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Vliv ročního období na počet somatických buněk v mléce dojnic
Janovská, Michaela
The diploma thesis was focused on the observation of various factors that are closely related to the number of somatic cells in milk of dairy cows. In particular, the season, the month, the order and stages of lactation and their relation to somatic cells, but also to the individual components of milk, were tested. The information was obtained from the performance and self-monitoring of Farmers farm for one year. As regards the influence of the season, the highest number of somatic cells was found in winter (537 thousand) and lowest in spring (365 thousand), but the difference was not statistically conclusive. The influence of the lactation sequence (min. 257,000 on the first lactation and max. 747,000 on the fifth lactation) and the lactation stage influence (min. 382,000 to 100 days of lactation and max. 557,000 over 401 days of lactation) was equally inconclusive ). A higher number of somatic cells in milk was associated with its lower production but higher protein content. The behavior of cows was substantially more balanced in the stable where the proportion of cows lying ranged from 60 % to 67 % than in grazing where it ranged from 3 % to 69 %.
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