Milk profile test
1996
Zadnik, T. | Jazbec, I. | Nemec, M. | Pengov, A. (Ljubljana Univ. (Slovenia). Veterinary Fac.) | Klopcic, M. (Ljubljana Univ. (Slovenia). Biotechnical Fac., Zootechnical Dept.)
Our findings are based on the evaluation of 1.547 weekly bulk milk samples, 7.699 individual milk controls and 887 analyses of blood samples. Milk samples from four regions in Slovenia were weekly collected on 30 farms in 1993 (n = 12) and in 1994 (n = 18) and analyzed for fat, protein, lactose, urea, sodium, potassium, acetone concentrations and somatic cell count. A coefficient between fat/protein and protein/urea was also calculated. The model of multiple analyses of variance revealed that the results of milk analyses were statistically significantly (P0,05) influenced particularly by the year of the investigation, farm, season (winter-summer feed intake) and to a lesser extent (P0,05) by the health status of the udder (SCC x1000/ml) and ketolactia. With the analysis of variance we have concluded that different feed statistically significantly influenced the following blood parameters: TSP, Alb./Glob. ratio, alpha2-Glob., beta-Glob., urea, and glucose. Different protein and energetic feed intake statistically significantly influenced the following milk parameters: proteins, urea, and ketones. However, a statistically significant difference in lactose concentration is not a result of the nutrition but of the impaired secretion of the udder gland. In 1995 we established lead (Pb) in bulk milk and blood of dairy cows on 6 farms in the Meza Valley. We found on average 0,0192 +/-0,009 ppm in milk and 0,1583 +/-0,0052 ppm Pb in blood (n
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