What has driven the dramatic gains in dairy efficiency over the last several decades? What should the industry focus on next?
In this webinar, Dr. Chad Dechow explores the long-term genetic, nutritional, and management trends that have shaped modern dairy production. Using integrated farm systems modeling, he examines how changes in breeding values, cow management, crop yields, and inbreeding have influenced milk production. In addition, he looks at how these factors affect dry matter efficiency, land use, and economic efficiency. This analysis covers contrasting dairy production systems.
The session also takes a closer look at how component pricing and selection pressure have shifted genetic progress in fat and protein. Furthermore, it discusses why protein-to-fat ratio has become an important consideration for cheese production. These changes may have an important impact on future net merit weighting. Attendees will gain a clearer understanding of the biological and economic forces behind dairy efficiency. At the same time, they will discover the tradeoffs the industry must manage moving forward.
Main Topics & Key Insights
Genetic and Management Trends Driving Dairy Efficiency
This webinar examines how genetic progress and management improvements have contributed to long-term gains in dairy production. While genetic selection has improved traits like milk yield, fat, and protein, management and nutrition have played a significant role in driving phenotypic performance. In certain areas such as somatic cell score and fertility, this impact has often outpaced genetic progress.
Milk Production Gains and Efficiency Improvements
Over time, dairy systems have seen substantial increases in milk production. Total output has effectively doubled when combining genetic improvements, nutrition, and management changes. At the same time, dry matter efficiency has improved across different production systems. This demonstrates more output per unit of feed—even when accounting for replacement animals.
Economic Efficiency: What’s Really Driving Profitability
The presentation highlights how economic efficiency has improved alongside production gains. Income per cow has increased significantly in modern systems. However, it emphasizes an important concept: industry-wide efficiency gains do not necessarily translate into higher profitability. As a result, increased efficiency across all farms can shift market baselines. In turn, this influences milk prices.
The Role of Fat and Protein in Long-Term Gains
Fat and protein have emerged as the primary drivers of economic efficiency improvements in dairy systems. While other traits such as fertility, body size, and inbreeding can negatively impact performance, gains in milk components—especially fat and protein—have delivered the largest economic returns over time.
Shifting Protein-to-Fat Ratios and Market Implications
Recent genetic selection has led to a rapid increase in milk fat percentage, particularly in Holstein cattle. However, this has created challenges in maintaining an optimal protein-to-fat ratio. This ratio is critical for cheese production. When fat increases faster than protein, processors may face added costs to rebalance components. In turn, this impacts overall industry efficiency.
Genetic Selection Challenges and Tradeoffs
The webinar explores the limitations of genetic selection, including:
– The impact of inbreeding on performance
– Differences in variability between fat and protein traits
– The challenges of improving protein without further increasing fat
– The influence of major genes (such as those affecting fat production) on selection outcomes
– These factors highlight the complexity of balancing productivity with long-term sustainability.
Evaluating and Evolving Net Merit and Selection Indexes
Dr. Dechow also examines whether current net merit formulas accurately reflect modern dairy systems. Key considerations include:
– The need for more dynamic weighting of fat and protein values
– Accounting for feed intake costs associated with increased production
– Differences between “average” and “typical” farms and how they affect economic modeling
Future Considerations: What Are We Missing?
The session raises important questions about emerging traits that may become more relevant in the future, including:
– Digestibility and feed efficiency
– Methane and sustainability considerations
– Colostrum quality and other under-monitored traits
