Geoff Zanton
Research Animal Scientist Dairy

608-890-0053

1925 Linden Dr. W
Madison, WI 53706

Dr. Zanton joined the Cell Wall Biology and Utilization Research : USDA ARS unit in August of 2014. Dr. Zanton's research specializes in feed protein utilization by the dairy cow.

• Publications

  • (Clicking on the reprint icon will take you to the publication reprint.)
  • Microbial inoculum effects on the rumen epithelial transcriptome and rumen epimural metatranscriptome in calves-(Peer Reviewed Journal)
    
    
  • Production responses of dairy cows to protein and amino acid supplementation-(Proceedings)
    
    
  • Non-linear models of 15N partitioning kinetics in late lactation dairy cows from individually-labeled feed ingredients -(Peer Reviewed Journal)
    
    
  • Evaluation of three collection protocols to determine urine output and urinary urea nitrogen excretion in dairy cows in response to dietary salt supplementation-(Peer Reviewed Journal)
    
    
  • Effects of microbial inoculum on the transcriptome and meta-transcriptome of rumen, reticulum, omasum, and abomasum epithelium in calves-(Abstract Only)
    Fregulia, P., Zanton, G.I., Li, W. 2024. Effects of microbial inoculum on the transcriptome and meta-transcriptome of rumen, reticulum, omasum, and abomasum epithelium in calves. American Dairy Science Association Abstracts. 107 (Supplement 1):28.
    
  • Meta-transcriptome analysis reveals temporal dynamics on the active rumen microbiome in transition Holstein cows-(Abstract Only)
    Fregulia, P., Zanton, G., Li, W. 2024. Meta-transcriptome analysis reveals temporal dynamics on the active rumen microbiome in transition Holstein cows [abstract]. Journal of Dairy Science. 107 (Supplement 1):28.
    
  • In search of a better way: Exploring the impact of enrichment and DNA extraction on long-read sequencing of rumen protozoa.-(Abstract Only)
    McClure, J., Panke-Buisse, K. Lai, E., deHegedus, R.A., Zanton, G., French, E., Smith, T., Suen, G., Bickhart, D. 2024. In search of a better way: Exploring the effects of enrichment and DNA extraction on long-read sequencing of rumen protozoa [abstract]. Journal of Dairy Science. 107 (Supplement 1):268
    
  • Whole blood transcriptome and meta-transcriptome changes in transition cows-(Abstract Only)
    Fregulia, P., Zanton G., Li, W. 2024. Whole blood transcriptome and microbial abundance changes in transition cows [abstract]. International Symposium on Ruminant Physiology. Paper No. 26.
    
  • Rumen microbial inoculation effects on the liver transcriptome and meta-transcriptome in weaned calves-(Abstract Only)
    Fregulia, P., Zanton, G., Li, W. 2024. Rumen microbial inoculation effects on the liver transcriptome and meta-transcriptome in weaned calves [abstract]. International Symposium on Ruminant Physiology. Paper No. 27.
    
  • Crude protein oscillation in diets adequate and deficient in metabolizable protein: effects on nutrient digestibility, nitrogen balance, plasma amino acids, and greenhouse gas emissions -(Peer Reviewed Journal)
    Erickson, M., Reinhardt, L.A., Svaren, L.M., Sullivan, M.L., Zanton, G.I., Wattiaux, M. 2024. Crude protein oscillation in diets adequate and deficient in metabolizable protein: effects on nutrient digestibility, nitrogen balance, plasma amino acids, and greenhouse gas emissions. Journal of Dairy Science. https://doi.org/10.3168/jds.2023-24150.
    
  • Dynamic lactation responses to dietary crude protein oscillation in diets adequate and deficient in metabolizable protein in Holstein cows-(Peer Reviewed Journal)
    
    
  • Characterization of rumen microbiota in lactating Holstein cows fed molasses versus corn grain at two levels of rumen degradable protein -(Peer Reviewed Journal)
    Guduk, E., Hall, M., Zanton, G.I., Steinberger, A.J., Weimer, P.J., Suen, G., Weigel, K.A. 2023. Characterization of rumen microbiota in lactating Holstein cows fed molasses versus corn grain at two levels of rumen degradable protein. Frontiers in Microbiomes. 2. Article 1204988. https://doi.org/10.3389/frmbi.2023.1204988.
    
