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Methane reduction in dairy cows – can feed additives be combined?

PhD defence, Friday 23 February 2024, Morten Maigaard

Morten Maigaard Sørensen

During his PhD studies, Morten Maigaard investigated the potential of feed additives (dietary fat, nitrate, and 3-NOP) to reduce methane emission from dairy cows. Methane is a natural byproduct of the digestion in cows but constitutes a major part of the greenhouse gas emissions from livestock production. Morten investigated if promising individual feed additives could be combined to obtain large methane reductions, and whether the feed additives affected cows’ production performance. When methane emission is reduced, the emission of hydrogen often increases. Morten also investigated if this excess hydrogen, originating from methane mitigation, could be redirected into useful products for the cow, by combining potent methane mitigating additives with compounds capturing the excess hydrogen.

The new research findings contribute with relevant knowledge on the practical application of potent feed additives to reduce methane emission.

The PhD study was completed at Department of Animal and Veterinary Sciences, Faculty of Technical Sciences, Aarhus University.

This summary was prepared by the PhD student.

Time: Friday, 23 February 2024 at 10:00
Place: 8814-3075, Auditorium, AU Viborg, Aarhus University, Blichers Allé 20, 8830 Tjele. Click here to join the meeting 
Title of PhD thesis: Combining feed additives to mitigate methane and redirect hydrogen in dairy cows
Contact information: Morten Maigaard, e-mail: morten.maigaard@anivet.au.dk, tel.: +45 6067 9084

Members of the assessment committee:
Strategic Marketing and Technology Lead Ruminants Sander van Zijderveld, R&D West-Europe, Cargill, The Netherlands

Ruminant Nutrition Scientist Emilio M. Ungerfeld, Institute of Agricultural Research, Chile

Mogens Vestergaard (chair), Department of Animal and Veterinary Sciences, Aarhus University, Denmark

Main supervisor:
Professor Peter Lund, Department of Animal and Veterinary Sciences, Aarhus University, Denmark

Professor Martin R. Weisbjerg, Department of Animal and Veterinary Sciences, Aarhus University, Denmark.

Language: The PhD dissertation will be defended in English

The defence is public.
The PhD thesis is available for reading at the Graduate School of Technical Sciences/GSTS, Jens Baggesens Vej 53, building 5221, 8200 Aarhus N.


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