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首页> 外文期刊>Revista de salud animal >Relationship between somatic cell counts and milk production and composition in Jersey cows
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Relationship between somatic cell counts and milk production and composition in Jersey cows

机译：泽西奶牛体细胞数与产奶量和组成的关系

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The main components in milk from cows that are affected by mastitis can be in different amounts according to the racial characteristics. Thus, the association between the somatic cell counts (SCC) and these components may also differ in milk from Jersey cows. This study evaluated the effect of the SCC in milk from Jersey cows on milk production and its physicochemical composition. For 71 months, data from 3244 milking and 300 cows were evaluated considering the effect of the SCC on milk production (kg cow day-1), percentage of fat, protein, lactose, total solids, and nonfat solids. The probable factors associated with fluctuation in milk production based on somatic cell score, lactation number and rainfall were also evaluated by regression models. Milk composition was changed according to the SCC. In general, the higher the SCC in milk, the lower the contents of lactose, fat, and solids, with exception of the protein content, which increased. Losses in milk production of Jersey cows were observed for milk with counts above 50,000 somatic cells per ml.
机译：根据种族特征，受乳腺炎影响的奶牛牛奶中的主要成分可以不同。因此，与泽西奶牛相比，体细胞计数（SCC）与这些成分之间的关​​联也可能有所不同。这项研究评估了泽西奶牛产奶中SCC对产奶量及其理化组成的影响。在71个月中，评估了3244头挤奶和300头奶牛的数据，其中考虑了SCC对产奶量（kg母牛第1天），脂肪，蛋白质，乳糖，总固体和脱脂固体的百分比的影响。还通过回归模型评估了基于体细胞评分，泌乳数和降雨量与牛奶产量波动相关的可能因素。牛奶成分根据SCC进行了更改。通常，牛奶中的SCC越高，乳糖，脂肪和固体中的含量就越低，但蛋白质含量增加了。对于每毫升计数超过50,000体细胞的牛奶，观察到泽西奶牛的产奶量减少。

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