engleski

Blood biochemical indicators of bone metabolism of calves in the neonatal period

Bone metabolism of Simmental calves in the neonatal period was investigated by monitoring of biochemical indicators in the blood. Investigations were carried out on 9 calves held together with their mothers and fed only on their mother’s milk. Blood samples were collected from jugular vein 6, 12, 48 hours and 7 and 14 days after birth. Serum concentrations of parathyroid hormone (PTH) and calcium and activity of bone-specific alkaline phosphatase (BALP) were determined. Serum concentrations of PTH 6 hours after birth were significantly higher compared with that 7 days after birth (p<0.05) and 12 hours after birth compared with the 7 and 14 days after birth (p<0.05). The highest activity of BALP in calves serum was recorded 7 days after birth, the lowest activity of BALP were recorded 48 hours after birth and differed significantly from the values recorded in all other sampling times (p<0.05). Serum concentration of calcium was significantly higher 14 days after birth compared with that 48 hours after birth (p <0.05). In calves, negative correlations were observed between serum activities of BALP and calcium concentrations 6 and 12 hours after birth (r=-0, 683, r=-0.714, p<0.05, respectively). The changes observed in calves serum indicate that the bone metabolism of calves in the neonatal period is very intense and directed on the synthesis of bone tissue.

calves; bone metabolism; neonatal period

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