Sirvi Autor "Lehtinen, Patrik Kalevi" järgi

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Estrotect © as an indicator of fertile heat compared to visual detection in dairy heifers
(Eesti Maaülikool, 2021) Lehtinen, Patrik Kalevi; Kask, Kalle (juhendaja); Kaart, Tanel (juhendaja)
Heat detection and the precise timing of animals in true estrus has become one of the most important challenges in modern-day dairy farming. Additionally, replacement animals are more often artificially inseminated. A well-managed replacement herd breeding program is crucial for a farm to achieve the most economical profit. In this study, we compared Estrotect heat detection devices with ordinary visual heat detection (two times per day). The aim was to compare the results of using heat detection aids with the labor concerning practice of visual heat detection. A total of 142 Holstein and 30 Estonian Red breed heifers were selected as a group inseminated according to Estrotect devices; for the second group, heat was detected visually in 92 Holstein and 14 Estonian Red breed heifers. All animals selected to this study were inseminated for the first time. When inseminated according to Estrotect device, 66.9% of Holstein heifers and 36.7% of Estonian Red heifers became pregnant. When heat was detected visually, 71.7% of Holstein heifers and 71.4% of Estonian Red heifers became pregnant. According to this study, Estrotect can be a useful aid to improve the fertility results of replacement herds in farms with problems related to visual heat detection management.