Implementación de dos protocolos de sincronización en vacas de raza Holstein y Jerhol con anestro prolongado en la hacienda Paysandú - Antioquia Colombia.

Abstract

A batch of 8 cows from the Holstein and Jerhol breeds, with an average age of 6 years, belonging to the Paysandú agricultural station is reported. These cows follow a regular vaccination and deworming plan, prioritizing milk production. This case was conducted to identify the main causes of prolonged anestrus in breeding cows and to implement two synchronization protocols: OVSYNCH and the conventional Benzoate plus Progesterone at a fixed time (IATF). An initial characterization of the batches was carried out, recording the information in logbooks. Daily reviews were conducted in the three batches of low, medium, and high production, revealing open days equal to or greater than 50 days, and ineffective services in several cows. The diet provided both in the milking module and in grazing was also evaluated. The physical examination showed vital signs within normal ranges, such as respiratory rate, heart rate, body temperature, and capillary refill time. It was decided to implement two fixed-time synchronization protocols, dividing the batch into two groups: group A, the conventional benzoate plus progesterone protocol, and group B, the OVSYNCH protocol. Upon analyzing the results, typical estrus behaviors were observed, such as mounting within the batch and allowing mounting. On the other hand, the vulva was observed to be irritated, and the secretion of characteristic estrus mucus in the 8 cows subjected to the protocols. The effectiveness of artificial insemination (AI) was 75% in OVSYNCH and 25% in the benzoate plus progesterone protocol. It is relevant to highlight that the percentages were high due to the small number of animals used in both protocols.