Calcium metabolism around time of Parturition in dairy cows fed on concentrates in Egypt | ||
| Veterinary Medical Journal (Giza) | ||
| Volume 63, Issue 1, January 2017, Pages 127-134 PDF (4.27 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/vmjg.2017.355018 | ||
| Authors | ||
| N El-Mashad* 1; S Orabi2; N Salem1; M Khattab1 | ||
| 1Department of Medicine and Infectious Diseases, Faculty of Veterinary Medicine, Cairo University | ||
| 2Department of Nutrition and Clinical Nutrition, Faculty of Veterinary Medicine, Cairo University | ||
| Abstract | ||
| The objective of this experiment was to determine the acid-base-balance and calcium metabolism in dairy cows feed on concentrates in Egypt. 40 late pregnant cows (more than 240d), having completed three or more lactations, with an expected calving date within the next three weeks were selected. The animals were randomly allocated to 2 groups which were offered the same diet first group consists of 20 native breed and second group consists of 20 Holstein cows. Mean age and body weight did not differ between the groups. Sample of blood and urine were collected 21 days before the expected day of parturition from each cow weekly, on the day of caving and the next two days Creatinine, urine pH, Fractional excretion and Net acid-base excretion (NABE) were measured in blood and urine | ||
| Keywords | ||
| Hypocalcemia; Milk fever; calcium homeostasis; calcium mobilization; dairy cow; subclinical acidosis; DCAD | ||
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