Article 2022 · 1 citations

The negative effects of cold conditions on pregnancy rates in dairy cows

CengIz, Mehmet, Hayirli, Armagan, BallI, Bulent

Abstract

This study was conducted to determine the pregnancy rate in response to two sexual synchronization protocols in 70 healthy multiparous Fleckvieh dairy cows during the cold and warm seasons. After pairing by the actual parturition date [cold seasons (-38 to 0 degrees C) (Nov - Feb) vs. warm seasons (0 to 32 degrees C) (Mar-Oct)], cows were randomly subjected to either Co-Synch (CoS) or double PGF(2 alpha) injection (dPG) on d 35 postpartum. Data were subjected to Chi-Square (chi(2)) analysis to determine the pregnancy rate at the first service. Overall pregnancy rates (%) at the first service were 57.1 and 40.0 for Groups CoS and dPG, respectively (chi(2) = 2.03, P = 0.15) and 35.0 and 66.7% during cold and warm seasons, respectively (chi(2) = 6.78, P = 0.009). The protocol effect on the pregnancy rate at the first service was insignificant during cold (chi(2) = 1.17, P = 0.28) and warm (chi(2) = 1.62, P = 0.20) season. In summary, the cold conditions negatively affected the pregnancy rate at the first service. The synchronization protocol methods did not differ to improve the pregnancy rate at the first service when cows were exposed to cold conditions.

Keywords

Cold condition dairy cow first service pregnancy rate synchronization protocol REPRODUCTIVE-PERFORMANCE HEAT-STRESS HOLSTEIN COWS SYNCHRONIZATION BEHAVIOR CATTLE ESTRUS CLIMATE INSEMINATION MANAGEMENT

WoS Categories

Veterinary Sciences

Sustainable Development Goals

Good Health and Well-being

Citation

Journal: ANKARA UNIVERSITESI VETERINER FAKULTESI DERGISI
Year: 2022
Volume: 69
Issue: 1
Pages: 77-82
ISSN: 1300-0861
eISSN: 1308-2817
DOI: 10.33988/auvfd.791139
WoS UID: WOS:000739868000010

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