Did you know that flat lactation curves are believed to be associated with fewer health and reproduction problems in your dairy cows? Take the opportunity to use this information as a modern tool in your dairy operation.
Since 2006, the Nordic Cattle Genetic Evaluation (NAV) has calculated breeding values for persistency, which provides information about the shape of the lactation curve.
For example, bulls with EBV (Estimated Breeding Values) above 100 (high persistency) will produce daughters that have a flatter lactation curve with a lower yield than expected in the first part of the lactation, and a higher yield than expected in the last part of the lactation, compared to bulls with a lower EBV for persistency.
Recently, dairy farmers have shown an increased interest in lactation persistency as a management tool because flat lactation curves are believed to be associated with fewer health and reproduction problems.