereas in W50 they were reduced (P = 0.035; 0.034). No negative effect on carcass traits was shown in groups W10 and W25, however, 50% feed replacement was unbeneficial compared to group C. Pectoral muscles from the experimental groups were characterized by higher lightness (P < 0.001). In group W10 femur bones' strength and in group W25 tibia bones' strength was higher than in group W50 (P = 0.014; 0.006). Jejunum tensile strength was higher in group W25 than in W10 (P = 0.002). The nutritional strategies based on the dilution of the feed with wheat grain could be applied at the level of 10/25%, but 50% had a negative effect.
这项研究旨在评估以麦粒喂养的鸡的生产效率，评估其胴体和肉质。将 200 只罗斯 308 鸡分为 4 组（每组 5 个重复，每个重复 10 只鸡）：对照组（C）和实验组，包括 W50 组，其中育肥饲料中用 50%的麦粒稀释；W25-25% 组和 W10-10% 组。分析了生产效率和饲料的化学成分。饲养 42 天后，从每组中选择 10 只鸡，研究组织成分、pH 值、颜色、持水力、滴水损失、肉的化学成分以及表观蛋白质消化率、骨骼和空肠强度。事实证明，地面饲料对所有组的体重（BW）都有不利影响。小麦降低了蛋白质水平（P < 0.001）和消化率（P < 0.001）。W50 组的体重增重（BWG）低于 C 组和 W10 组（P = 0.009），但对最终饲料转化率（FCR）没有影响（P = 0.146）。与 C 组相比，W50 组和 W25 组的育肥饲料成本降低（P < 0.001）。W10 组和 W25 组的欧洲生产效率因子和欧洲肉鸡指数与 C 组相似，而 W50 组则降低（P = 0.035；0.034）。在 W10 组和 W25 组中，没有对胴体特征产生负面影响，但与 C 组相比，50%的饲料替代是不利的。实验组的胸肌颜色更亮（P < 0.001）。W10 组的股骨强度和 W25 组的胫骨强度高于 W50 组（P = 0.014；0.006）。W25 组的空肠拉伸强度高于 W10 组（P = 0.002）。基于用麦粒稀释饲料的营养策略可以应用于 10/25%的水平，但 50%会产生负面影响。
