Efecto del suminisitro de tres niveles de grasa by pass en los parámetros reproductivos de las hembras bovinas charoláis mestizas en el canton Tiwintza, parroquia Santiago.

Abstract

The objective of this work was to evaluate the effects of three levels of by-pass fat supply on the reproductive parameters of crossbred Charolais female cattle in the Tiwintza canton through a field investigation at the "Wilfrido Calle" cattle ranch in Santiago parish. An experimental research was developed with a completely randomized design establishing an experimental sample of 20 female bovine units between 3 and 4 years old and an average of 2 to 3 births, distributed in 4 treatments (T0=0, T1=50, T2=100, T3=150) grams of fat by pass and a control sample, that is, without any type of intervention. An independent variable, the amount of by-pass fat administered in each treatment and the independent variables of body condition, initial weight, final weight, presence of dominant follicle, presence of estrus, conception rate and number of services per conception were analyzed. The feeding of the animals was based on gramalote pasture with a grazing system by herding. The results of final body condition showed better conditions when 50 grams of by pass fats were added to the animal's diet and the weight gain during the research reached 5.20 kilograms; while, on the presence of predominant follicles there is no significant difference in relation to the use of by pass fats. It is concluded that the addition of feed supplements such as fat by pass has no influence on the reproductive parameters of the cows. It is recommended to prolong the period of the diet before gestation so that the development of the animal is more balanced.