在养期间过度食铜会影响替代乳牛母牛的肝功能和生育能力
James H McCaughern1, Alexander M Mackenzie1, Emma C L Bleach1
1Animal Science Research Centre, Harper Adams University, Newport, UK.
The Veterinary record
|July 8, 2024
概括
乳牛中的高食铜 (Cu) 导致肝损伤和受孕率降低. 需要进一步的研究,以了解铜供应过剩在牛群中的长期影响.
科学领域:
- 兽医医学 兽医医学 兽医医学
- 动物营养 动物营养
- 生殖生物学 生殖生物学
背景情况:
- 饮食中的铜 (Cu) 供应过剩在英国乳牛群中普遍存在.
- 关于牛过度摄入铜的长期后果的研究有限.
研究的目的:
- 为了研究饮食中的铜供应过剩对荷尔斯坦-弗里西亚小牛的长期影响.
- 评估推的铜度与高度对肝脏健康和生殖能力的影响.
主要方法:
- 这是一项涉及80头荷尔斯坦-弗里西亚公牛的纵向研究.
- 两种饮食中的铜度被使用:推的 (16 mg/kg DM) 和高 (32 mg/kg DM).
- 雌牛在分娩前6周被监测到.
主要成果:
- 肝脏铜度升高和肝损伤在6.9个月大时在两组中都被观察到.
- 食高铜饮食的母牛表现出持续较高的肝铜水平.
- 高铜摄入量与第一次和第二次服务的受孕率降低有关.
结论:
- 过多的饮食铜摄入导致牛犊的肝损伤.
- 铜供应过剩会对生殖效率产生负面影响,特别是受孕率.
- 以前存在的肝损伤可能会影响研究结果,在回顾性分析中需要考虑.
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