  • A meta-analysis of liver microbiome in beef and dairy cattle using metatranscriptome sequencing reads-(Other)
    
    
  • Supplemental methionine effects on plasma amino acid concentrations-(Abstract Only)
    
    
  • Effects of level and oscillation of dietary crude protein on ruminal conditions-(Abstract Only)
    
    
  • Microbial inoculum alters the rumen epithelial transcriptome and associated meta-transcriptome in calves-(Abstract Only)
    
    
  • Production performance of Holstein cows at four stages of lactation fed four dietary crude protein concentrations -(Database / Dataset)
    Letelier, P., Zanton, G.I., Wattiaux, M.A. 2022. Production performance of Holstein cows at four stages of lactation fed four dietary crude protein concentrations. Zenodo. 105:9581–9596. https://doi.org/10.3168/jds.2022-22146.
    
  • Production performance of Holstein cows at 4 stages of lactation fed 4 dietary crude protein concentrations -(Peer Reviewed Journal)
    Letelier, P., Zanton, G.I., Wattiaux, M.A. 2022. Production performance of Holstein cows at 4 stages of lactation fed 4 dietary crude protein concentrations. Journal of Dairy Science. 105(12):9581-9596. https://doi.org/10.3168/jds.2022-22146.
    
  • Methane and carbon dioxide production of lactating Holstein cows with different crude protein feeding strategies-(Abstract Only)
    
    
  • Effect of 2-hydroxy-4-(methylthio)butanoate (HMTBa) on milk fat, rumen environment and biohydrogenation, and rumen protozoa in lactating cows fed diets with increased risk for milk fat depression -(Peer Reviewed Journal)
    Baldin, M., Garcia, D., Zanton, G.I., Hao, F., Patterson, A.D., and Harvatine, K.J. 2022. Effect of 2-hydroxy-4-(methylthio)butanoate (HMTBa) on milk fat, rumen environment and biohydrogenation, and rumen protozoa in lactating cows fed diets with increased risk for milk fat depression. Journal of Dairy Science. 105(9):7446–7461. https://doi.org/10.3168/jds.2022-21910
    
  • Supporting data for "Plasma essential amino acid concentration and profile are associated with performance of lactating dairy cows as revealed through meta-analysis and hierarchical clustering" -(Database / Dataset)
    Letelier, P., Zanton, G.I., Dorea, J.R., Wattiaux, M.A. 2022. Supporting data for "Plasma essential amino acid concentration and profile are associated with performance of lactating dairy cows as revealed through meta-analysis and hierarchical clustering". Zenodo. https://doi.org/10.5281/zenodo.6453183.
    
  • Effects of dietary crude protein level and feeding pattern on milk production-(Abstract Only)
    
    
  • Effects of dietary crude protein level and feeding pattern on nitrogen balance and nutrient digestibility-(Abstract Only)
    
    
  • Plasma essential amino acid concentration and profile are associated with performance of lactating dairy cows as revealed through meta-analysis and hierarchical clustering -(Peer Reviewed Journal)
    Letelier, P., Zanton, G.I., Dorea, J.R., Wattiaux, M.A. 2022. Plasma essential amino acid concentration and profile are associated with performance of lactating dairy cows as revealed through meta-analysis and hierarchical clustering. Journal of Dairy Science. 105(6):5044-5061. https://doi.org/10.3168/jds.2021-21028.
    
  • Substitution of cane molasses for corn grain at two levels of degradable protein. I. Lactating cow performance, nutrition model predictions, and potential basis for butterfat and intake responses -(Peer Reviewed Journal)
    Hall, M., Zanton, G.I. 2022. Substitution of cane molasses for corn grain at two levels of degradable protein. I. Lactating cow performance, nutrition model predictions, and potential basis for butterfat and intake responses. Journal of Dairy Science. 105(5):3939-3953. https://doi.org/10.3168/jds.2021-21241.
    
  • Substitution of molasses for corn grain at two levels of degradable protein. II. Effects on ruminal fermentation, digestion, and nitrogen metabolism -(Peer Reviewed Journal)
    Zanton, G.I., Hall, M. 2022. Substitution of molasses for corn grain at two levels of degradable protein. II. Effects on ruminal fermentation, digestion, and nitrogen metabolism. Journal of Dairy Science. 105(5):3954-3968. https://doi.org/10.3168/jds.2021-21240.
    
  • The rumen liquid meta-transcriptome of post-weaned dairy calves differed by pre-weaning ruminal administration of differentially-enriched, rumen-derived inocula -(Peer Reviewed Journal)
    Park, T., Cersosimo, L.M., Radloff, W.J., Zanton, G.I., Li, W. 2022. The rumen liquid meta-transcriptome of post-weaned dairy calves differed by pre-weaning ruminal administration of differentially-enriched, rumen-derived inocula. Animal Microbiome. 4. Article 4. https://doi.org/10.1186/s42523-021-00142-z.
    
