This study evaluated the effects of Allium mongolicum Regel (AM) supplementation on nitrogen (N) balance, ruminal fermentation, and antioxidant properties. Sixteen male calves were assigned randomly to four groups, and the four were added with 0 (CON), 200 mg/kg (body weight; BW) (Low AM; LA), 400 mg/kg (BW) (Middle AM; MA), or 800 mg/kg (BW) (High AM; HA) per day for each individual. AM was added on dry matter (DM) basis. The experiment lasted for 58 days. Supplementation of AM could significantly increase average daily gain, DM digestibility, acid detergent fiber digestibility, and retained N/Intake N. N digestibility and molar proportion of propionate in the MA and HA treatments were higher than that in the CON treatment (p  < .05), respectively. AM supplementation significantly increased the molar concentration of total volatile fatty acid in the rumen fluid (p  < .05). The ratio of acetate to propionate in the MA and HA groups was lower than that in the CON treatment (p  < .05). Furthermore, AM supplementation significantly reduced methane (CH₄) (p  < .05) emissions. AM supplementation significantly increased the activities of superoxide dismutase. The MA group could significantly increase the activities of glutathione peroxidase and decrease the content of malondialdehyde. Our results indicated that AM supplementation could affect the nutrient digestibility, CH₄ emission, and antioxidant capacity of Simmental calves.

中文翻译：

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添加沙葱对西门塔尔犊牛消化率、甲烷产量和抗氧化能力的影响。

本研究评估了Allium mongolicum Regel (AM) 补充剂对氮 (N) 平衡、瘤胃发酵和抗氧化特性的影响。将 16 头雄性小牛随机分配到四组，四组分别添加 0（CON）、200 mg/kg（体重；BW）（低 AM；LA）、400 mg/kg（BW）（中 AM；MA )，或每个人每天 800 mg/kg (BW)（高 AM；HA）。AM 以干物质 (DM) 为基础添加。实验持续了 58 天。添加 AM 可显着提高平均日增重、DM 消化率、酸性洗涤剂纤维消化率和保留 N/摄入 N。MA 和 HA 处理中的 N 消化率和丙酸盐摩尔比例高于 CON 处理（p < .05)，分别。添加 AM 显着增加了瘤胃液中总挥发性脂肪酸的摩尔浓度 ( p  < .05)。MA 和 HA 组中乙酸与丙酸盐的比率低于 CON 治疗组 ( p  < .05)。此外，添加 AM 可显着减少甲烷 (CH ₄ ) ( p  < .05) 排放。AM 补充显着增加了超氧化物歧化酶的活性。MA组可显着提高谷胱甘肽过氧化物酶活性，降低丙二醛含量。我们的结果表明，添加 AM 会影响西门塔尔犊牛的营养消化率、CH ₄排放量和抗氧化能力。