A seasonal survey of Magnesium serum level in pregnant cross breed cow in Tabriz abattoir

The magnesium, being one of the most important metabolic elements, has a verymajor function in the animals growing processes. Also magnesium has a function instructure and operation of many important enzymes which are effective in metabolicreactions of body. Reduction of serum magnesium rate may conduce to weakness ofimmune system, increase of sensitivity to infectious diseases, growth drop, sexual andbreeding disorders, etc. In this study, during four seasons of year, the bleed accomplishedby using venoject tubes (obtained from jugular vein) from sample randomly, on 400pregnant cross breed cow, apparently healthy at Tabriz abattoir. Immediately, all of theblood samples were transferred to laboratory beside the ice packs. The end of each season,after centrifuging, the serum mg levels were measured by Randox biochemical kit, andusing the spectrophotometry method and then results analysed. In this study mean serumalrate of magnesium varied in different seasons (there was a correlation between Mg levelsand seasonal temperature changes). The lowest level of Mg was measured in winter thataccording to statistical analysis (ANOVA, P<0.001) these variations statistically wassignificant. Results of recent study also showed that there is a significant correlationbetween the age of dairy cattles and their serumal Mg levels (elder cattles had higherserumal levels of Mg, P<0.001). According to results of pierson correlation ratio test therewas not significant relation between fetus age of pregnant cows and Mg levels. This clearreduction Mg level of serum in winter may be the result of excessive using hay in diet, onavailable to green grass and also the excessive cold weather in winter.