Effects of in utero choline exposure on growth, feed efficiency, and carcass quality in Angus x Holstein cattle

    PI: Heather White

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    Heather White is a professor of animal and dairy sciences at UW–Madison and faculty advisor for the Dairy Innovation Hub. Her research program focuses on the health and nutrition of dairy cows during the transition period and is centered on hepatic and whole-animal nutrient partitioning and metabolism. White’s research strives to determine the mechanism of nutrient partitioning, feed efficiency, and metabolic health in order to provide science-based solutions and interventions to improve dairy cow health and productivity.

    Post-doc (pictured above): Billy Brown received his Phd in Dairy Cattle Nutrition from Kansas State University where he broadly studied mechanisms of feed intake regulation, feeding behavior, and feed intake prediction modeling in lactating cows. Brown is mentored by Heather White from the department of Dairy Science.

     

     

    Research suggests that Rumen protected choline (RPC) may positively affect offspring growth, health, and well-being. RPC is typically fed to gestating dairy cows for three weeks prepartum. In utero choline exposure is an intervention which aims to enhance tissue growth and performance in a growing fetus. Currently the optimal timing, duration, and dose of in utero choline exposure is unclear. The objective of this project is to evaluate the effects of in utero choline exposure on growth, feed efficiency, and Carcass quality in Angus x Holstein cattle.

    Publication in Journal of Animal Science – June 2023

     

    Pyrolyzing dairy manure solids to recover manure nutrients

    PI: Rebecca Larson

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    Larson is an associate professor of biological systems engineering and extension specialist at UW–Madison. Her research and extension interests include all areas of biological waste including manure management, handling and treatment of agricultural waste, diffuse source pollution, agricultural sustainability, and waste-to-energy technologies including biogas production from anaerobic digestion.

    Graduate student: Jane Halloran is a graduate student at UW–Madison pursuing a master’s degree in biological systems engineering and is mentored by Rebecca Larson and Joseph Sanford, assistant professor at UW–Platteville. She received a bachelor’s degree in agricultural and biological engineering from the University of Illinois at Urbana-Champaign. Her research experience includes biochar, soil chemistry, and other soil properties.

    Manure nutrients are a valuable crop resource, but losses of manure nutrients are a major concern for dairy systems in Wisconsin. Manure processing to recover manure nutrients can reduce losses and increase livestock system sustainability. Pyrolysis of manure solids can densify manure nutrients as biochar, increasing economically viable transport distances and improving nutrient use efficiency. Halloran joins Larson and Sanford’s team to improve livestock system sustainability by integrating pyrolysis and biochar into manure systems to recover nutrients. In this research, separated manure solids will be dried and pyrolyzed to produce biochar, thus recovering and densifying manure nutrients in the separated solids portion of manure. Prior to biochar production, cation salts will be added to the separated manure solids and pyrolyzed to alter the surface chemistry. The biochar produced with cation salts has shown increased ability to further uptake nutrients from the separated manure liquid stream. Therefore, these biochar’s will be assessed on their nutrient recovery efficiency from separated manure liquid streams to further density nutrients and increase biochar value. The manure based biochars (both with and without cation salts) will then be assessed for nutrient availability using mineralization studies to guide improved use of manure nutrients. The outcomes will identify the potential for biochar integration into manure systems for nutrient recovery and improved manure processing. This work aims to reduce environmental losses of manure nutrients while increasing manure value.

    Joseph Sanford

    Equipment for measuring the rheological properties of ice-cream to predict its mouth-feel sensations

    PI: Bidhan Roy

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    Roy is a professor of mechanical and industrial engineering at UW–Platteville. He specializes in continuum mechanics, biofluid mechanics, applied mathematics and computational methods.

    Tom Zolper

    Large capacity chilled centrifuge for blood sample preparation

    PI: Larry Baumann

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    Baumann, a professor of animal and food science, is also a veterinarian. He teaches a wide variety of courses in CAFES, including a course in dairy production, and has earned a UW–Extension Award for Excellence.

    Sylvia Kehoe

    Fencing project to split milking herd barn from single group to two groups to allow research

    PI: Larry Baumann

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    Baumann, a professor of animal and food science, is also a veterinarian. He teaches a wide variety of courses in CAFES, including a course in dairy production, and has earned a UW–Extension Award for Excellence.

    Greg Zwald

    Ultracold freezer for long-term storage of blood and tissue samples

    PI: Larry Baumann

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    Baumann, a professor of animal and food science, is also a veterinarian. He teaches a wide variety of courses in CAFES, including a course in dairy production, and has earned a UW–Extension Award for Excellence.

    Sylvia Kehoe

    Linear rectal ultrasound probe and blood chemistry analyzer

    PI: James Hampton

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    Hampton is an associate professor and program coordinator of animal and dairy science at UW–Platteville. His research interests include ovarian follicular development and endocrinology.

    Krista Hardyman

    Building capacity for dairy nutrition research: Equipment to track individual feed intake

    PI: Pete Lammers

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    Lammers is an associate professor of animal and dairy science at UW–Platteville. His research interests include novel feedstuffs for livestock, production of livestock for niche markets, and integrated crop and livestock production systems.

    Krista Eiseman

    Analytical balance for in-house production of standards for equipment calibration

    PI: Jill Coleman Wasik

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    Coleman Wasik is an associate professor in the Department of Plant and Earth Science at UW–River Falls. Her research interests include how human activity impacts the transport of nutrients and other contaminants through natural systems. The ultimate goal of her work is to understand how human activities benefit from natural processes while also lessening their impacts on natural systems.

    Holly Dolliver

    Large capacity muffle furnace and related equipment

    PI: Jill Coleman Wasik

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    Coleman Wasik is an associate professor in the Department of Plant and Earth Science at UW–River Falls. Her research interests include how human activity impacts the transport of nutrients and other contaminants through natural systems. The ultimate goal of her work is to understand how human activities benefit from natural processes while also lessening their impacts on natural systems.

    Holly Dolliver