EFFECT OF AGE ON SOME PHYSICAL AND BIOCHEMIAL BLOOD PARAMETERS OF HOLSTEINFRESIAN HEIFERS

This study was conducted at al-ameria research station ,ipa agriculture research center on 20 Holstein-Fresian (HF) which divided according to their age into five groups as follows; 3,5,8,10 and 12 months , The aim of the this study was to investigate the influence of age on some Blood parameters(hematological and biochemical) of young (HF) heifer in Iraq. Blood samples were collected weekly from October to December. The blood parameter studied were the hemogloin concentration ,packed cell volume ,erythrocyte sedimentation rate ,cholesterol concentration , urea ,glutamic oxaloacetic and pyruvic transamines ,total serum protein ,albumin and globulin concentration .Data obtained from this study indicated that different age of heifer (3-12 month) were not effected significantly on the whole blood parameter studied unless the glutamin pyruviat transaminase enzyme which increased significantly for heifer aged between 5-8 month than other. Also the beta globulin concentration was significantly increase for heifer aged between 8-12 month in compared to the young heifers.