Abstract

MARTINEZ, Gabriela et al. Niveles plasmáticos de calcio, magnesio y fósforo en rodeos lecheros del Valle de Lerma, Salta, Argentina. RIA. Rev. investig. agropecu. [online]. 2020, vol.46, n.2, pp.181-186. ISSN 1669-2314.

The dairy production of the Lerma Valley is one of the most relevant regional economies of the province of Salta. In order to known imbalances prevalence of calcium (Ca), phosphorus (P) and magnesium (Mg), 584 dairy cows of 4 farms of basin Lerma Valley were sampled in 4 opportunities. At each visit were bled from the jugular vein of 9/10 animals in each category: prepartum, fresh cow, 2nd and 3rd third of lactation. Values Ca and Mg serum were obtained by atomic absorption spectrophotometry and P values by UV-visible spectrophotometry. Associations between variables were analyzed using linear correlation and linear regression, in addition to analyzing the probability of occurrence of hypocalcemia by odds ratio. Differences between variables and moment of lactation were examined by analysis of variance and Tukey’s test and Chi square using Fisher’s test. The mean serum Ca was 8.85 mg / dl, with no differences found all over the periods. The average prevalence of hypocalcemia was 46.2% in all production periods. The mean serum Mg was 2.26%, with a prevalence of 10.6% hypomagnesemia. Animals with hypomagnesemic had a 3.5 times greater chance of having hypocalcemia compared to those with normal values. The prevalence of animals with abnormal values of P was high (48.3%), without association with hypocalcemia levels. Pursuant to the results obtained in this study are warned of the potential risks of imbalances Ca, Mg and P in the dairy herds Lerma Valley.

Keywords : imbalance; minerals; dairy cows..

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