Medycyna Wet. 67 (5), 332-334, 2011
Krupa W., Budzyńska M.
Influence of certain parameters of milk production on the content of selected bio-elements in cows’ hair
The aim of the study was to determine the influence of the rank and period of lactation, and the daily milk yield on the levels of selected macro-, micro- and ultraelements (Ca, Cr, Cu, Fe, I, K, Mg, Mn, Mo, Na, P, S, Se, Zn) in cows’ hair. The experiment was carried out on 93 Holstein–Fresian dairy cows aged from 3 to 5 years, kept in the same breeding conditions. The method of atomic emission measurement with an optical spectroscopy technique was used. The factors analyzed were found to exert significant influence on the levels of Cr, Fe, K, Mo, and Na in cows’ hair.
Keywords: dairy cows, bio-elements, hair, lactation