玉米加工和断奶年龄对小牛的表现,血液代谢产物,乳头发酵和行为的影响
A Rahimi1, G R Ghorbani1, F Hashemzadeh1
1Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
Scientific reports
|July 3, 2023
概括
与粉碎玉米相比,蒸汽粉碎玉米 (SFC) 起始料改善了小牛的表现和营养消化. 这种增强的料对早期和晚期断奶的小牛都有好处,显示体重增加和更好的营养利用.
科学领域:
- 动物科学动物科学
- 类动物营养 类动物营养
- 牛犊管理管理
背景情况:
- 优化小牛的初级饮食对于早期生活表现和长期健康至关重要.
- 玉米加工方法显著影响年轻反动物的营养可用性和消化能力.
- 断奶年龄是影响小牛适应和生长的关键因素.
研究的目的:
- 为了评估蒸汽粉碎玉米 (SFC) 与初级饮食中的粉碎玉米 (GC) 的影响.
- 评估两次奶年龄 (50天和75天) 对小牛的表现的影响.
- 为了确定对小牛生长,血液代谢产物,乳头发酵和营养消化的综合影响.
主要方法:
- 一个2x2的因数设计,有48只荷尔斯坦小牛 (3天大,体重约41.4公斤).
- 治疗方法:SFC或GC结合50或75天的断奶.
- 提供牛奶替代品和初始配给 (大豆粉,玉米,小麦),测量到93天.
主要成果:
- SFC启动器改善了体重增加,干物质,原始蛋白质和NDF消化能力.
- 在SFC的小牛体内,血液中的白蛋白和尿素N含量较低,但总蛋白质和球蛋白含量较高.
- SFC增加了挥发性脂肪酸和食时间; 乳头pH或氨-N.没有显著变化.
结论:
- 蒸汽碎片玉米基的初始料可以提高小牛的表现和营养消化.
- SFC初始饮食对血液代谢物有积极的影响,特别是在早期断奶的小牛中.
- SFC初始料对早期 (50天) 和晚期 (75天) 断奶小牛有益.
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