农场因素与散装储牛奶中自由脂肪酸的增加有关
Hannah M Woodhouse1, Stephen J LeBlanc1, Trevor J DeVries2
1Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada N1G2W1.
Journal of dairy science
|November 9, 2024
概括
较高的挤奶频率和不经常更换牛奶过器会增加散装牛奶中的自由脂肪酸 (FFA). 没有预冷也会增加FFA. 需要进一步的研究来确定牛奶质量的所有风险因素.
科学领域:
- 乳制品科学 乳制品科学
- 动物科学动物科学
- 食品质量 食品质量 食品质量
背景情况:
- 散装牛奶中自由脂肪酸 (FFA) 的增加是一个重大问题,与淡味,味和加工稳定性的降低有关.
- 高度的FFA (≥1.20 mmol/100 g脂肪) 对乳制品质量和奶酪制造潜力产生负面影响.
- 现有关于FFA的研究是有限的,特别是在北美,欧洲的研究表明多因素原因.
研究的目的:
- 为了确定与加拿大乳牛群中散装坦克牛奶中自由脂肪酸 (FFA) 升高相关的农场级风险因素.
- 调查安大略省和不列颠哥伦比亚省奶牛场的挤奶系统,管理实践和FFA度之间的关系.
主要方法:
- 这是一项涉及加拿大安大略省和不列颠哥伦比亚省293家乳制品农场的跨度研究,持续了两年.
- 数据收集包括农场调查,挤奶系统评估,奶牛饮食信息,以及来自牛奶营销委员会的大型坦克FFA分析.
- 使用多变量线性回归来建模FFA度,考虑农场类型 (,客厅,AMS) 和管理实践.
主要成果:
- 平均散装箱FFA为0.84 mmol/100 g脂肪,其中10%的牲畜超过1.20 mmol/100 g脂肪值.
- 增加的挤奶频率 (≥3次/天) 与自动化挤奶系统 (AMS) 和牛排系统中的更高的FFA有关.
- 不经常更换牛奶过器 (每天≥2次) 和没有预冷也与FFA水平升高有关.
结论:
- 挤奶频率,牛奶过器管理和预冷是影响加拿大大批量牛奶FFA度的重要农场级因素.
- 自动化奶制系统 (AMS) 和牛排系统显示,与客厅系统不同,在更高的奶制频率下,FFA增加.
- 其他因素,可能包括季节性变化,牛奶成分和个体奶牛的健康状况,需要进一步调查,以充分了解和减轻高FFA水平.
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