不同水平的全玉米芽对肉的能量价值和乳腺消化能力的影响
Elainy Cristina Lopes1, Carlos B V Rabello1, Gabriel M Macambira1
1Universidade Federal de Pernambuco, Departamento de Zootecnia, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, 52171-900 Recife, PE, Brazil.
Anais da Academia Brasileira de Ciencias
|June 12, 2024
概括
这项研究研究了肉年龄和全玉米胚芽 (WCG) 含量水平如何影响营养利用. 对于明显代谢能源的最佳WCG含量,经平衡校正,在18天时被发现.
科学领域:
- 动物营养 动物营养
- 禽畜科学 禽畜科学 禽畜科学
- 料评估 料评价
背景情况:
- 全玉米胚芽 (WCG) 是一种富含营养的副产品,具有作为 brojler 料成分的潜力.
- 了解WCG的最佳含量水平和年龄特定的利用对于料配方至关重要.
- 肉的年龄显著影响营养消化能力和能量代谢.
研究的目的:
- 评估肉年龄和WCG控制饮食的食替代水平对营养和能量利用的影响.
- 为了确定WCG在不同肉生长阶段的最佳含量水平.
- 为了确定肉年龄,WCG含量和营养素消化/代谢能力之间的相关性.
主要方法:
- 一个完全随机的设计实验,在预启动,启动和生长阶段使用720只肉.
- 测试了六种饮食治疗方法,将控制饮食 (CD) 替换为WCG,其水平为0,100,150,200,250和300g/kg-1.
- 使用响应表面方法来分析明显代谢能 (AME),校正的AME (AMEn) 和各种消化率.
主要成果:
- 对于AMEn的最佳WCG含量是在18天后确定的,使用28g/kg-1WCG.
- 在AME和AMEn的静止点分别为4173和3591千卡/千克-1.
- 原蛋白和干物质的体内消化率分别为78.0%和57.96%,年龄,WCG水平和营养利用之间存在显著的相关性.
结论:
- 肉的年龄和WCG含量水平显著影响营养和能量利用.
- 该研究提供了宝贵的数据,用于优化WCG在肉饮食中的含量,以提高料效率.
- 进一步的研究可以根据特定的肉基因型和管理实践来完善WCG利用.
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