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单独或与单素一起养的Bacillus licheniformis发酵提取物对乳牛的生产性能和料效率的影响
S L Rigert1, P Hartoonian1, S E Omale1
1Department of Animal Science, Iowa State University, Ames, IA 50011.
Journal of dairy science
|February 22, 2026
概括
细菌菌发酵提取物 (BLFE) 改善了奶牛的牛奶蛋白和料效率,而宁素提高了牛奶脂肪. 结合它们显示出对抗性,表明需要进一步研究.
科学领域:
- 动物营养和新陈代谢
- 动物生理学 动物生理学
- 乳制品科学 乳制品科学
背景情况:
- 优化哺乳乳奶牛的生产性能和料效率对于经济可行性至关重要.
- 素和Bacillus licheniformis衍生发酵提取物 (BLFE) 是对乳牛具有潜在益处的料添加剂.
研究的目的:
- 为了研究单独和联合影响的蒙宁素和BLFE生产表现和料效率在哺乳乳乳母牛.
- 评估这些补充剂对营养素消化能力,乳头发酵和血液氨基酸概况的影响.
主要方法:
- 一个2x2的因数实验进行了60 Holstein 牛,使用两个剂量的单酶 (0 和 17.6 毫克/公斤 DM) 和 BLFE (0 和 166 毫克/公斤 DM).
- 测量包括干物质摄入量 (DMI),牛奶产量和成分,体重 (BW) 变化,小肠液挥发性脂肪酸 (VFA),明显全道营养物质消化率 (ATTD) 和血液氨基酸度 (AA).
- 用混合效应模型分析数据,并考虑了基线测量.
主要成果:
- 单独BLFE增加了牛奶产量:DMI和哺乳期净能量 (NEL):DMI,并倾向于增加牛奶产量和蛋白质产量.
- 单独使用宁素增加了BW增益,并倾向于改善成分校正的牛奶产量:DMI,同时提高了牛奶脂肪产量.
- 结合BLFE和单宁素减弱了每个补充剂单独的积极影响,表明潜在的对抗性.
结论:
- BLFE和monensin分别明显改善了牛奶蛋白和牛奶脂肪,并且单独养时提高了料效率.
- 当它们一起食时观察到的对抗性表明,单素和BLFE之间的相互作用需要进一步研究.
- 对于BLFE和monensin对料效率和牛奶脂肪的影响,在原生和多生母牛之间观察到不同的反应.
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