MACROMINERALS SERUM LEVELS IN THE POST-PARTUM PERIOD IN DAIRY COWS RAISED IN ALGERIA

The aim of this study was to determine the evolution of some serum macrominerals in dairy cows, in order to
determine the relation with milk fever (MF), and retained placenta (RP) occurrence. The present study was
conducted on 15 Prim Holstein dairy cows during 2015 in Tiaret at the west of Algeria. All cows were subjected to a
general clinical examination before taking blood samples. In all samples Calcium (Ca), Inorganic phosphorus (P)
and Magnesium (Mg) were determined for each cow at the dry period (DP), in the immediate post-partum (IPP) and
15 days post-partum (PP). The data obtained were subjected to statistical analysis using the ANOVA procedure.
The analysis of variance and LSD test were used to estimate the probability of the significance of statistical
differences. In this work Ca and P serum levels were significantly the lowest in IPP cows with 78.4±20.2 mg/l and
33.0±24.6 mg/l respectively (p<0.05). However serum Mg levels in this study was lowest in postpartum cows with
18.9±2.9 mg/l compared with other peripartum stages but not significantly (p>0.05). In this work we concluded that a
decreasing in Ca, P and Mg occurs in dairy cow mostly in peripartum.