بررسي فصل ميزان سرمي كلسيم فسفر و آلكالين فسفاتاز در گاو هاي شيري كشتار شده در كشتارگاه تبريز

Seasonal evaluation of serumal Ca, P and ALP of slaughtered cattle in Tabriz abattoir

Increasing knowledge of metabolic disorders and prevention of any prduction decrease is beneficial in animal breeding. Problems related to calcium and phosphorus deficiency in high producing animals are among the most important metabolic disorders with disease such as osteomalacia, rickets, milk fever, pos parturition hemoglobinuria and reproductive disorders named as the metabolic complications. This study was conducted on non pregnant crossbreed dairy cattle. In the middle of each season with daily referral to the abattoir, blood samples were collected in veneject tubes and after transfer to the laboratory, the serumic levels of Ca, P and ALP were measured by spectrophotometry. One hundred samples for each season and a total of 400 samples were studied. The mean serumic levels of Ca, P and ALP were 8.83±0.02 mg/dl, 3.88±0.07 mg/dl, 163.4±0.8 Iu/lit; 9.05±0.03mg/dl, 4.19±0.01mg/dl, 240.7±1.2 Iu/lit; 9.03±0.07 mg/dl, 5.33±0.02mg/dl, 185.06±2.3 Iu/lit and 9.33±0.09 mg/dl, 5.74±0.08 mg/dl, 230.03±7.4 Iu/lit, in the spring, summer, autumn and winter respectively. Considering the normal Ca, P and ALP values in cattle, 6.3% and 83% of cases had Ca and P deficiency respectively in the spring, 80% of cases had subclinical phosphorus deficiency in the summer, 7.3% of cases had subclinical phosphorus deficiency in the autumn and 9.45% and 7.36% of cases had Ca deficiency and ALP elevation respectively in the winter. The significant decrease in Ca and P levels in the spring and P levels in the summer (p<0.05) is probably to due to the use of green forage with high carotene levels which interferes with Vit D absorption while Ca reduction in the autumn and winter can be due to the cold weather, hand made diets and low sunshine. The increase in ALP levels also correlates with Ca deficiency in the winter. Furthermore reduction of the serumic levels of Ca and P in the age of 4-5 years was significant (p<0/01) compared with the other ages which could be due to high production at this period.