D-vitamin status of cattle depending on the conditions of detention and physiological state


  • L. L. Yuskiv Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies Lviv, Ukraine
  • V. Vlizlo Institute of Animal Biology of NAAS, Lviv, Ukraine https://orcid.org/0000-0002-7685-9853
Keywords: cows, calves, vitamin D3, metabolism, blood, 25-hydroxycholecalciferol

Abstract

The article contains data on the content of active metabolite of vitamin D3 – 25OHD3, calcium, phosphorus, magnesium and activity of alkaline phosphatase in the blood of cows and their calves in the early postnatal period. The experiment was conducted on cows-analogues of the Ukrainian Black-and-White dairy breed during the dry period and after calving and on calves received from them. The experiment was performed during the winter period of the stall at the Lviv region farm. The blood for tests was collected from the jugular vein before morning feeding at 3–5 days before calving and in the 5th–7th and 55th–60th days after calving. The blood from the calves was collected in the following dates: on the first day and at 5th–7th days old and at 55–60th days old.  It was established that, the content of 25-hydroxycolecalciferol in blood calves on the first day after birth was 18.90 ± 2.08 nmol/l. In subsequent periods of study, its level decreased, in particular, at 5th−7th days old it was 1.52 times lower (P < 0.05), and in the at 55–60th days old – 2.07 times (P < 0.01) than on the first day old age during the winter period of the stall. Changes in the content of 25OHD3, total calcium and its fractions, inorganic phosphorus, magnesium and activity of alkaline phosphatase and its isoenzymes in the blood of cows in the prenatal and lactation periods have been determined. In particular, the content of 25OHD3 was 18.7 ± 2.27 nmol/l at 3–5 days before calving in the blood of cows, on the 5–7th day after calving continued to decrease and amounted to 15.8 ± 0.83 nmol/l, and on the 55–60th day of the postpartum period it increased to 20.5 ± 2.08 nmol/l.

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Published
2018-11-13
How to Cite
Yuskiv, L., & Vlizlo, V. (2018). D-vitamin status of cattle depending on the conditions of detention and physiological state. Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies. Series: Veterinary Sciences, 20(88), 141-146. https://doi.org/10.32718/nvlvet8826