Comparison and correlations among macro-mineral concentrations in drinking water and milk of dairy cows in Urmia

Macro-minerals in diet and water are the main sources of milk minerals in cows.
1) Determination of macro-mineral concentrations and their local variations 2) Relationships among minerals in cow's milk and water consumption.
A 110 water and milk samples were prepared in north, south, west and east of Urmia, Iran. A 10 ml water and milk from each cow collected and analyzed for minerals. Data were assessed by case summaries, ANOVA and correlation methods.
Milk calcium, magnesium and potassium were higher than in water and water sodium was higher than in milk. The lowest and highest mineral concentrations in water were phosphorus and sodium and in milk were potassium and calcium, respectively. The mean sodium and potassium in water and milk and chloride in water were different among locations (P The concentrations of milk calcium and water sodium were the greatest elements. Milk and water sodium and potassium levels were different among Urmia distinct with the greatest in the east. Water minerals were not correlated with each other but milk calcium, phosphorus and magnesium did. Water and milk calcium and magnesium showed positive correlations with each other, thus, calcium and magnesium could provide the mineral necessities in milk yield.