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Animal Sciences and Industry

Titgemeyer, Evan

Titgemeyer, Evan

Professor/Research Coordinator 
132 Call Hall
Manhattan KS 66506-1600

Area(s) of Specialization

Amino acid utilization
Ruminant Nutrition



B.S. , Ohio State University, 1984
M.S. , University of Illinois, 1986
Ph.D. , University of Illinois, 1989
Post Doctoral Associate , University of Illinois, 1989 - 1991

Bio Brief

Evan Titgemeyer grew up on a small family farm in northwest Ohio. Following completion of a B.S. degree at The Ohio State University (1984), he completed both M.S. (1986) and Ph.D. (1989) degrees at the University of Illinois. His graduate work was under the direction of Dr. Neal Merchen and focused on determining amino acid requirements of growing cattle; this is an area of research where he is still active. Following post-doctoral training with Dr. George Fahey, Jr. in the area of fiber chemistry, he was hired as a faculty member at Kansas State University in 1992, and he is currently a professor in the Department of Animal Sciences and Industry, with specialization in the area of ruminant nutrition. His current appointment is 70% research and 30% teaching.


Dr. Titgemeyer’s research program focuses on protein and amino acid utilization by beef and dairy cattle. Recent research projects have evaluated various factors that can impact amino acid utilization by growing cattle. Increases in energy supply to growing steers have been found to improve methionine utilization. Research also has demonstrated that the utilization of methionine in some cases appears to be related to the supply of cysteine and/or glycine, but the linkage between cysteine supply and methionine requirements is not as clear in growing cattle as it is in most monogastric species. In contrast to the current beef NRC model, Dr. Titgemeyer’s research has demonstrated that there are differences among the amino acids in terms of how efficiently they are used for growth by cattle. Histidine appears to be used more efficiently than leucine, which is in turn used more efficiently than methionine. No negative effects of excess dietary nitrogen (provided either as amino acids or as non-protein nitrogen) on utilization of methionine, histidine, and leucine have been observed.


Current teaching commitments are primarily in graduate nutrition courses. Currently, Dr. Titgemeyer serves as instructor for Nutritional Physiology (ASI 826), Protein Nutrition (ASI 921, team taught with Dr. Bob Goodband), and Analytical Techniques (ASI 860, 861, 862, and 863). Nutritional Physiology covers basic mechanism related to digestion and absorption of nutrients, with a focus on the small intestinal epithelium. Protein Nutrition discusses both basic and applied aspects of protein and amino acid utilization by livestock species. The Analytical Techniques courses are designed to provide beginning graduate students in nutrition with the basic laboratory skills required to successfully complete their graduate research.

  • Analytical Techniques--Sample Preparation and Beginning Anal [ASI 860]
  • Analytical Techniques--Mineral Analyses [ASI 861]
  • Analytical Techniques--Carbohydrate and Lipid Analyses [ASI 862]
  • Analytical Techniques--Radiosotyope Use [ASI 863]
  • Protein and Amino Acid Utilization in Domestic Livestock [ASI 921]