与原牛奶的高稳定性相关的变量表征
Fernanda Antunes Martins1, Marina Tolentino Marinho2, Vivian Fischer3
1Department of Animal Science, Ponta Grossa State University, Ponta Grossa, Paraná, Brazil.
The Journal of dairy research
|February 19, 2024
概括
在冬季和养场系统中,原牛奶的稳定性更高,受电离和乳糖水平的影响. 不稳定的非酸性牛奶 (UNAM) 的发生率很低,与营养管理和热应激有关.
科学领域:
- 乳制品科学 乳制品科学
- 食品化学 食品化学
- 动物养殖 动物养殖
背景情况:
- 牛奶的酒精稳定性对于加工和质量至关重要.
- 不稳定的非酸性牛奶 (UNAM) 可以影响乳制品产量和安全性.
- 影响牛奶稳定性的因素需要在不同的养殖系统中进一步研究.
研究的目的:
- 用酒精测试来分析原牛奶的稳定性.
- 确定影响牛奶稳定性和UNAM发生的因素.
- 为了将牛奶成分和农场管理与酒精稳定性相关联.
主要方法:
- 在夏季和冬季从帕拉纳州的农村农场收集牛奶样本.
- 分类农场为牧场,补充和料区系统.
- 分析了牛奶的稳定性,可定位的酸度,电离 (iCa),化学成分,体细胞计数和标准板数.
主要成果:
- 牛奶稳定性在冬季和夏季以及在养场和牧场系统中更高.
- 稳定性与电离负相关,与乳糖含量正相关.
- 电离和乳糖是UNAM在72%酒精的关键决定因素;iCa,酸度,乳糖和牛奶尿素为UNAM在78%酒精的关键决定因素.
结论:
- 在经营良好的奶牛群中,UNAM的频率较低.
- 营养管理和影响iCa和乳糖水平的热应激可能与UNAM有关.
- 了解这些因素可以提高原牛奶的质量和加工稳定性.
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