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HHNC Speakers and Sessions

Phil CardosoDr. Phil Cardoso

University of Illinois

Dr. Phil Cardoso is an associate professor at the University of Illinois at Urbana-Champaign.  He received his D.V.M., and M.S. degrees from the Universidade Federal Do Rio Grande do Sul in Brazil, and his Ph.D. from the University of Illinois. Since 2012, Cardoso has established a unique program that seamlessly blends his teaching, extension, and research efforts. Phil’s Dairy Science program impact by placing students in applied positions and academia. Phil and his students have published over 70 peer-reviewed manuscripts (original research and invited reviews) and 3 invited book chapters to date. The program builds from questions asked by dairy producers and focuses on having the dairy cow’s diet as a medical prescription for performance, health, and reproduction. That is achieved by understanding the impact of nutrition on metabolism, reproduction, and health in dairy cows, as well as mechanisms of metabolic adaptation to stressors and forage quality. 

Presentation: New Perspectives in Transition Cow Management (11:00 AM)
Dr. Cardoso will discuss key nutritional strategies and feeding management during the pre-calving and post-calving periods. He believes that the impacts of the transition program should be evaluated in a holistic way that considers disease occurrence, productivity, and fertility.

Trevor DeVriesDr. Trevor DeVries

University of Guelph

Dr. Trevor DeVries is a Professor and Canada Research Chair in the Department of Animal Biosciences at the University of Guelph. Trevor received his B.Sc. in Agriculture from The University of British Columbia (UBC) in 2001, and his Ph.D. from there in 2006. After spending one year as a post-doctoral fellow with Agriculture and Agri-Food Canada, in 2007, he was appointed as faculty with the University of Guelph in the Department of Animal Biosciences. In that position Trevor leads a highly productive research program focused on dairy cattle nutrition, management, behavior, and welfare. Trevor works diligently to extend that work to the field. Trevor also contributes to teaching at the university, including instructing undergraduate and graduate courses in the areas of dairy cattle management, behavior, and welfare, as well as coaching the university Dairy Challenge team.

Presentation: Keeping Things Consistent at the Feed Bunk! (1:10 PM)
Dairy cow production, health, and efficiency are optimized when they eat a consistent diet, both in time and composition. From a feed bunk management perspective, this includes ensuring rations are delivered accurately and precisely, as well as by ensuring cows have good continuous access to that feed.

Presentation: Feed Bunk Management Panel Discussion (2:05 PM)

Luiz FerrarettoDr. Luiz Ferraretto

University of Florida

Dr. Luiz Ferraretto is originally from Brazil where he earned his B.S. in Animal Science from São Paulo State University in 2008. Immediately after the completion of his B.S. Degree, Luiz joined University of Wisconsin-Madison for an internship (2009) followed by a M.S. (2011) and Ph.D. (2015) in dairy science with focus on applied dairy nutrition and forage quality. After the completion of his Ph.D., Luiz joined The William H. Miner Agricultural Research Institute as a Post-doctoral Research Associate. Currently, Luiz is an Assistant Professor of Livestock Nutrition in the Department of Animal Sciences at University of Florida and his research interests are applied dairy cattle nutrition and management with emphasis on starch and fiber utilization by dairy cows, corn silage and high-moisture corn quality and digestibility, the use of alternative by-products as feed ingredients, and supplementation of feed additives to lactating cows.

Presentation: Optimizing the Role of Starch as an Energy Source in Dairy Cattle Diets (12:15 PM)
This presentation will discuss the importance of starch to dairy cows and strategies to optimize its digestibility and utilization by lactating animals.

Corwin Holtz

Holtz-Nelson Dairy Consulting

Corwin Holtz is President of and an active consultant in Holtz Nelson Dairy Consultants, LLC. - a group of eight independent dairy nutrition and management consultants working with dairy producers in New York, Pennsylvania, Ohio and the New England states.  Corwin formed this group in early 2004.  The groups focus is on maximizing cow health and productivity through the use of client grown forages and grains and supplying management consultation over a wide variety of daily management topics that impact farm profitability, land resource use and environmental stewardship.

Presentation: Feed Bunk Management Panel Discussion (2:05 PM)
The panel will feature a discussion of on-farm feeding management focusing on such topics as: their definition and economic measurements of feeding/bunk management, use of on-farm feeding software, feed refusal goals and use of refusals, handling weather (rain and snow) events and their impact on bunk management and feeding economics, managing/tracking/measuring shrink in both forages and grains, forage bunk face management, timing of feeding and feed push-ups, feed personnel training and monitoring, feeding equipment maintenance programs.

Bill WeissDr. Bill Weiss

The Ohio State University

Bill Weiss is a Professor in the Department of Animal Sciences at The Ohio State University located in Wooster. He has been on the faculty since 1988 with a joint research:extension appointment. His main research interests include methods to estimate diet energy, incorporating variation into ration formulation and relationship between micronutrients and cow health. He has authored more than 500 journal and popular press articles and is a frequent speaker at national and international conferences. He was a member of the 2001 Dairy National Research Council (NRC) committee and is currently serving as vice chair of the 2018 Dairy NRC committee.

Presentation: Energy and Protein Interactions (10:05 AM)
Protein (i.e., amino acids) and energy are the two nutrients most likely to limit milk production, but because they are so interrelated it is difficult to separate their effects. This session will discuss how dietary protein affect energy supply (independent of dry matter intake) and how changes in energy supply affect how cows respond to changes in protein supply. The effect of stage of lactation on the interaction between protein and energy will also be discussed