-
Leadership Meet the Administrative Team Departments and Units Aute et fugiat ad est cupidatat esse laborum dolor ex anim anim cillum cillum exercitation culpa. Our Experts Aute et fugiat ad est cupidatat esse laborum dolor ex anim anim cillum cillum exercitation culpa.State Administration Get contact information for Extension administrative personnel by operational area and their respective support personnel. Area Extension Directors Get contact information for the Area Extension Directors (AEDs) County Extension Personnel Aute et fugiat ad est cupidatat esse laborum dolor ex anim anim cillum cillum exercitation culpa.
David Harmon
Regular Faculty
Associated Departments
Scholars@UK
Gastrointestinal development and tight junctions of preweaned calves supplemented with sodium butyrate in the starter mixture and whole milk
Zhang, Z., Wu, D., Li, X., Jia, Y., Qi, J., Harmon, D. L. & Xu, M., Jun 2025, In: Tropical Animal Health and Production. 57, 5, 234.Research output: Contribution to journal › Article › peer-review
In vitro antimicrobial efficacy of Cannabis sativa L. (hemp) crude oil extract on Fusobacterium necrophorum of bovine origin
Lakes, J. E., Altman, A. W., Berhow, M. A., Kagan, I. A., Nagaraja, T. G., Harmon, D. L. & Flythe, M. D., Jun 2025, In: Anaerobe. 93, 102960.Research output: Contribution to journal › Article › peer-review
Nutrient net absorption across the portal-drained viscera of forage-fed beef steers: Quantitative assessment and application to a nutritional prediction model
El-Kadi, S. W., McLeod, K. R., Elam, N. A., Kitts, S. E., Taylor, C. C., Harmon, D. L., Bequette, B. J. & Vanzant, E. S., Sep 2008, In: Journal of Animal Science. 86, 9, p. 2277-2287 11 p.Research output: Contribution to journal › Article › peer-review
Whole stillage inclusion level influences in vitro fiber digestibility and ruminal fermentation of tall fescue hay
Ajayi, H. J., Davis, B. E., Lehmkuhler, J. W., Harmon, D. L., Jiang, Y. & Trotta, R. J., 2025, In: Journal of Animal Science. 103, skaf006.Research output: Contribution to journal › Article › peer-review
Influence of flake density and starch retrogradation on in vitro gas production kinetics, digestibility, and ruminal fermentation characteristics of steam-flaked corn
Trotta, R. J., Kreikemeier, K. K. & Harmon, D. L., 2024, In: Journal of Animal Science. 102, skae308.Research output: Contribution to journal › Article › peer-review
Influence of postruminal casein infusion and exogenous glucagon-like peptide 2 administration on the jejunal mucosal transcriptome in cattle
Trotta, R. J., Swanson, K. C., Klotz, J. L. & Harmon, D. L., Aug 1 2024, In: PLoS ONE. 19, 8, e0308983.Research output: Contribution to journal › Article › peer-review
Influence of rearing method on the behaviour and welfare of Assaf lambs during the neonatal period
Simeonov, M., Harmon, D. L. & Stoycheva, I., Sep 2024, In: Indian Journal of Animal Sciences. 94, 9, p. 797-802 6 p.Research output: Contribution to journal › Article › peer-review
Effects of a Proprietary Kelp Blend Product on Enteric Methane Production and Tissue Residues in Cattle
Altman, A., Vanzant, E., Davis, S., Harmon, D. & McLeod, K. R., Aug 2024, In: Animals. 14, 16, 2411.Research output: Contribution to journal › Article › peer-review
Levodopa attenuates the feed intake reduction caused by ergot alkaloids in cattle
