Efecto reproductivo y productivo de grasas bypass como alternativa para la nutrición y alimentación de ganado lechero Holstein

Abstract

Abstract The present study evaluated the effects of the addition of bypass fats or the so-called passing fats on the reproductive and productive behavior in 12 Holstein crossbred cows in Chimborazo, Ecuador. The cows were randomly selected and divided into a control group and three treatment versus TO groups – T1: (90 gr of fat + balanced); T2: (180 gr of fat + balanced); and T3: (270 gr of fat + balanced). The variables analyzed were milk production (kg), body condition at delivery (CCP), body condition at service (CCS), days to first heat, and days to second heat. The experiment continued for 60 days. An ADEVA was performed to check the significance between the treatments using the IBM SPSS Statistics 25, with a comparison of means using the Tukey test. The measures of central tendency were obtained: Mean:Standard Deviation. Statistically significant differences were observed for milk production in kg (p 0.05). The bypass fat supplementation had effects that favored milk production, which is why the benefit of these fats was demonstrated as a strategy to improve reproductive and productive indicators, since at the time of pregnancy the cow loses weight. Undernourishment especially in energy intake prolongs open days, delays follicular development, widens the interval between parturition and first fertile heat or the heat interval and the first service.

Keywords

• holstein, production, reproduction, bypass fats, body condition.