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大量牛奶体细胞数量的季节性动态在挪威牧场奶山羊的牧场

Marit Smistad¹, Ragnhild Aab E Inglingstad¹, Siv Skeie²

¹TINE SA, R&D Department, Farm Advisory Services, Chr. Magnus Falsens vei 18, 1432 Ås, Norway.

JDS communications

|April 22, 2024

概括

季节性变化显著影响奶羊奶体细胞计数 (SCC). 根据季节和哺乳期调整SCC值对于准确的牛奶质量评估和群体管理至关重要.

科学领域:

乳制品科学乳制品科学
动物养殖动物养殖
兽医医学兽医医学兽医医学

背景情况:

体细胞计数 (SCC) 是牛奶质量的关键指标,但其在奶山羊中的解释因季节等非传染性因素而复杂.
了解季节性变化对于准确的乳健康评估和乳山羊的牛奶质量管理至关重要.

研究的目的:

量化挪威乳山羊按季节和哺乳阶段解释的散装牛奶SCC的变化.
调查不同季节和哺乳阶段SCC和其他牛奶质量参数 (总细菌数,脂肪,蛋白质,乳糖) 之间的关联.

主要方法:

观察性研究分析了一年来88个挪威山羊群的5180个散装牛奶样本.
收集的数据包括例行牛奶分析和来自记录系统和问卷的群体信息.
统计分析以确定季节和哺乳期对SCC和其他牛奶成分的影响.

主要成果:

散装牛奶SCC在放牧季节显著增加 (中位数为1100000细胞/毫升),相比于室内春季期间 (中位数为470000细胞/毫升).
季节和哺乳期相结合解释了53.5%的散装牛奶SCC.的变化.
脂肪和蛋白质含量因季节和哺乳期而异,与SCC的联系很弱. 乳糖和总细菌数量显示了与SCC,季节和哺乳阶段的显著关联.

结论:

季节性变化和哺乳阶段在很大程度上影响乳母山羊奶SCC,使其被认为是乳腺健康的唯一指标.
牛奶质量评估所确定的SCC值需要根据季节和哺乳阶段进行调整,以提高其诊断和管理实用性.
准确地解释乳山羊的SCC需要考虑除了感染之外的环境和生理因素.

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