细菌直接养微生物组合对肉牛生长表现,养行为,营养消化能力,反动物形态和尸体特征的影响
Alejandra M Lopez1, Jhones O Sarturi1, Bradley J Johnson1
1Department of Animal and Food Sciences, Texas Tech University, Lubbock, TX 79409, USA.
Journal of animal science
|January 8, 2024
概括
直接养的微生物 (DFM) 改善了养场肉牛的生长和尸体重量. 治疗-A,一个特定的DFM混合物,提高了平均每日增益和增益效率,同时也倾向于增加最终的体重和热尸体重量.
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:
- 直接养微生物 (DFM) 用于调节肠道微生物群并提高动物的表现.
- 特定的细菌组合和比例可能会对牛生理和生长产生不同的影响.
- 了解DFM对养场牛的影响对于优化生产效率至关重要.
研究的目的:
- 为了评估特定细菌直接养微生物 (DFM) 混合物对料场肉牛生长,尸体特征,营养消化能力,养行为和食者乳头形态的影响.
- 为了比较两个不同的DFM治疗比率 (Treat-A和Treat-B) 与对照组的影响.
主要方法:
- 192只杂交的安格斯牛被分配给一个随机的完整块设计,每次治疗有四个 (控制,治疗A,治疗B) 持续153天.
- 治疗涉及蒸汽片玉米基饮食,不含DFM (控制),治疗-A (特定的DFM混合物在1:1:1:3的比例) 或治疗-B (相同的DFM混合物在1:1:3:1的比例).
- 评估了生长表现,尸体特征,营养消化能力,养行为和牛皮的形态. 数据使用GLIMMIX程序进行分析.
主要成果:
- 与对照群相比,接受Treat-A养的小牛的平均日益增加了6.7% (P=0.03) 和增益效率提高了6% (P<0.01).
- 处理A还倾向于增加体调整后的最终BW (+15公斤,P=0.07) 和热体重量 (+10公斤,P=0.07).
- 与对照组相比,治疗B组在生长,尸体特征或营养消化能力方面没有发现显著差异. 干物质摄入量和大多数尸体特征不受治疗的影响.
结论:
- 在Treat-A中,特定的DFM混合物对料场肉牛的生长性能和屠宰体重产生了积极的影响.
- 治疗-A还显示了改善干物质和纤维消化能力的趋势.
- 经测试的DFM组合似乎没有影响养行为,牛肉形态或牛肉氨度.
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