Evaluación de concentraciones sanguíneas de Beta Hidroxibutirato en bovinos doble propósito en el rancho agropecuario “Adriana Patricia” del cantón Balzar.

Abstract

The increase of Beta-hydroxybutyrate (BHB) in blood leads to ketosis and negative energy balance (BEN). The objective of this research was to evaluate the blood concentrations of beta-hydroxybutyrate in dual-purpose cattle at the "Adriana Patricia" ranch, using the FreeStyle machine. Eighty lactating cows were sampled. The results showed the presence of BHB concentrations compatible with BEN (≥0, 5 mmol/L) and subclinical ketosis (≥ 1 mmol/L). The farm was logistically divided into three sectors, sector 1 with 30 animals, sector 2 with 30 animals and sector 3 with 20 lactating animals, 70 % of the cows were in the first third of lactation, 11% in the second third and 19% in the third third. Sector 1 showed 47 % of BEN and 10% of subclinical ketosis, sector 2 showed 37 % of BEN and 17 % of subclinical ketosis, sector 3 showed 70 % of BEN and 5 % of subclinical ketosis.There was no relationship between milk production and increase of ketone bodies, with reference to BEN and milk production (R square 0.001), Ben and body condition (R square 0.0004), as for the subclinical ketosis animals with reference to subclinical ketosis and milk production (R square 0.02), as for subclinical ketosis and body condition (R square 0.007). The sector that had a higher presence of BEN with respect to the 3 sectors is sector 3 with 70 % and the one with the highest index of subclinical ketosis is sector 2 with 17 %.