Graduate Student Literature Review: Organic dairy cattle longevity and economic implications-Contemporary...

Area of Science:

• Dairy Science
• Animal Economics
• Sustainable Agriculture

Background:

• Limited research exists on the longevity of organically raised dairy cattle compared to conventional systems.
• Understanding factors affecting dairy cattle longevity is crucial for herd management and profitability.

Purpose of the Study:

• To discuss factors influencing dairy cattle longevity.
• To conduct an economic assessment of prolonged longevity for organic dairy cattle.

Main Methods:

• A dynamic programming tool was used to determine optimal replacement decisions based on retention pay-off (RPO) value.
• Economic variables (milk price, calf value, costs) and herd-level inputs were modeled for typical organic and conventional Texas dairy farms in 2024.
• Data from on-farm herd management software informed herd-level inputs.

Main Results:

• Retention pay-off (RPO) values varied by lactation stage, pregnancy status, and production level, with pregnant cows showing higher RPO.
• Organic dairy systems consistently demonstrated higher RPO values across lactation stages and production levels compared to conventional systems.
• Organic farms exhibited higher RPO in 805 out of 900 scenarios, indicating a financial advantage for longer productive lifespans.

Conclusions:

• Optimizing productive lifespan through dynamic culling decisions enhances profitability in organic dairy herds.
• Organic dairy farming systems present a more favorable economic outlook for extended cow longevity than conventional systems.
• The study highlights the economic benefits of strategic herd management for organic dairy producers.