脂质补充剂的类型对小牛初始饮食中的料颗粒大小有着至关重要的影响
Pedram Panahiha1, Hamidreza Mirzaei-Alamouti2, Mehdi Kazemi-Bonchenari3
1Department of Animal Science, University of Zanjan, Zanjan, 45371-38791, Iran.
Journal of animal science and biotechnology
|September 3, 2023
概括
料颗粒大小和脂质类型显著影响小牛的食量和生长. 使用棕脂肪酸 (PLF) 的长颗粒草干草提高了性能,而使用长颗粒干草干草的大豆油 (SBO) 损害了乳头发育.
科学领域:
- 动物科学动物科学
- 乳制品营养 乳制品营养
- 动物生理学 动物生理学
背景情况:
- 在小牛食中添加料是很常见的,通常需要补充脂质以获得能量.
- 脂质可以对食功能和食消化能力产生负面影响.
- 料颗粒大小和脂质来源之间的相互作用对小牛的发育至关重要.
研究的目的:
- 为了研究草花粉颗粒大小 (长与短) 和脂质来源 (大豆油与棕油脂肪酸) 对年轻奶牛犊的影响.
- 为了确定最佳的组合,初始摄入量,生长和毛发育.
- 评估对营养素消化能力和肠微生物合成指标的影响.
主要方法:
- 一个2x2的因数设计研究使用霍尔斯坦小牛 (n=13每次治疗).
- 处理包括短 (SP) 或长 (LP) 颗粒大小的花干草,用大豆油 (SBO) 或棕脂肪酸 (PLF).
- 脂质补充 (25 g/kg DM) 和牛奶养是标准化的;数据收集在断奶前和后.
主要成果:
- 在料颗粒大小和脂质来源之间观察到显著的相互作用.
- LP-PLF最大化了初始摄入量,平均每日增益 (ADG) 和乳头发育指标 (精氨酸衍生物).
- LP-SBO导致最低的初始摄入量和功能受损;SBO增加了氧化应激标志物.
结论:
- 建议用长颗粒草干草食,食无活性,和脂肪酸来源 (PLF),以获得最佳的小牛表现.
- 大豆油 (不和脂肪酸) 与长颗粒干草相结合,对初始剂的摄入量和小发育有害.
- 如果使用大豆油,则最好使用短颗粒料来支持奶牛养小牛的功能.
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