中国北西部の子牛の消化率、メタン生成、抗酸化能力に及ぼすアリウム・モンゴリクム・リーゲルの効果

Effects of Allium mongolicum Regel supplementation on the digestibility, methane production, and antioxidant capacity of Simmental calves in northwest China.

• Kaili Xie
• Zhaofeng Wang
• Yongjia Wang
• Chunmei Wang
• Shenghua Chang
• Cheng Zhang
• Wanhe Zhu
• Fujiang Hou

抄録

本研究では、Allium mongolicum Regel(AM)の添加が窒素（N）バランス、鼻腔発酵、抗酸化特性に及ぼす影響を評価した。雄性子牛16頭を無作為に4群に割り付け、4群には個体ごとに1日0（CON）、200mg/kg（体重；BW）（Low AM；LA）、400mg/kg（BW）（Middle AM；MA）、または800mg/kg（BW）（High AM；HA）のいずれかを添加した。AMは乾物（DM）ベースで添加した。実験は 58 日間継続した。Nの消化率およびプロピオン酸のモル比は、MAおよびHAではそれぞれCONよりも高かった（p＜0.05）。AM添加は、ルーメン液中の総揮発性脂肪酸のモル濃度を有意に増加させた(p<.05)。また、MA群およびHA群のアセテートとプロピオン酸の比率は、CON処理群よりも低かった(p<.05)。さらに、AM添加はメタン(CH )排出量を有意に減少させた(p<.05)。また、AM添加はスーパーオキシドジスムターゼの活性を有意に増加させた。また、AM 添加群では、グルタチオンペルオキシダーゼの活性を有意に増加させ、マロンジアルデヒドの含有量を減少させることができた。これらの結果から、AM 添加は子牛の栄養消化率、CH 放出量、抗酸化能に影響を与える可能性が示唆された。

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 (CH ) (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, CH emission, and antioxidant capacity of Simmental calves.

© 2020 Japanese Society of Animal Science.