ABSTRACT

This research aimed to determine the effect of dietary supplementation of pomegranate peels powder and waste soybean cooking oil on the performance and meat quality of male Ross 308 broiler chickens. Before start of the experiment, the metabolisable energy of pomegranate peels and other nutritive and chemical contents of pomegranate peels were measured. Also, peroxidation indices and fatty acids profiles of experimental oils were analysed. The experiment was designed as a 3 × 3 × 2 factorial arrangement of treatments including i) pomegranate peels (0, 4 and 8%), ii) waste soybean cooking oil (0, 2 and 4%) and iii) vitamin E (0 and 200 mg/kg diet). Supplementation of 8% pomegranate peels significantly decreased growth performance of broiler chickens (p < 0.05). The supplementation of 4% waste cooking oil significantly reduced body weight gain during the grower and whole experimental period (p < 0.05). Pomegranate peels supplementation decreased peroxide value (PV) and thiobarbituric acid (TBA) and increased pH of meat (p < 0.05). Supplementation of 4% waste cooking oil increased PV and TBA and reduced crude protein, water holding capacity (WHC), and pH of meat (p < 0.05). Vitamin E supplementation significantly decreased TBA and increased WHC of meat (p < 0.05). Supplementation of pomegranate peels decreased saturated fatty acids (SFA) and increased polyunsaturated fatty acids (PUFA) of meat (p < 0.05). Broilers fed diets with 4% waste cooking oil showed higher SFA and lower PUFA contents in meat (p < 0.05). So it can be concluded that 4% pomegranate peels could be used as an alternative feed ingredient and a source of antioxidants in broiler diets, and also 2% waste soybean cooking oil can be included as feed ingredient in broiler diets without adversely affecting performance.

摘要

本研究旨在确定日粮中添加石榴皮粉和废弃大豆食用油对罗斯 308 雄性肉鸡性能和肉质的影响。实验开始前，测量了石榴皮的代谢能和石榴皮的其他营养和化学成分。此外，还分析了实验油的过氧化指数和脂肪酸谱。实验设计为 3 × 3 × 2 因子排列的处理，包括 i) 石榴皮 (0、4 和 8%)，ii) 废大豆食用油 (0、2 和 4%) 和 iii) 维生素 E (0和 200 mg/kg 饮食）。添加8%石榴皮显着降低肉鸡的生长性能（p< 0.05)。补充 4% 废食用油显着降低了生长期间和整个实验期间的体重增加 ( p < 0.05)。补充石榴皮可降低过氧化值 (PV) 和硫代巴比妥酸 (TBA)，并增加肉的 pH 值 ( p < 0.05)。补充 4% 的废食用油会增加 PV 和 TBA，并降低粗蛋白、持水能力 (WHC) 和肉的 pH 值 ( p < 0.05)。补充维生素 E 显着降低 TBA 并增加肉类的 WHC（p < 0.05）。补充石榴皮可降低肉类的饱和脂肪酸 (SFA) 和增加多不饱和脂肪酸 (PUFA) ( p< 0.05)。肉鸡饲喂含 4% 废食用油的日粮时，肉中的 SFA 含量较高，而 PUFA 含量较低 ( p < 0.05)。因此可以得出结论，4% 的石榴皮可以用作肉鸡日粮中的替代饲料成分和抗氧化剂的来源，而且 2% 的废弃大豆食用油可以作为肉鸡日粮中的饲料成分而不会对生产性能产生不利影响。