Jiangxi Province Key Laboratory of Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang, China.
College of Animal Science, South China Agricultural University, Guangzhou, China.
Anim Sci J. 2021 Jan-Dec;92(1):e13543. doi: 10.1111/asj.13543.
This study aims to evaluate the effect of puerarin on performance, meat quality, and serum indexes of beef cattle under hot environment. Thirty-two bulls were divided into four groups and fed diet supplemented with puerarin at 0, 200, 400, or 800 mg/kg. Results showed that heat stress was employed for 54 out of 60 days, 400 mg/kg group declined serum cortisol (COR) contents, all treatments increased the contents of total cholesterol, high density lipoprotein cholesterol, and total superoxide dismutase activity; in addition, glutathione peroxidase activity of 200 mg/kg group were enhanced, only 800 mg/kg group enhanced immunoglobulin (IgA, IgM, and IgG) and low density lipoprotein cholesterol contents compared with the control (p < .05). Moreover, 400-mg/kg puerarin increased serum growth hormone levels compared with 200 mg/kg group but declined COR concentrations compared with 200 mg/kg and 800 mg/kg groups (p < .05). More importantly, average daily gain and daily matter intake, and intramuscular fat contents of 400 mg/kg group were enhanced, but the shear force of beef in 400 mg/kg and 800 mg/kg groups were declined compared with the control (p < .05). These findings indicated that supplemental with puerarin enhanced immune and antioxidant, and 400 mg/kg of puerarin improved performance and meat quality by normalizing levels of stress hormones and increasing intramuscular fat deposition of beef cattle under hot environment.
本研究旨在评估葛根素对热环境下肉牛生产性能、肉质和血清指标的影响。将 32 头公牛分为 4 组，分别饲喂添加 0、200、400 和 800mg/kg 葛根素的日粮。结果表明，热应激持续 60 天中的 54 天，400mg/kg 组血清皮质醇（COR）含量下降，所有处理组总胆固醇、高密度脂蛋白胆固醇和总超氧化物歧化酶活性增加；此外，200mg/kg 组谷胱甘肽过氧化物酶活性增强，仅 800mg/kg 组与对照组相比，免疫球蛋白（IgA、IgM 和 IgG）和低密度脂蛋白胆固醇含量增加（p<.05）。此外，与 200mg/kg 组相比，400mg/kg 葛根素组血清生长激素水平升高，但与 200mg/kg 和 800mg/kg 组相比 COR 浓度降低（p<.05）。更重要的是，400mg/kg 组的平均日增重和日采食量以及肌肉内脂肪含量增加，但 400mg/kg 和 800mg/kg 组的牛肉剪切力与对照组相比下降（p<.05）。这些发现表明，补充葛根素可增强免疫和抗氧化能力，400mg/kg 的葛根素通过调节应激激素水平和增加热环境下肉牛的肌肉内脂肪沉积来提高生产性能和肉质。
