Evaluación de la preñez según la concentración espermática con el uso de Iatf en bovinos de leche mestizos

Abstract

In dairy cattle in the area, female cattle usually present too long intervals between calving due to the presence of anestrus, calves at foot or poor feeding, delaying milk production, thus, fixed-time artificial insemination (FTAI) with the use of protocols becomes a solution, therefore, the objective of this research was to evaluate pregnancy according to sperm concentration by the method of fixed-time artificial insemination (FTAI) in crossbred dairy cattle. The methodology implemented had a quantitative approach, with a randomized complete block design with three treatments of 20 replicates each, for the analysis of variance and the separation of means, the Tukey statistic was used. The variables evaluated were: pregnancy rate at 30 days and at 60 days, conception percentage and cost per pregnant cow. Through this methodology, significant differences were determined with respect to the pregnancy rate at 30 days, with T1 being the best treatment with 60%, followed by T2 with 55%, the pregnancy rate at 60 days did not show significant differences, but there were mathematical differences since T1 remained at 60% while T2 registered 50%, the conception percentage was 46.67% while the cost per pregnant cow, T1 presented a cost of 191.07 USD. It is concluded that the use of sexed semen in crossbred dairy cows in the area shows good results in terms of pregnancy rate, thus contributing a good cost benefit by guaranteeing the presence of females for future replacement in production.