补充基于Bacillus的直接养微生物可以提高哺乳乳奶牛的料效率
Marta Terré1,2, Norbert Prat1,2, Daniel Sabrià1,2
1Department of Food Production, IRTA, Torre Marion, Caldes de Montbui, Spain.
Translational animal science
|August 12, 2024
概括
补充哺乳乳奶牛以Bacillus为基础的直接养微生物 (DFM) 改善了料和效率. 虽然DFM没有显著影响牛奶产量或成分,但在养部分混合 (PMR) 的奶牛中,它倾向于提高干物消化能力.
科学领域:
- 动物科学动物科学
- 类动物营养 类动物营养
- 微生物学 微生物学
背景情况:
- 含有Bacillus物种的直接养微生物 (DFM) 正在被探索,因为它们有可能调节肠道健康并改善牲畜的营养利用.
- 哺乳期奶牛需要优化的营养来维持乳生产和生殖效率,使料和营养利用成为关键的经济因素.
研究的目的:
- 评估基于Bacillus的直接养微生物 (DFM) 对哺乳乳奶牛的性能和营养消化能力的影响.
- 评估DFM补充对奶牛干物质摄入量 (DMI),奶产,牛奶成分和料效率的影响.
主要方法:
- 76只正在哺乳的荷尔斯坦-弗里西亚奶牛被分配给对照 (CON) 饮食或补充3克/头/天含有Bacillus licheniformis和Bacillus subtilis的DFM的饮食,持续16周.
- 奶牛被食部分混合食 (PMR),包括料,缩物和载体颗粒 (有或没有DFM).
- 测量包括每日DMI,牛奶产量,牛奶成分,能量校正牛奶 (ECM),料效率和明显的营养消化能力 (在第15周收集的便样本).
主要成果:
- 在最终体重,每日DMI,牛奶产量,ECM,ECM效率,牛奶成分或体细胞计数 (SCC) 之间没有发现显著差异.
- 与对照组相比,用DFM补充奶牛的料效率和 (N) 效率显著提高 (P ≤ 0.03).
- 干物质 (DM) 的消化能力往往在养DFM的奶牛中比CON组更高 (P = 0.10),在营养物质消化能力上没有其他显著差异.
结论:
- 补充含有Bacillus licheniformis和Bacillus subtilis的DFM改善了哺乳乳乳母牛的料和效率.
- DFM补充表明了改善干物质消化能力的趋势,这表明对营养利用有积极的影响.
- 虽然牛奶产量等整体绩效指标没有受到影响,但提高料效率表明,使用这种DFM的乳制品运营可能会带来经济效益.
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