Abstract
Bone metabolism is closely connected to calcium metabolism. Biochemical markers of bone metabolism in blood serum and/or urine are indicators of bone metabolic activity at real time. Disorders of bone metabolism represent a significant scope of health problems in cattle. The objective of the study was the evaluation of bone-alkaline phosphatase (BALP) a marker of bone formation and C-terminal telopeptide (CTX), a marker of bone resorption in blood serum in dairy cattle of different ages and different productive stages. The following groups of Slovenian Black and White breed cattle were investigated: calves, primiparous cows and cows in the fourth or higher lactation kept in tie-stalls type and cows at early dry off period after the fourth or higher lactation in tie-stalls type and on pasture. Calves have statistically significantly higher BALP values in blood serum than cows (P < 0.05). Statistically significantly (P < 0.05) higher values for BALP and CTX were obtained also in primiparous cows at the pick of lactation than in the fourth or higher lactation cows at the same phase of lactation. We found statistically significantly lower (P < 0.05) mean BALP blood serum activity in cows at early dry off that were housed in tie-stall type than in those on pasture. The difference in mean BALP between cows in the fourth or higher lactation at pick lactation and those at early dry off period was not statistically significant. Biomarkers of bone metabolism can be implemented in monitoring cattle bone metabolism and calcium metabolism.
Published Version
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