Palabra clave:

Descripción: “...The cows and  the  calves  grazed  on brachiaria  (mixture of Brachiaria  decumbens y  Brachiaria  humidicola)  with amounts  of dry green matter (DGM) varying from 1587 kg DGM/ha during the rainy period (August to November) to 175  kg DGM/ha in the transition and the dry period (December to April). ...”

Descripción: “...The cows were divided into three groups according to their production state (dry period, beginning and peak lactation). Colorimetry was used for determining Ca, P and Mg concentration in blood and descriptive statistics were used for presenting the results. ...”