放牧泽布肉牛的自愿摄入量,消化能力和表现的分娩期间变化,有或没有蛋白质补充
Gabriel Santos Souza David1, Ellém Maria de Almeida Matos2, Bianca Rodrigues Domingos1
1Departament of Animal Science, Universidade Estadual Paulista, Jaboticabal 14884-900, SP, Brazil.
Animals : an open access journal from MDPI
|June 19, 2024
概括
蛋白质补充剂在产前期改善了牛肉牛的表现. 补充奶牛在母体组织中显示出更高的平均每日增益 (ADG),尽管在分娩前干物质摄入量 (DMI) 自然减少.
科学领域:
- 动物科学动物科学
- 类动物营养 类动物营养
- 牛肉牛生产 牛肉牛生产
背景情况:
- 产后期对牛肉牛的健康和生产率至关重要,涉及显著的生理变化.
- 在这个阶段,营养管理,特别是蛋白质补充,可能会影响奶牛的表现和小牛的发育.
研究的目的:
- 评估蛋白质补充剂对肉牛在周边生育期间的营养参数和表现的影响.
- 评估干物质摄入量 (DMI),原蛋白 (CP) 摄入量,平均每日增益 (ADG) 和身体状况评分 (BCS) 的变化.
主要方法:
- 40头肉牛被分配到对照组 (CON) 或蛋白质补充剂 (SUP) 组.
- 在分娩前和分娩后的不同阶段进行了消化性试验.
- 在整个研究期间测量了DMI,CP摄入量,ADG和BCS.
主要成果:
- 蛋白质补充剂显著影响了DMI和CP摄入量 (p ≤0.044).
- 从分娩前30天到15天,DMI显著下降 (14.37%),随后在分娩后20天增加72.7%.
- 补充牛表现出较高的总和母体组织ADG (p ≤0.02),而妊娠组织ADG没有受到影响.
结论:
- 随着分娩的临近,肉牛自然减少干物质的摄入量.
- 在产前期补充蛋白质可以提高牛的整体性能,特别是在母体组织中.
- 战略补充可以减轻减少摄入量的负面影响,并支持牛的健康和生产力.
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