16 May 2025

How’s breeding progressing at Moorepark?

One of Teagasc’s flagship dairy research herds, Farm Manager, John Paul Murphy talks us through breeding and provides an update on the progress to date at Moorepark.

Breeding has gotten off to a good start this spring at Moorepark. The Moorepark herd consists of around 300 spring-calving dairy cows. The herd is run on a grass-based system, yielding an average of 6,500 litres per cow. Herd fertility and production remain strong, with the current average EBI standing at €244.

Breeding underway

The breeding season began on April 28, and by May 9 over 62% of the herd had been served. A focused use of sexed semen is a key element of the breeding plan. Around a quarter of all inseminations in the first fortnight use sexed semen, targeting high-EBI cows and maiden heifers. This approach aims to increase the number of replacement heifers while supporting genetic progress.

Heat detection technology

Accurate heat detection is a priority at Moorepark. Heat detection collars are used to track rumination, activity and movement. The system provides real-time alerts when cows come into heat, allowing timely insemination. Cows are typically inseminated 12 hours after signs of heat for conventional AI, and 14-21 hours later when using sexed semen.

Beef sires

Beef AI sires play a role in delivering value from the dairy herd. Breeds used include Angus, Hereford, Charolais and Limousin. Bulls with longer gestation periods are used early in the season, while shorter-gestation Angus bulls are used later. All bulls are selected for ease of calving and matched to suitable cows to reduce risk. The entire programme is AI-based, with no stock bulls used on farm.

Favourable conditions

Conditions on farm have been positive, with strong grass growth rates of 80-90kg DM/ha/day helping to support cow condition and drive performance. Pre-calving body condition scoring has played a significant role in breeding preparation. Several surplus paddocks have already been taken out for silage and the first cut is due to begin this week.

Moorepark Open Day 2025

Moorepark will open its gates for the 2025 Open Day on Wednesday, July 2. Visitors can learn more about the breeding strategies and technologies in place to drive performance.

Find out more about the Moorepark Open Day 2025 here.

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