  • Pre-weaning ruminal administration of differentially-enriched, rumen-derived inocula shaped rumen bacterial communities and co-occurrence networks of post-weaned dairy calves -(Peer Reviewed Journal)
    Park, T., Cersosimo, L.M., Li, W., Radloff, W.J., Zanton, G.I. 2021. Pre-weaning ruminal administration of differentially-enriched, rumen-derived inocula shaped rumen bacterial communities and co-occurrence networks of post-weaned dairy calves. Frontiers in Microbiology. https://doi.org/10.3389/fmicb.2021.625488.
    
  • Relative availability of metabolizable methionine from two sources of ruminally protected methionine fed to lactating dairy cattle -(Peer Reviewed Journal)
    Ardalan, M., Vargas-Rodriguez, C., Zanton, G.I., Vazquez-Anon, M., Bradford, B., Tigemeyer, E. 2020. Relative availability of metabolizable methionine from two sources of ruminally protected methionine fed to lactating dairy cattle. Journal of Dairy Science. 104(2):1811-1822. https://doi.org/10.3168/jds.2020-19042.
    
  • The effects of 2-hydroxy-4-methylthio-butanoic acid supplementation on the rumen microbial population and duodenal flow of microbial nitrogen -(Peer Reviewed Journal)
    Jenkins, C., Fernando, S., Anderson, C., Aluthge, N., Castillo-Lopez, E., Zanton, G.I., Kononoff, P. 2020. The effects of 2-hydroxy-4-methylthio-butanoic acid supplementation on the rumen microbial population and duodenal flow of microbial nitrogen. Journal of Dairy Science. 103(11):10161-10174. https://doi.org/10.3168/jds.2019-17664.
    
  • Physiological effects of starter-induced ruminal acidosis in calves before, during, and after weaning -(Peer Reviewed Journal)
    Gelsinger, S.L., Coblentz, W.K., Zanton, G.I., Ogden, R.K., Akins, M.S. 2020. Physiological effects of starter-induced ruminal acidosis in calves before, during, and after weaning. Journal of Dairy Science. 103(3):2762-2772. https://doi.org/10.3168/jds.2019-17494.
    
  • Microbial inoculum composition and pre-weaned dairy calf age alter the developing rumen microbial environment -(Peer Reviewed Journal)
    Cersosimo, L.M., Radloff, W.J., Zanton, G.I. 2019. Microbial inoculum composition and pre-weaned dairy calf age alter the developing rumen microbial environment. Frontiers in Microbiology. https://doi.org/10.3389/fmicb.2019.01651.
    
  • Effect of experimental design on responses to two levels of metabolizable protein in multiparous dairy cows -(Peer Reviewed Journal)
    Zanton, G.I. 2019. Effect of experimental design on responses to two levels of metabolizable protein in multiparous dairy cows. Journal of Dairy Science. https://doi.org/10.3168/jds.2018-15730.
    
  • Ruminal in situ disappearance and whole-tract digestion of starter feeds in calves before, during, and after weaning -(Peer Reviewed Journal)
    Gelsinger, S.L., Coblentz, W.K., Zanton, G.I., Ogden, R.K., Akins, M.S. 2019. Ruminal in situ disappearance and whole-tract digestion of starter feeds in calves before, during, and after weaning. Journal of Dairy Science. 102(3):2196-2206. https://doi.org/10.3168/jds.2018-15551.
    
  • Microbial inocula alter the ruminal environment and animal performance of post-weaned dairy calves-(Abstract Only)
    Cerosimo, L.M., Radloff, W.J., Zanton, G.I. 2018. Microbial inocula alter the ruminal environment and animal performance of post-weaned dairy calves. J.Dairy Sci. 101(Suppl. 2): i.
    
  • Ruminal and whole-tract diet digestion in calves before, during, and after weaning-(Abstract Only)
    Gelsinger, S.L., Coblentz, W.K., Zanton, G.I., Ogden, R.K. 2018. Ruminal and whole-tract diet digestion in calves before, during, and after weaning. Journal of Dairy Science. 101 (suppl. 2):263.
    
