Evaluation of macrominerals concentrations in blood of lactating and dry Desi cows

Evaluation of macrominerals concentrations in blood of lactating and dry Desi cows

ABSTRACT

Objective. This study was conducted during winter season at rural livestock farm of district Sargodha, Pakistan, in order to define the macrominerals status in blood plasma of lactating and dry Desi breed cows . Material and methods. Twenty lactating and twenty dry cows were used and their blood plasma was analyzed for Ca, Mg, Zn, Cu and Fe using atomic absorption spectrophotometer. Results. In lactating cows, the plasma Ca concentration was lower than dry cows (6.8 vs. 7.6 mg/dl, p<0.001), while Mg concentration was similar between lactating and dry cows. Plasma Zn concentration in lactating cows was higher than dry cows (0.78 vs. 0.60mg/l, p<0.01) and it resulted lower than the normal range in both groups. Plasma Cu level in lactating cows was lower than dry cows (0.56 vs. 0.76 mg/L, p<0.001) and it was lower than the normal range only in lactating cows. Lactating cows resulted in higher plasma Fe concentration compared to dry cows (3.8 versus 2.6 mg/L; p<0.01). Conclusions. From our findings, it can be concluded that the observed minerals level meets the needs of ruminants and the plasma level of different minerals is affected by the physiological stages of cows.

RESUMEN

Objetivo. Este estudio se realizó durante la estación de invierno en la granja de ganado rural del distrito de Sargodha, Pakistán, con el fin de definir el estado de macrominerales en el plasma sanguíneo de vacas lactantes y secas de raza Desi. Materiales y métodos. Veinte vacas lactantes y veinte vacas secas fueron utilizadas y se analizó el plasma para el Ca, Mg, Zn, Cu y Fe utilizando un espectrofotómetro de absorción atómica. Resultados. En las vacas lactantes, la concentración de Ca en plasma fue menor que en las vacas secas (6.8 frente a 7.6 mg/dl, p<0.001), mientras que la concentración de Mg fue similar entre las lactantes y las vacas secas. La concentración plasmática de Zn en las vacas lactantes fue mayor que en las vacas secas (0.78 frente a 0.60 mg/L, p<0.01) y resultó inferior al rango normal en ambos grupos. Nivel de plasma de Cu en vacas lactantes fue inferior al de las vacas secas (0.56 vs a 0.76 mg/L, p<0.001) y fue inferior al rango normal sólo en las vacas lactantes. Las vacas lactantes resultaron en mayor concentración de Fe plasmático en comparación con las vacas secas (3.8 frente a 2.6 mg/l, p<0.01). Conclusiones. A partir de los resultados, se puede concluir que el nivel de minerales observados satisface las necesidades de los rumiantes y el nivel plasmático de diferentes minerales se ve afectado por las etapas fisiológicas de las vacas.

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