1. Prepartum urea serum concentration and the effect on the mineral metabolism of dairy cows in the immediate postpartum.
- Author
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Schimitti, K., Moreira, F., Barth, A. L., Palmeira, M., Peripolli, V., Bianchi, I., Santos, J., Fernandes, L., Schwegler, E., and Ziegler, M.
- Subjects
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DAIRY cattle , *METABOLISM , *PUERPERIUM , *UREA , *ANALYSIS of variance , *LACTATION in cattle , *BLOOD sampling - Abstract
The objective of this study was to verify if the urea serum concentrations in prepartum dairy cows influence the mineral metabolism of magnesium (Mg) and calcium (Ca). Twenty-seven multiparous Holstein cows were selected from two properties. Urinary pH measurement was performed, and blood samples were collected 7 days before the expected calving date, and in the immediate postpartum period, blood samples were collected at 24, 48 and 72 hours. In the blood, serum urea, Ca and Mg concentrations were determined. The data were subjected to analysis of variance and correlation and categorized according to the median prepartum urea concentration into high urea group (HUG) and low urea group (LUG). There was positive correlation between prepartum Ca and Mg (r= 0.85; P<0.05), 24 hours postpartum Ca and Mg (r= 0.74; P<0.05) and prepartum Ca and 48 hours Ca (r= 0.62; P<0.05). HUG animals (46.01 mg/dL) showed subclinical hypomagnesemia at 72 hours postpartum (P<0.05). Higher serum urea concentrations in the prepartum, influenced the mineral metabolism of dairy cows in the immediate postpartum, being detected subclinical hypomagnesemia 72 hours after calving. [ABSTRACT FROM AUTHOR]
- Published
- 2024