Ruminant Nutrition Research

Paul Kononoff, Professor of Animal Science, hooks up Lila, a 10-month-old jersey cow, in the portable booth, where her breath will be measured and sampled to determine the amount of methane produced by the animal. To measure the gas, a cow is surrounded by a phone-booth like structure where the cow eats and drinks as the air is collected and sampled.

Our ruminant nutrition research is centered on addressing the real-world challenges faced by the cattle industry. We are committed to advancing knowledge in efficient, profitable, and sustainable cattle production, conducting innovative research that has a significant impact in Nebraska and beyond.

Explore Our Research

Beef Systems Initiative at ENREEC

The goal of the Beef Systems Initiative (BSI) is to develop and support implementation of beef production systems that optimize feed resource use, natural resource conservation, and producer success in Nebraska through improved management of perennial grasslands and systems of integrated crop-beef cattle production.

cattle in a pasture

Ongoing Research Projects:

Carbon Footprint Quantification

  • Measuring and assessing the impacts of management practices on the carbon footprint of cattle production to improve sustainability.

Microbiome and Methane Reduction

  • Developing approaches to improve nutrient utilization and reduce methane emissions by manipulating the cattle microbiome.

By-products and Alternative Feeds

  • Investigating the use of by-products and alternative feeds in beef and dairy rations to enhance cost-efficiency and sustainability.

Feed Additives for Finishing Cattle

  • Exploring the use of feed additives to improve growth rates, efficiency, and profitability in finishing cattle systems. 

Cow-Calf Production with Limited Forages

  • Evaluating strategies for cow-calf production that address challenges posed by limited access to perennial forages.

Integrated Crop-Cattle Systems

  • Studying the selection and grazing management of cover crops and annual forages to optimize both environmental and economic outcomes in integrated systems. 

Nutrient Use in Dairy Cattle

  • Investigating how different diets affect nutrient use, excretion, and energy utilization in lactating dairy cattle, with the goal of improving efficiency.

Gut Microbiome and Animal Health

  • Examining how gut microbial structure and function influence animal nutrition, health, and performance in cattle. 

Meet the Faculty

  1. Avatar for Mary Drewnoski
    Professor & Beef Systems Extension Specialist Animal Science University of Nebraska-Lincoln
    Work
    Address
    ANSC C220F
    Lincoln NE 68583-0908
    Phone
    Work 402-472-6289 On-campus 2-6289
    Email
    mary.drewnoski@unl.edu
    Website
    Website
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    Social Media
  2. Avatar for Galen Erickson
    Nebraska Cattle Industry Professor of Animal Science & Beef Feedlot Extension Specialist Animal Science University of Nebraska-Lincoln
    Work
    Address
    ANSC C220
    Lincoln NE 68583-0908
    Phone
    Work 402-472-6402 On-campus 2-6402
    Email
    gerickson4@unl.edu
    Website
    Website
    Social Media
  3. Avatar for Samodha C. Fernando
    Professor Animal Science University of Nebraska-Lincoln
    Work
    Address
    ANSC C220k
    Lincoln NE 68583-0908
    Phone
    Work 402-472-0518 On-campus 2-0518
    Email
    samodha@unl.edu
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  4. Avatar for Paul Kononoff
    Professor & Dairy Nutrition Extension Specialist Animal Science University of Nebraska-Lincoln
    Work
    Address
    ANSC C220j
    Lincoln NE 68583-0908
    Phone
    Work 402-472-6442 On-campus 2-6442
    Email
    pkononoff2@unl.edu
    Website
    Website
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    Social Media
  5. Avatar for James C. MacDonald
    Professor and Graduate Committee Chair Animal Science University of Nebraska-Lincoln
    Work
    Address
    ANSC C220i
    Lincoln NE 68583-0908
    Phone
    Work 402-472-6780 On-campus 2-6780
    Email
    jmacdonald2@unl.edu
    Website
    Website
  6. Avatar for Kacie McCarthy
    Assistant Professor & Beef Cow-Calf Extension Specialist Animal Science University of Nebraska-Lincoln
    Work
    Address
    ANSC C214
    Phone
    Work 402-472-6074 On-campus 2-6074
    Email
    kacie.mccarthy@unl.edu
    Website
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  7. Avatar for Keara O'Reilly
    Rsch Assoc Professor Animal Science University of Nebraska-Lincoln
    Work
    Address
    c203 ANSC
    Lincoln NE 68583-0908
    Phone
    Work 402-472-3571 On-campus 2-3571
    Email
    koreilly2@unl.edu
    Website
  8. Avatar for Karla Wilke
    Professor & Cow-Calf Stocker Management Specialist Animal Science University of Nebraska-Lincoln
    Work
    Address
    4502 Ave I
    Scottsbluff NE 69361-4939
    Phone
    Work 308-632-1245
    Email
    kjenkins2@unl.edu
    Website
    Website
  9. Avatar for Ruth Woiwode
    Assistant Professor & Animal Behavior and Well-Being Extension Specialist Animal Science University of Nebraska-Lincoln
    Work
    Address
    ANSC C219
    Lincoln NE 68583-0908
    Phone
    Work 402-472-3247 On-campus 2-3247
    Email
    ruth.woiwode@unl.edu
    Website
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    Social Media
  10. Avatar for Yijie Xiong
    Assistant Professor & Precision Livestock Management Extension Specialist Animal Science University of Nebraska-Lincoln
    Work
    Address
    ANSC C217
    Lincoln NE 68583-0908
    Phone
    Work 402-472-3246 On-campus 2-3246
    Email
    yijie.xiong@unl.edu
    Website
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EMERITI: Don Adams (Beef Nutrition), Dennis Brink (Ruminant Nutrition), Charles Hibberd (Ruminant Nutrition), Terry Mader (Beef Nutrition & Production), Ivan Rush (Ruminant Nutrition), Jack Whittier (Ruminant Nutrition)

Agricultural Research Division

Supporting the Science to Ensure Resilient Food Systems and a Healthy Global Future

Through the dedicated and innovative work of Faculty and Staff based in 15 Academic Units across the Institute of Agriculture and Natural Resources (IANR) and College of Human Sciences, the Agricultural Research Division is able to help address the grand challenges of global food and water security by working to answer questions important to Nebraska and the World.

researchers working on robotic farm equipment