Alexander Nikolov Hristov, Ph.D.

  • Professor of Dairy Nutrition
Alexander Nikolov Hristov, Ph.D.
352 Agricultural Sciences and Industries Building
University Park, PA 16802
Work Phone: 814-863-3669

Areas of Expertise

  • Dairy Nutrition
  • Protein Nutrition of Dairy Cows
  • Rumen Fermentation
  • Nitrogen Utilization
  • Methane Mitigation
  • Environment


  1. Ph.D., Academy of Agricultural Sciences, Sofia, Bulgaria, 1993
  2. B.Sc., Higher Institute of Zooengineering and Veterinary Medicine, Stara Zagora, Bulgaria, 1983

Professional Experience

  • 2008-Present: Associate Professor of Dairy Nutrition, Department of Dairy and Animal Science, Penn State
  • 1999-2008: Associate Professor, Department of Animal and Veterinary Science, University of Idaho
  • 1997-1999: Term Research Scientist II, Agriculture Canada, Lethbridge Research Centre, Canada
  • 1995-1997: Visiting Scientist, Agriculture Canada, Lethbridge Research Centre, Canada
  • 1990-1991, 1993: Visiting Scientist, US Dairy Forage Research Center, Madison, Wisconsin
  • 1983-1997: Research Scientist, Institute of Animal Sciences, Kostinbrod, Bulgaria