Field study of the effect of B vitamin supplementation (transition VB) on health, production, and reproduction in early lactation in dairy herds

补充 B 族维生素（过渡 VB）对奶牛泌乳早期健康、生产和繁殖影响的现场研究

• 批准号: 479395-2015
• 负责人: LeBlanc, Stephen
• 金额: $ 6万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=580054
• 关键词: Field; study; effect; vitamin; supplementation

Up to one-half of dairy cows are affected by a subclinical metabolic disturbance in early lactation, of which the most common is hyperketonemia (ketosis). These conditions are associated with reduced animal performance and welfare. Over the last 10 years, Canadian researchers have demonstrated that provision of supplemental B vitamins to dairy cows in the weeks before and after calving has the potential to improve metabolic health and milk yield. A Canadian animal nutrition company, Jefo, had developed a novel dietary supplement containing the critical B vitamins. Very few nutritional supplements in the animal feed market have direct evidence of efficacy based on rigorous and suitably large-scale studies conducted in multiple commercial herds. Here, we propose a randomized controlled study in 1200 dairy cows in 6 herds over one year to assess the effectiveness of this product to reduce the incidence of ketosis, reduce fatty liver condition, decrease the proportion of cows that have not resumed a normal estrus cycle by the start of the breeding period, increase milk yield and improve reproductive performance in early lactation.

多达一半的奶牛在泌乳早期受到亚临床代谢紊乱的影响，其中最常见的是高酮血症（酮病）。 这些疾病与动物性能和福利降低有关。 在过去的10年里，加拿大研究人员已经证明，在产犊前后的几周内为奶牛提供补充B族维生素，有可能改善代谢健康和产奶量。加拿大一家动物营养公司Jefo开发了一种含有关键B族维生素的新型膳食补充剂。动物饲料市场上很少有营养补充剂具有基于在多个商业牛群中进行的严格和适当大规模研究的疗效直接证据。 在此，我们提出了一项在6个牛群的1200头奶牛中进行的为期一年的随机对照研究，以评估该产品在降低酮病发生率、减轻脂肪肝状况、降低在育种期开始时未恢复正常发情周期的奶牛比例、增加产奶量和改善泌乳早期生殖性能方面的有效性。