摘要： B族维生素在能量代谢中扮演着重要角色,能有效改善能量负平衡和动物健康。试验目的是探讨高产奶牛围产期日粮补充维产康（过瘤胃保护复合B族维生素）对产前干物质采食量、酮病发生率、淘汰率和产奶量的影响。过瘤胃保护复合B族维生素主要含胆碱（Choline）、核黄素（B2）、叶酸（B9）、维生素B12。荷斯坦经产（3~5 胎次）试验组奶牛在围产期间（产前3 周至产后2 周）TMR日粮中补充过瘤胃保护复合B族维生素（100 g/牛·天）。 结果显示,过瘤胃保护复合B族维生素试验组奶牛在围产前期（产前21 天）干物质采食量较对照组提高18.28%[分别为（12.36±0.43）和（10.45±0.57）kg/牛·天,P<0.01]。酮病（亚临床和临床）发生率,过瘤胃保护复合B族维生素组（16.13%）较对照组（32.39%）奶牛降低50.20%。过瘤胃保护复合B族维生素组奶牛在产后至泌乳高峰（70 天）平均产奶量较对照组提高4.63 kg[提高11.97%,分别为（43.31±1.79）和（38.67±1.95）kg/牛·天,P<0.001],过瘤胃保护复合B族维生素组产奶量增加的趋势持续至产后210 天。过瘤胃保护复合B族维生素组较对照组产后70 和210 天的淘汰率分别降低23.67%（分别为6.45%和8.45%）和42.75%（分别为19.35%和33.80%）。试验结果显示,高产奶牛围产期日粮补充过瘤胃保护复合B族维生素对干物质采食量、酮病发生率、淘汰率和产奶量具有显著改善作用,这些改变可以有效提高奶牛场经济效益。
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CN 11-4768/S
主管：中华人民共和国农业农村部
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主管：中华人民共和国农业农村部
主办：中国农业科学院农业信息研究所
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