Valente, E. E. L., Klotz, J. L., Markmann, R. C., Trotta, R. J., Edwards, J. L., May, J. B. & Harmon, D. L., 2024, In: Journal of Animal Science. 102, skae078.Research output: Contribution to journal › Article › peer-review
Impact of endophyte-infected tall fescue seed consumption on endocrine changes associated with intake regulation and post-absorptive metabolism in growing steers
King, M. E., Herzing, H. M., McLeod, K. R., Klotz, J. L., Foote, A. P., Edwards, J. L. & Harmon, D. L., Oct 2024, In: Domestic Animal Endocrinology. 89, 106873.Research output: Contribution to journal › Article › peer-review
Serotonin receptor-mediated vasorelaxation occurs primarily through 5-HT4 activation in bovine lateral saphenous vein
Trotta, R. J., Harmon, D. L. & Klotz, J. L., Jul 2024, In: Physiological Reports. 12, 13, e16128.Research output: Contribution to journal › Article › peer-review
Nutritional and Physiological Constraints Contributing to Limitations in Small Intestinal Starch Digestion and Glucose Absorption in Ruminants
Trotta, R. J., Harmon, D. L., Matthews, J. C. & Swanson, K. C., Mar 2022, In: Ruminants. 2, 1, p. 1-26 26 p.Research output: Contribution to journal › Review article › peer-review
5-hydroxytryphophan mitigates ergot alkaloid-induced suppression of serotonin and feed intake in cattle
Valente, E. E. L., Klotz, J. L., Markmann, R. C., Edwards, J. L. & Harmon, D. L., 2024, In: Journal of Animal Science. 102, skae083.Research output: Contribution to journal › Article › peer-review
Influence of α-linked glucose on sodium-glucose cotransport activity along the small intestine in cattle
Bauer, M. L., Harmon, D. L., Bohnert, D. W., Branco, A. F. & Huntington, G. B., Jul 2001, In: Journal of Animal Science. 79, 7, p. 1917-1924 8 p.Research output: Contribution to journal › Article › peer-review
Review: Utilizing industrial hemp (Cannabis sativa L.) by-products in livestock rations
Altman, A. W., Kent-Dennis, C., Klotz, J. L., McLeod, K., Vanzant, E. & Harmon, D. L., Jan 2024, In: Animal Feed Science and Technology. 307, 115850.Research output: Contribution to journal › Review article › peer-review
Exploring the Role of G Protein Expression in Sodium Butyrate-Enhanced Pancreas Development of Dairy Calves: A Proteomic Perspective
Wu, D., Zhang, Z., Wang, X., Harmon, D. L., Jia, Y., Qi, J., Li, X., Jia, H. & Xu, M., Mar 20 2024, In: Journal of Agricultural and Food Chemistry. 72, 11, p. 5645-5658 14 p.Research output: Contribution to journal › Article › peer-review
Grand Challenge in Animal Nutrition
Harmon, D. L., 2020, In: Frontiers in Animal Science. 1, 621638.Research output: Contribution to journal › Article › peer-review
Postruminal Casein Infusion and Exogenous Glucagon-Like Peptide 2 Administration Differentially Stimulate Pancreatic α-Amylase and Small Intestinal α-Glucosidase Activity in Cattle
Trotta, R. J., Swanson, K. C., Klotz, J. L. & Harmon, D. L., Oct 2023, In: Journal of Nutrition. 153, 10, p. 2854-2867 14 p.Research output: Contribution to journal › Article › peer-review
Influence of Body Condition on Milk Production and Metabolic Profile in Assaf Sheep
Simeonov, M., Harmon, D. L. & Stoicheva, I., 2023, In: Iranian Journal of Applied Animal Science. 13, 3, p. 475-483 9 p.Research output: Contribution to journal › Article › peer-review
Influence of Anti-Coccidial Compounds and Phytogenic Saponin Extracts on In Vitro and In Vivo Ruminal Fermentation and Methane Production of Cattle
