外源性黑色素对乳牛表现和乳腺炎的影响
Yunmeng Li1, Zhiqiang Cheng1, Wenting Ma1
1Xinjiang Laboratory of Herbivore Nutrition for Meat and Milk, College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China.
Veterinary sciences
|September 27, 2024
概括
在奶牛中补充黑素可以通过增加蛋白质和脂肪含量来改善牛奶质量. 它还有助于减少体细胞数量,增强抗氧化剂和免疫反应,建议每天服用120毫克.
科学领域:
- 兽医科学 兽医科学 兽医科学
- 动物营养 动物营养
- 乳制品科学 乳制品科学
背景情况:
- 乳腺炎显著影响奶牛的健康,牛奶质量和行业利能力,原因是体细胞数量增加.
- 调查减轻乳腺炎和改善奶牛健康的新策略对于经济可持续性至关重要.
研究的目的:
- 评估外源性黑激素补充剂对荷尔斯坦乳牛的表现和乳腺炎指标的疗效.
- 确定最佳的黑激素剂量,以改善牛奶质量和免疫功能.
主要方法:
- 48只荷尔斯坦牛被随机分配到四组:对照组 (没有黑激素) 和三组治疗组,每天接受80毫克,120毫克或160毫克的黑激素30天.
- 在整个试验中收集了牛奶和血液样本,以分析体细胞计数,牛奶成分,血清生物化学指标以及抗氧化剂和免疫标记物.
主要成果:
- 与对照组相比,120毫克/天黑激素组 (T120) 在戒烟一周后显著减少体细胞计数.
- 补充黑素,特别是每天120毫克,增加了牛奶蛋白和脂肪百分比,总蛋白质和球蛋白含量.
- 在T120组中,抗氧化能力 (超氧化物脱酶活性) 和免疫反应 (介质素-10) 增强,而氧化应激标志物 (甲,瘤亡因子-α) 降低.
结论:
- 外源性黑激素补充剂可以有效地改善牛奶成分含量,并减少乳牛体细胞计数.
- 黑色素增强抗氧化能力和免疫反应,为管理乳腺炎提供了潜在的治疗策略.
- 在研究条件下,建议每天120毫克的黑激素给中期到晚期哺乳期的奶牛服用.
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