Impact of herd characteristics and breeding practices on the reproductive performance of dairy cows in Northeastern Algeria
DOI:
https://doi.org/10.19182/remvt.36798Keywords
cattle, dairy cows, fertility, livestock numbers, ovulation, AlgeriaAbstract
The study investigated the effects of herd characteristics (breed, size, parity and study area) and husbandry practices (induced/ natural heats, flushing or not, and drying-off duration) on the fertility and fecundity rates of 721 Montbeliarde (n = 379) and Prim’Holstein (n = 342) dairy cows (DC) from 23 herds, born and bred in Algeria. Fertility parameters revealed an interval between calving and first heat of 86.8 ± 48 days, between calving and first artificial insemination (AI) of 108 ± 80.4 days, between first AI and fertilizing AI of 42.9 ± 85.2 days, between calving and fertilizing AI of 152 ± 116 days, and between calvings of 427 ± 122.8 days. A mean first AI success rate of 54.8 (DC) and 38.8 ± 20% (herd), an apparent fertility index of 1.83, and 19.3% DC inseminated three times or more (in 16.2 ± 11 of the herds) were recorded. Fertility was far from the objective. Breed had no significant effect on fertility (p > 0.05), but reproductive performance varied significantly (p < 0.05) with herd size, parity, study region, induced or natural heat, and whether or not flushing was practiced. Fecundity was lower in animals with a drying-off duration of more than 60 days (p < 0.05). Late breeding beyond 80 days postpartum was the parameter that most affected the reproductive performance of DC in the study area.
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© A.Haou et al., hosted by CIRAD 2021
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