Reproductive Management of Dairy Cows with Particular Reference to Organic Systems Michael G Diskin & Frank Kelly Animal Production Research Centre, Teagasc, Mellows Campus, Athenry, Co. Galway. Biological Efficiency. Reproduction . Production Efficiency. Profitability.
Reproductive Management of Dairy Cows with Particular Reference to Organic Systems Michael G Diskin & Frank KellyAnimal Production Research Centre, Teagasc, Mellows Campus, Athenry, Co. Galway.
Compact Calving: 90% calved in < 80 days
Low Culling Rate for infertility: < 5%.
Calving Interval: 365 day calving-to-calving.
Shortening Post-partum interval
Improving Reproductive efficiency
Dairy CowsMean=26 days(15-50 Days)
Beef CowsMean=55 days(25-180 Day)
Postpartum reproduction - cattle
Aim to have a calf per cow per year with peak lactation to correspond with peak grass growth
Main Factors Affecting Pregnancy Rate
Heat Detection Rate
Primary Sign of Heat
Mucous vaginal discharge
Factors affecting the Expression of heatTeagasc, Athenry Results
Management Factors Affecting Conception Rate
British Friesian 1980
Holstein Friesian 2005
10-15% decline in conception for each 0.5 unit change in BCS between calving and AI.
Use High EBI (Economic Breeding Index sires)
Production: Yield fat + Protein
Reproduction: Calving interval