Trotta, R. J., Kreikemeier, K. K., Foote, S., McLeod, K. R. & Harmon, D. L., Jul 2023, In: Animals. 13, 14, 2308.Research output: Contribution to journal › Article › peer-review
ARS/FAPRU: Improving Sustainability of Forage-Based Production Systems
Matthews, J. (PI), Anderson, L. (CoI), Bridges, P. (CoI), Ely, D. (CoI), Haan, N. (CoI), Harmon, D. (CoI), Hunt, A. (CoI), Ji, H. (CoI), McCulley, R. (CoI), McLeod, K. (CoI), Phillips, T. (CoI), Rentfrow, G. (CoI), Schardl, C. (CoI), Smith, S. (CoI), Suman, S. (CoI), Teutsch, C. (CoI), VanValin, K. (CoI) & Zhu, H. (CoI)
5/1/23 → 4/30/26
Project: Research project
ARS/FAPRU: Harmon - Improving Sustainability of Forage-Based Production Systems
Harmon, D. (PI)
5/1/23 → 4/30/26
Project: Research project
Potential Amelioration Of Fescue Toxicosis By 5-Hydroxytryptophan In Beef Cattle
Trotta, R. (PI) & Harmon, D. (CoI)
National Institute of Food and Agriculture
8/1/24 → 7/31/26
Project: Research project
Mitigation of Sustained Ergot Alkaloid-Induced Vasoconstriction in Beef Cattle by Serotonin
Trotta, R. (PI) & Harmon, D. (CoI)
National Institute of Food and Agriculture
5/24/24 → 5/24/24
Project: Research project
The Agronomy of Hemp and Its Uses in Forage-Animal Agriculture
Harmon, D. (PI), Ely, D. (CoI), McLeod, K. (CoI) & Vanzant, E. (CoI)
8/1/21 → 7/31/26
Project: Research project
The Agronomy of Hemp and Its Uses in Forage-Animal Agriculture
Matthews, J. (PI), Adam, E. (CoI), Adams, A. (CoI), Ely, D. (CoI), Gauthier, N. (CoI), Harmon, D. (CoI), Hunt, A. (CoI), Ji, H. (CoI), Kawashima, T. (CoI), Lawrence, L. (CoI), Mark, T. (CoI), McCulley, R. (CoI), McLeod, K. (CoI), Moe, L. (CoI), Page, A. (CoI), Pearce, R. (CoI), Schendel, R. (CoI), Urschel, K. (CoI), Vanzant, E. (CoI), Villanueva, R. (CoI) & Xiong, Y. (CoI)
8/1/21 → 7/31/26
Project: Research project
Effects of Exogenous Glucoamylase on Small Intestine Starch Disappearance on Cattle
Harmon, D. (PI)
4/1/23 → 3/31/25
Project: Research project
Assessment of Available Literature and Gap Analysis on the Use of Industrial Hemp as a Livestock Feed
Harmon, D. (PI)
Foundation for Food and Agriculture Research
11/1/22 → 10/31/23
Project: Research project
Impact of Feeding Foods Containing Industrial Hemp on Health and Well-Being of Dogs
Harmon, D. (PI) & McLeod, K. (CoI)
2/27/18 → 8/26/21
Project: Research project
Services Agreement - Rumen Cannulation of Cows
Harmon, D. (PI)
4/5/18 → 12/31/18
Project: Research project
Student Support Agreement - Amanda Pesqueira
Harmon, D. (PI)
8/1/16 → 5/31/22
Project: Research project
Establishment of GLP quality systems for UK Animal Science
Harmon, D. (PI)
7/1/15 → 2/6/17
Project: Research project
Fatty acid profile in ruminal content and blood plasma of finishing beef cattle, supplemented with different levels of marine algae.
Harmon, D. (PI)
10/1/14 → 9/30/17
Project: Research project
Development of In Vitro Rumen Fermentation Procedures for Determination of PNU-0048164 Bioequivalence
Harmon, D. (PI)
4/15/13 → 6/30/19
Project: Research project
Student Sponsorship Agreement for Amanda Pesqueira
Harmon, D. (PI)
1/1/14 → 12/31/16
Project: Research project
Use of In Vitro Fermentation as a Comparative Measure of Ionophore Function
Harmon, D. (PI)
4/15/13 → 6/30/19
Project: Research project
Effects of basal diet, DIP source and level on the growth performance of feedlot cattle
Harmon, D. (PI)
4/2/12 → 6/27/14
Project: Research project
LAD and Monensin in Vitro VFA Study
Harmon, D. (PI) & McLeod, K. (CoI)
9/20/10 → 12/31/13
Project: Research project