ارزيابي مقادير منيزيم و كراتينين ادرار گاوهاي هلشتاين و دو رگ شيري اروميه

Evaluation of urine magnesium and creatinine concentrations in Holstein and hybrid dairy cows in Urmia

Urine magnesium (Mg) and creatinine concentrations in 93 dairy Holstein and hybrid cows in Urmia was investgated to determine the concentrations of Mg and creatinine in urine and possible diagnosis of subclinical hypomagnesaetnia. Creatinine assessement was considered as the normal activity of kidneys. Urine samples were collected by using spontaneous urination, rectal examination and urine catheterization into 10 ml tubes. Urine Mg and creatinine concentrations were calculated using Mg and creatinine commercial kites in spectrophotometer. Mg and creatinine were observed in all samples. The range for Mg and creatinine were 0.05-7.71 mmol/l and 15.6-30 mg/dl. Urine Mg classified into >1.5 mmolll as the cows with high serum Mg concentration, 0.42-1.49 mmol/l for the cows with suspectible to low serum Mg concentration and <0.41 mmolll as the cows with hypomagnesamia. The distribution and percent of experienced cows were 78 and %83.87, 10 and %9.67, 5 and %6.45, respectively. Mean SE of urine creatinine in three groups were 22.7 + 3.4, 20.6 :t: 2.7 and 21.1 ± 4.2. respectively. The values were in recommended range and differences were not significant. Thus, it can concluded that Mg can excreted into urine healthy cows and its concentration depends on the concentration of Mg in blood. Low urine Mg concentration probably considered as the cow at the risk of subclinical hypomagnesemia when kidneys to be at health.