BLOOD MINERAL STATUS INFLUENCE ON MINERAL NUTRITIONAL VALUE OF MILK OBTAINED FROM A DAIRY FARMING INTENSIVE SYSTEM
Published in Scientific Works. Series C. Veterinary Medicine, Vol. LXII, Issue 2
Written by Gheorghe V. GORAN, Elena ROTARU, Liliana TUDOREANU, Emanuela BADEA, Victor CRIVINEANU
Milk from cattle species is an important part of human alimentation due to its mineral content, among other nutritional substances. Researchers have conducted studies to improve milk nutritional value, even reaching genetic manipulation in order to enrich cow milk with lysozyme, lactoferrin, and lactalbumin, components usually found in human milk. Mineral concentration in milk is an important quality parameter for human nutrition. Mineral concentrations from raw milk and blood were measured by inductively coupled plasma optical emission spectrometry (ICP-OES) in samples taken from 15 dairy cows farmed in a dairy farming intensive system situated in the south of Romania. Blood concentrations of all analyzed minerals registered strong difference to their concentration in milk. However, strontium concentration in milk is linearly correlated to calcium concentration in milk. This finding suggests that calcium and strontium use similar transporters at cellular level and compete for the same transport system. There has not been found a positive correlation between the milk obtained from daily production and the blood level of some minerals, although it can be observed that at productions of 53.9 L/day all elements, with the exception of iron, have higher levels comparative with the lowest milk production (15 L milk), that could be explained by the differentiated feeding required by the productive capacity of animals.