夏季高温对分娩前同期母牛脂肪组织活动的影响
Romana Turk1, Nikola Rošić2, Blanka Beer Ljubić3
1Department of Pathophysiology, Faculty of Veterinary Medicine, University of Zagreb, 10000 Zagreb, Croatia.
Metabolites
|April 26, 2024
概括
乳牛的夏季热量压力减少了乳早期的脂肪动员. 热压力牛的脂肪分解率较低,这表明一种减少脂肪酸氧化产生的热量生产的策略.
科学领域:
- 动物科学动物科学
- 乳牛生理学 乳牛生理学
- 代谢障碍 代谢障碍 代谢障碍
背景情况:
- 炎热的气候对乳制品行业产生重大影响,影响了奶牛的健康和生产力.
- 热应激会破坏能量代谢,特别是在怀孕晚期和早期哺乳期,这是奶牛的关键时期.
研究的目的:
- 为了研究夏季热量应激对西门特牛在周周期间脂肪组织活动的影响.
- 为了比较热应激和热中性奶牛在分娩期间的代谢概况.
主要方法:
- 在分娩前后的多个时间点,从热应激 (n=12) 和热中性 (n=12) 的simmental奶牛收集了血液样本.
- 分析了血清中的葡萄糖度,β-基丁酸盐 (BHB),非化脂肪酸 (NEFA),瘦素 (LP) 和氨酸 (ADP).
主要成果:
- 热中性奶牛表现出较高的脂动化综合征,早期哺乳期间血清NEFA和BHB的增加证明了这一点.
- 与热中性对照对照相比,受热压力的奶牛显示出明显较低的勒丁和较高的阿迪波内克丁水平.
- 热应激的奶牛从脂肪组织中调动了更少的脂肪,这可能会减少代谢热量产生.
结论:
- 产周热应激会改变奶牛的脂肪组织活动.
- 减少热应激牛的脂肪动员可能是一种温度调节机制,以减少内源热量产生.
- 了解这些代谢适应对于在炎热的气候下管理乳牛群至关重要.
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