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玉米料与不同玉米加工的结合对加工的性能和尸体特征的影响

Jessica L Miller¹, Nolan R Meier¹, Karla H Wilke¹

¹Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583, USA.

Translational animal science

|July 30, 2024

概括

包括高达30%的玉米料在干玉米或蒸玉米的最终饮食中,改善了牛的生长和尸体特征. 与干玉米饮食相比,蒸汽玉米饮食带来了更高的收益和更好的料效率.

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:

优化加工饮食对于最大限度地提高牛的生长性能和尸体质量至关重要.
在完成饮食中加入玉米料可以影响营养摄入量,生长和健康.
玉米加工方法 (干与蒸汽) 影响营养消化能力和牛的表现.

研究的目的:

评估在干玉米 (DRC) 或蒸玉米 (SFC) 饮食中不同玉米料含量水平 (0-45%) 对牛生长和尸体特征的影响.
调查玉米料和玉米加工方法在牛的表现之间的潜在相互作用.

主要方法:

进行了一项4x2的因数实验,对480只杂交牛进行了测试.
在DRC或SFC饮食中,治疗涉及四个玉米料含量水平 (0%,15%,30%,45%的DM基础).
测量了生长性能 (BW,ADG,DMI,G:F) 和尸体特征 (HCW,脂肪深度,大理石化).

主要成果:

玉米料和玉米加工之间的显著相互作用影响了干物质摄入量 (DMI).
增加玉米料线性增加了DMI,并对增长,尸体重量和料效率产生了二次影响.
与干玉米 (DRC) 饮食相比,蒸玉米 (SFC) 饮食导致更高的最终BW,热尸体重量 (HCW),平均每日增益 (ADG) 和料效率 (G:F).
肝脏的发生率较低,玉米料含量为15-45%,而含量为0%.
在DRC或SFC饮食中,高达30%的玉米料含量没有对ADG或HCW产生负面影响.

结论:

在不影响生长或尸体特征的情况下,玉米料可在肉牛加工食中加入高达30%的料.
与干玉米相比,蒸汽粉碎玉米的加工提高了生长性能和料效率.
加入玉米料可能会降低养场牛肝的发生率.

关键词:

玉米加工玉米加工玉米料玉米料玉米料完成了牛头的完成工作.包容性包容性包含性

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