Abstract

This study evaluated the influence of dietary supplementation of onionskin waste (OW) and synthetic additives on growth, oxidative status, blood chemistry, caecal bacteria, carcase, immune indices and meat quality in broilers. One day old Ross 308 chicks (n = 280) were randomly allotted to basal diets containing either no additive, B-1; 0.5 g/kg oxytetracyline + 0.13 g/kg tert-butylhydroxyanisole, B-2; 10 g/kg OW, B-3; or 20 g/kg OW, B-4 for 42 days. Supplemented birds had higher (p < .05) body weight gain (BWG) and carcase weight compared to the B-1 birds. Diets had no effect (p > .05) on feed intake and feed efficiency, hematological indices, organ weight and serum immunoglobulin M. Onionskin supplementation repressed (p < .05) abdominal fat, serum total cholesterol, triglycerides, aspartate aminotransferase, muscle cholesterol and splenic interleukin-1β. The additives up-regulated (p < .05) splenic intelukin-10 and down-regulated tumour necrosis factor-α, and serum immunoglobulin A. Caecal Lactobacillus spp. was higher (p < .05) in B-1 and B-3 birds compared with the B-2 and B-4 birds. Supplemented birds had lower (p < .05) caecal Escherichia coli and Salmonella spp. counts than the B-1 birds. Antioxidant enzymes and total antioxidant capacity of breast muscle, liver and serum were higher (p < .05) in the supplemented birds compared with the B-1 birds. On day 1 post-mortem, breast meat malondialdehyde and carbonyl contents were lower (p < .05) in the supplemented birds compared with the B-1 birds. Dietary supplementation with 20 g/kg OW improved BWG and tissue antioxidant status, beneficially altered immune status, and caecal bacteria counts, and reduced abdominal fat, tissue cholesterol, and meat oxidative deterioration in broiler chickens.

• HIGHLIGHTS

• Onionskin supplementation improved body and carcase weights and lowered serum and meat cholesterol in broilers.

• Onionskin enhanced tissue antioxidant enzymes and reduced oxidative deterioration in broilers.

• Onionskin supplementation altered caecal bacteria and immune status in broilers.

摘要

这项研究评估了饮食中补充洋葱皮废物（OW）和合成添加剂对肉鸡生长，氧化状态，血液化学，盲肠细菌，屠体，免疫指数和肉品质的影响。将一天大的Ross 308小鸡（n  = 280）随机分配到不包含B-1添加剂的基础日粮中。0.5g / kg土霉素+ 0.13g / kg叔丁基羟基茴香醚，B-2; 10克/千克OW，B-3; 或20 g / kg OW，B-4，持续42天。 与B-1禽类相比，补充禽类的体重增加（BWG）和畜体重量更高（p <.05）。日粮 对采食量，采食效率，血液学指标，器官重量和血清免疫球蛋白M无影响（p > .05）。p  <.05）腹部脂肪，血清总胆固醇，甘油三酸酯，天冬氨酸转氨酶，肌肉胆固醇和脾脏白介素-1β。添加剂上调（p  <.05）脾脏intelukin-10和下调的肿瘤坏死因子-α，以及血清免疫球蛋白A.盲肠乳酸杆菌属。 与B-2和B-4鸟类相比，B-1和B-3鸟类的死亡率更高（p <.05）。补充的禽类的 盲肠大肠杆菌和沙门氏菌属的菌种较低（p <.05）。比B-1鸟还重要。乳房肌肉，肝脏和血清的抗氧化酶和总抗氧化能力较高（p 与B-1鸟类相比，补充鸟类的<0.05）。死后第1天， 与B-1禽相比，补充禽只的胸肉丙二醛和羰基含量较低（p <.05）。日粮中添加20 g / kg OW可以改善肉仔鸡的BWG和组织抗氧化状态，有益地改变免疫状态和盲肠细菌数量，并减少腹部脂肪，组织胆固醇和肉类氧化变质。

• 强调

• 补充洋葱皮可改善肉鸡的体重和and体重量，并降低血清和肉类胆固醇。

• 洋葱皮可增强组织中的抗氧化酶并减少肉鸡的氧化变质。

• 洋葱皮补充剂可改变肉鸡的盲肠细菌和免疫状态。