Health status of the mammary gland, quality and price of milk
Milk prices are (along with cost) major economic item in breeding dairy cows. At prices fixed by dairies, there is a certain possibility of increasing price by improving the milk quality indicators. Since most milk quality indicators are related to the health status of udder of cows, the relationship between quality indicators and milk prices has been assessed. The bulk milk samples were in the years 2012 to 2015 collected in 11 experimental stables. Market milk production reached 7 999 liters per cow per year, with fluctuations between stables from 6 150 to 10 523 liters. The evaluation showed that the average numbers of somatic cells vary according to production area, herd size, milking technique and milking number. For the 2012-2015, of all 522 samples, average somatic cell count was 209 thousand per milliliter, the total number of microorganisms was 25 thousand per milliliter, the milk fat was 3.84%, and the protein content was 3.39%. From the correlation and regression relationships, it appears that the main quality indicators evaluated can be improved by reducing the number of somatic cells in milk. The results found in the relationship between the composition of pool samples and milk prices have shown, among other things, that indicators can be used to estimate their impact on the milk purchase price.
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