Determination of copper and zinc in ration and blood serum of dairy cows in Chaharmahal va Bakhtiari Province in comparison with standard levels.

A total of 260 blood and 40 ration samples were randomly collected from four regions of Chaharmahal va Bakhtiari Province including Farsan, Boroujen, Lordegan, Shahrekord and Zagros dairy farm. According to the results, the averages concentrations of copper in ration samples of Farsan, Boroujen, Lordegan, Shahrekord and Zagros dairy farm were 15.4, 20.11, 16.12, 21.13 and 28.54 mg/kg, respectively. In this study there was a significant relationship between average milk production and ration copper (p<0.05).. Average copper blood serum in different regions was 0.68, 0.77, 0.69, 0.72 and 0.55 mg/L, respectively. The average of ration zinc was 70.78, 88.43, 69.95, 82.11 and 62.16 mg/kg for Farsan, Boroujen, Lordegan, Shahrekord and Zagros dairy farm, respectively. There was a significant relationship between ration zinc and milk production (p<0.03) and between blood serum zinc and milk production (p<0.001). The results showed that there was not copper and zinc deficiency in ration and blood serum of dairy cows in Chaharmahal va Bakhtiari Province.