Magnolol rich in Magnolia officinalis is a bioactive polyphenolic compound. The aim of this study was to clarify the effects of magnolol additive (MA) on carcass and meat quality, biochemical characteristics and antioxidative capacity of Linwu ducks, by comparing it to that of antibiotic additive (colistin sulphate, CS). A total of 275 49-d-old ducks were randomly assigned to 5 groups with 5 cages of 11 ducks each and fed by the diets supplemented with 0, 100, 200 and 300 mg of MA/kg and 30 mg of CS/kg for 3 weeks, respectively. The results revealed that MA administration not only increased dressed percentage (calculated as a percentage of live weight), percentage of breast muscle, leg muscle and lean meat (calculated as a percentage of eviscerated weight), but also remarkably increased a*45 min and pH45 min of leg muscle. Moreover, MA administration decreased the percentage of abdominal fat (calculated as a percentage of eviscerated weight), 45-min cooking loss, water loss rate of leg muscle, 45-min cooking loss and drip loss of breast muscle at 24 hr and 48 hr. Furthermore, MA administration enhanced the activities of superoxide dismutase and catalase in serum or liver, serum total antioxidant capacity and hepatic reduced glutathione concentration significantly, compared with the basal diet or CS group (p < .05). On the other hand, triglyceride, total cholesterol, aspartate aminotransferase, malondialdehyde, protein carbonyl and 8-hydroxy-2'-deoxyguanosine contents in serum and liver were significantly increased in Linwu ducks fed with CS, compared with MA groups (p < .05). Taken together, these data demonstrated that magnolol could effectively improve the carcass and meat quality of Linwu ducks by regulating the in vivo antioxidant status and would be a potential candidate to replace antibiotic.

中文翻译：

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厚朴酚添加剂通过调节抗氧化状态改善临武鸭胴体和肉质。

厚朴中富含的厚朴酚是一种具有生物活性的多酚化合物。本研究的目的是通过与抗生素添加剂（硫酸粘杆菌素，CS）的比较，阐明厚朴酚添加剂（MA）对临武鸭胴体和肉品质、生化特性和抗氧化能力的影响。将 275 只 49 日龄的鸭子随机分为 5 组，每组 5 笼，每组 11 只鸭，饲喂添加 0、100、200 和 300 mg MA/kg 和 30 mg CS/kg 的日粮。分别为 3 周。结果表明，施用 MA 不仅增加了屠宰率（以活重的百分比计算）、胸肌、腿肌和瘦肉的百分比（以去内脏重量的百分比计算），而且显着增加了 a*45 min 和腿部肌肉的 pH45 分钟。而且，施用 MA 可降低腹部脂肪百分比（以去除内脏重量的百分比计算）、45 分钟蒸煮损失、腿部肌肉失水率、45 分钟蒸煮损失以及 24 小时和 48 小时胸肌滴水损失。此外，与基础饮食或 CS 组相比，MA 给药显着增强了血清或肝脏中超氧化物歧化酶和过氧化氢酶的活性、血清总抗氧化能力和肝脏还原型谷胱甘肽浓度 (p < .05)。另一方面，与 MA 组相比，饲喂 CS 的临武鸭血清和肝脏中的甘油三酯、总胆固醇、天冬氨酸转氨酶、丙二醛、蛋白质羰基和 8-羟基-2'-脱氧鸟苷含量显着增加 (p < .05 ). 综合起来，