Evaluation of selected biochemical milk parameters of dairy cows and their correlations | Zhodnotenie vybraných biochemických ukazovateľov mlieka dojníc a ich korelácie
2010
Filipejová, T., Slovak Univ. of Agriculture in Nitra (Slovak Republic) | Kováčik, J., Slovak Univ. of Agriculture in Nitra (Slovak Republic) | Capcarová, M., Slovak Univ. of Agriculture in Nitra (Slovak Republic) | Kolesárová, A., Slovak Univ. of Agriculture in Nitra (Slovak Republic) | Kirchnerová, K., Slovak Univ. of Agriculture in Nitra (Slovak Republic) | Foltýs, V., Slovak Univ. of Agriculture in Nitra (Slovak Republic)
The aim of this study was to evaluate selected biochemical parameters in milk and their correlations. Ten dairy cows from chosen agricultural farms were divided into two groups. I. group: 3-4 weeks after calving (the beginning of lactation), II. group: 3-4 months after calving (the middle of lactation). Concentrations of some biochemical parameters: fats, proteins, lactose, solids, Somatic Cell Count, urea, freezing point of milk and rennetability in milk were analyzed. In this study, high positive significant correlation has been detected between fats-solids (r = 0.96), fats-SCC (r = 0.88), proteins-solids (r = 0.67), solids-SCC (r = 0.82), REN-urea (r = 0.76), high negative correlation between solids-urea (r = -0.75), SCC-urea (r = - 0.77) at the beginning of lactation. Moreover, high positive significant correlations has been found between fats-solids (r = 0.99), fats-urea (r = 0.96), fats-REN (r = 0.82), proteins-SCC (r = 0.99), solids-urea (r = 0.92), solids–REN (r = 0.75), urea- REN (r = 0.95), and high negative correlation between proteins-lactose (r = -0.87) and SCC-lactose (r = -0.84) in the middle lactation. In conclusion, we found some positive and negative high and middle significant correlations between parameters of milk at the beginning of lactation and in the middle of lactation.
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