Efecto del balance catión – anión dietario sobre el metabolismo del calcio sérico como un factor de predicción de hipocalcemia en vacas

Abstract

One of the objectives of the present research was to analyze the effect of the dietary cation-anion balance on the serum calcium level as a predictor of hypocalcemia carried out at the “San Jorge Álvarez” farm in the Balcashi community of the city of Riobamba- In Ecuador, 18 peripartum Holstein cattle were registered, which were classified by number of lactations, 3 groups of 6 animals were obtained for each group of 1 and 2 lactation, 2 to 4 lactation and more than 4 lactations, a linear regression analysis was applied, Pearson's correlation coefficient (r) to verify the correlation and to be able to elicit a hypocalcemia prediction equation between the dietary DCAD with the level of urinary pH, milk production, serum Ca, obtaining values for the latter in bovines of more than 4 lactations of r = -0.8754 and r2 = 0.70 referring to grass so it has an inverse relationship strength and 70% that explains the proportion of the variance of the variable x that cam biara to the variable y, instead of this same group with this same DCAD but based on its production, I obtained values of r = 0.8493 and r2 = 0.6516, which reflects a positive relationship strength with a 65% degree for the change of the variable y by the variance of the variable x.