  • Effects of molasses and corn grain at 2 levels of ruminally degradable protein on lactating cow ruminal fermentation and rumen content mass-(Abstract Only)
    Zanton, G.I., Hall, M. 2018. Effects of molasses and corn grain at 2 levels of ruminally degradable protein on lactating cow ruminal fermentation and rumen content mass. Journal of Dairy Science. 101(Suppl. 2): 94.
    
  • Physiological effects of low rumen pH in calves before, during and after weaning-(Abstract Only)
    Gelsinger, S.L., Zanton, G.I. 2018. Physiological effects of low rumen pH in calves before, during and after weaning. Journal of Dairy Science. 101(Suppl. 2): 335.
    
  • Effects of microbial inoculum composition on rumen microbial ecology of dairy calves-(Abstract Only)
    Cerosimo, L.M., Radloff, W.J., Zanton, G.I. 2018. Effects of microbial inoculum composition on rumen microbial ecology of dairy calves. Journal of Dairy Science. 101(Suppl. 2): 310.
    
  • Effect of 2-hydroxy-4-(methylthio)butanoate (HMTBa) on risk of biohydrogenation-induced milk fat depression-(Peer Reviewed Journal)
    Baldin, M., Zanton, G.I., Harvatine, K.J. 2017. Effect of 2-hydroxy-4-(methylthio)butanoate (HMTBa) on risk of biohydrogenation-induced milk fat depression. Journal of Dairy Science. 101: 376-385.
    
  • Effects of replacing soybean meal with canola meal or treated canola meal on ruminal digestion, fermentation pattern, omasal nutrient flow, and performance in lactating dairy cows-(Peer Reviewed Journal)
    Paula, E.M., Broderick, G.A., Danes, M.A., Lobos, N.E., Zanton, G.I., Faciola, A.P. 2018. Effects of replacing soybean meal with canola meal or treated canola meal on ruminal digestion, fermentation pattern, omasal nutrient flow, and performance in lactating dairy cows. Journal of Dairy Science. 101:328-339.
    
  • Invited review: 100 years of dairy heifer research-(Review Article)
    Heinrichs, A.J., Jones, C.M., Lascano, G.J., Zanton, G.I. 2017. Invited review: 100 years of dairy heifer research. Journal of Dairy Science. 100: 10173-10188.
    
  • Urinary purine derivatives as a tool to estimate dry matter intake in cattle: a meta-analysis-(Peer Reviewed Journal)
    Dorea, J.R., Danes, M.A., Zanton, G.I., Armentano, L.E. 2017. Urinary purine derivatives as a tool to estimate dry matter intake in cattle: a meta-analysis. Journal of Dairy Science. 100: 8977-8994.
    
  • Effects of experimental design and protein substitution strategy on production responses to feeding different levels of protein to primiparous dairy cows-(Abstract Only)
    Zanton, G.I. 2017. Effects of experimental design and protein substitution strategy on production responses to feeding different levels of protein to primiparous dairy cows [abstract]. Journal of Dairy Science. 100(suppl 2):110.
    
  • Feeding rumen-protected methionine pre- and postpartum increases milk protein content and yield in early lactation-(Abstract Only)
    Toledo, M.Z., Gennari, R.S., Barletta, R.V., Monteiro, Jr., P.L., Gamarra, C.A., Prata, A.B., Dorea, J.R., Jones, A., Luchini, D., Zanton, G.I., Van Amburgh, M.E., Giordano, J.O., Shaver, R., Wiltbank, M.C. 2017. Feeding rumen-protected methionine pre- and postpartum increases milk protein content and yield in early lactation [abstract]. Journal of Dairy Science. 100(suppl 2):116.
    
  • Short communication: Glucose kinetics in dairy heifers limit-fed a low- or high-forage ration at four levels of nitrogen intake-(Peer Reviewed Journal)
    Zanton, G.I., Heinrichs, A.J. 2017. Short communication: Glucose kinetics in dairy heifers limit-fed a low- or high-forage ration at four levels of nitrogen intake. Journal of Dairy Science. 100:3718-3724.
    
  • Opportunities and challenges of applying recent advances in dairy cattle protein nutrition to beef cattle nutrition-(Proceedings)
    Zanton, G.I. 2017. Opportunities and challenges of applying recent advances in dairy cattle protein nutrition to beef cattle nutrition. In: Proceedings of American Society of Animal Science Southern Section Meeting, February 4-7, 2017, Franklin, Tennessee. p. 59-60.
    
  • Protein and amino acid nutrition-(Book / Chapter)
    Zanton, G.I. 2017. Protein and amino acid nutrition. In: Beede, D.K., editor. Large Dairy Herd Management. 3rd edition. Champaign, IL: American Dairy Science Association. p. 625-637.
    
