Desempenho reprodutivo de vacas nelore submetidas a IATF no agreste da Paraiba

Abstract

Beef livestock is a sector of strategic importance in the context of the world economy and aiming to increase the productivity of the herds, the use of reproductive biotechnologies is presented as an important tool. Fixed-time artificial insemination (FTAI) is currently the most used reproductive biotechnology to improve reproductive performance in beef cattle. The present study sought to evaluate the reproductive performance in Nelore cows based on the success rate of the FTAIs performed and the fertilization rate per bull used at Fazenda Jucurí, located in Caldas Brandão-PB, during the years 2020 and 2021. Data for the evaluation were collected from the individual zootechnical records of each FTAI and from the property's performance record. In the years 2020 and 2021, five rounds of FTAIs were carried out, with an overall average of 48.21% confirmed pregnancy without transfer to the bulls on the property. With transfer, this rate rose to 57.38% of pregnancy. Therefore, it can be concluded that the productivity results using the FTAI protocols obtained were satisfactory, since they are in agreement with the average observed in the literature.