Effect of breed and reproductive management on fertility traits in robotic milking system
DOI:
https://doi.org/10.17205/aweth.5278Keywords:
dairy cattle, fertility, robotic milking systemAbstract
This paper aimed at presenting the reproductive performance of two dairy breeds (Holstein, Hungarian Simmental) with different cow treatment approach (estrus synchronisation: 50-60 days postpartum, estrus synchronisation: 90-100 days postpartum, non-synchronized) in robotic milking system. Records for 6610 milking of 807 lactating dairy cows from 3 commercial dairy farms were analyzed. Later breeding synchronized (90-100 days post partum) Simmental had the lowest number of services per conception. The shortest calving to first service interval was detected for first breeding synchronized (50-60 days postpartum) Holstein cows. The overall pregnancy rate were shown to range between 39.2% and 57.7%. Proportion of primiparous cows confirmed pregnant within 90 days postpartum varied from 46.5% to 70,8%. Comparing milk-based traits of cows with different reproductive status within 150 days in milk can be seen a highly significant influence of milk yield, the average protein content on reproductive status of cows in case of all herds. Finding reveal high-producing Holstein had the poorer fertility features, however synchronization seemed to affect reproductive traits more favorable in primiparous cows. The differences in fertility caused changes in some milk-based traits; however, these results should be confirmed further investigations.
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