  • Balancing rations to optimize milk components-(Proceedings)
    Zanton, G.I. 2016. Balancing rations to optimize milk components. In: Proceedings of the Penn State Dairy Cattle Nutrition Workshop, November 9-10, 2016, Grantville, Pennsylvania. p. 49-54.
    
  • Amino acid nutrition beyond methionine and lysine for milk protein-(Proceedings)
    Zanton, G.I. 2016. Amino acid nutrition beyond methionine and lysine for milk protein. In: Proceedings of the Penn State Dairy Cattle Nutrition Workshop November 9-10, 2016, Grantville, Pennsylvania. p. 105-112.
    
  • Effect of experimental design on production responses in high-producing dairy cows fed two levels of metabolizable protein-(Abstract Only)
    Zanton, G.I. 2016. Effect of experimental design on production responses in high-producing dairy cows fed two levels of metabolizable protein [abstract]. Annual Meeting of American Dairy Science Association, July 19-23, 2016, Salt Lake City, Utah.
    
  • Effects of replacing soybean meal with canola meal or treated canola meal on nitrogen metabolism and total tract digestibility in lactating dairy cows-(Abstract Only)
    Paula, E.M., Danes, M.A., Lobos, N.E., Zanton, G.I., Broderick, G.A., Faciola, A.P. 2016. Effects of replacing soybean meal with canola meal or treated canola meal on nitrogen metabolism and total tract digestibility in lactating dairy cows [abstract]. Annual Meeting of American Dairy Science Association, July 19-23, 2016, Salt Lake City, Utah.
    
  • Effects of replacing soybean meal with canola meal or treated canola meal on ruminal digestion, and omasal nutrient flow in lactating dairy cows-(Abstract Only)
    Paula, E.M., Danes, M.A., Lobos, N.E., Drago, F.L., Zanton, G.I., Broderick, G., Faciola, A.P. 2016. Effects of replacing soybean meal with canola meal or treated canola meal on ruminal digestion, and omasal nutrient flow in lactating dairy cows [abstract]. Annual Meeting of American Dairy Science Association, July 19-23, 2016, Salt Lake City, Utah.
    
  • Analysis of production responses to changing crude protein levels in lactating dairy cow diets when evaluated in continuous or change-over experimental designs -(Peer Reviewed Journal)
    Zanton, G.I. 2016. Analysis of production responses to changing crude protein levels in lactating dairy cow diets when evaluated in continuous or change-over experimental designs. Journal of Dairy Science. 99:4398-4410.
    
  • Efficiency and rumen responses in younger and older Holstein heifers limit-fed diets of differing energy density -(Peer Reviewed Journal)
    Zanton, G.I., Heinrichs, A.J. 2016. Efficiency and rumen responses in younger and older Holstein heifers limit-fed diets of differing energy density. Journal of Dairy Science. 99:2825-2836.
    
  • Effects of replacing soybean meal with canola meal or treated canola meal on performance of lactating dairy cows-(Abstract Only)
    Paula, E.M., Danes, M.A., Lobos, N.E., Zanton, G.I., Broderick, G.A., Faciola, A.P. 2015. Effects of replacing soybean meal with canola meal or treated canola meal on performance of lactating dairy cows [abstract]. Journal of Dairy Science. 98(suppl 2):387.
    
  • Time required for adaptation of protein metabolism-(Abstract Only)
    Zanton, G.I. 2015. Time required for adaptation of protein metabolism [abstract]. Journal of Dairy Science. 98(suppl 2):312.
    

• Projects

  Assembly and Annotation of Rumen Protist Genomes to Determine their Metabolic Contribution and Environmental Presence Cooperative Agreement (A)   Accession Number:439748

  Developing Strategies to Improve Dairy Cow Performance and Nutrient Use Efficiency with Nutrition, Genetics, and Microbiology In-House Appropriated (D)   Accession Number:442971

  Assembly and Annotation of Rumen Protist Genomes to Determine Their Metabolic Contribution and Environmental Presence Interagency Reimbursable Agreement (I)   Accession Number:439531

  Utilizing the University of Wisconsin Institutional Animal Care and Use Committee Non-Funded Cooperative Agreement (N)   Accession Number:440145

  Institutional Biological Safety Committee (IBC) Agreement - University of Wisconsin Madison Non-Funded Cooperative Agreement (N)   Accession Number:441643

• ARS News Articles

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