通过培养猪中的共识性细菌6-植物酶变体对可消化氨基酸的改进进行建模
D Velayudhan1, Y Dersjant-Li1, R Lizardo2
1Danisco Animal Nutrition & Health (IFF), Willem Einthovenstraat 4, 2342 BH Oegstgeest, The Netherlands.
Journal of animal science
|August 1, 2025
概括
这项研究表明,一种细菌植物酶变体 (PhyG) 在生长猪中显著改善了氨基酸消化能力. 这些发现支持将PhyG纳入商业料配方,以提高营养利用率.
科学领域:
- 动物营养 动物营养
- 酶技术 酶技术是一种
- 消化系统生理学 消化系统生理学
背景情况:
- 植物性料成分中的花酸 (PP) 降低了猪的氨基酸 (AA) 消化能力.
- 细菌的6 - 植物酶变体用于改善营养利用,但剂量反应数据可能会有所不同.
- 准确地预测植物酶功效对于优化料配方至关重要.
研究的目的:
- 为了评估细菌6 - 植物酶变体 (PhyG) 对生长猪中氨基酸的明显乳腺消化能力 (AID) 的剂量依赖性影响.
- 为了产生可消化的AA贡献的可靠预测来自PhyG补充剂.
- 为了测试假设,PhyG在各种不同的实验条件下显著提高了ileal AA消化能力.
主要方法:
- 来自5个独立实验 (8个数据集) 的综合数据,涉及325个在生长猪中的观察.
- 利用日志线性回归来建模AA的AID与日志转化植物酶剂量 (0-4,000 FTU/kg) 之间的关系.
- 解释了西班牙,澳大利亚,美国和巴西进行的实验中饮食组成,饮食形式,动物品种和性别的变化.
主要成果:
- 补充PhyG线性地增加了总AA的平均AID,分别在1,000和4,000FTU/kg时改善了3.7和4.5个百分点.
- 在所有个人和总AA中观察到AID的增加,Trp,Thr,Gly和Cys在1,000和2,000FTU/kg时显著增长.
- 该模型预测了负控制饮食中总AA的平均AID为68.6%.
结论:
- 综合数据证实,细菌植物酶-6变体 (PhyG) 增强了生长猪的乳腺氨基酸消化能力.
- 该研究为含有PhyG的商业料配方制定特定饮食的AA矩阵建议提供了基础.
- 补充PhyG提供了一种可行的策略,以提高猪食中的营养效率.
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