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Dr. John K. Bernard is a Professor in the Department of Animal and Dairy Science at the University of Georgia. He received his B.S. (1977) from the University of Tennessee and M.S. (1984) and Ph.D. (1987) degrees from the University of Georgia. Upon graduation he accepted a faculty position at the University of Tennessee at Martin with responsibilities in teaching and research. In 1984, his appointment was modified to research and extension with the University of Tennessee. He joined the faculty at the University of Georgia in July, 1998 with responsibilities in dairy nutrition and management research and extension and is located at the UGA Tifton Campus.
Dr. Bernard’s research has focused on nutrition and management of dairy cattle with the objective of improving efficiency, cow comfort, and profitability. His research has examined the utilization of southern forages, byproduct feeds, specialty fats, protein supplements, and feed additive to meet the nutritional requirements of high producing dairy cows. He has also worked to identify better methods for reducing heat stress and improving cow comfort in hot, humid climates. To support his applied research program, he has secured over $3.6 million in grants and gifts. Dr. Bernard has published 89 manuscripts, 5 book chapters, 68 bulletins and research reports, and 119 abstracts from his research to date. He has actively collaborated with researchers in Thailand, Indonesia, and the Philippines to improve production in these tropical areas and train graduate students and young faculty. As part of his extension duties, he has published 189 popular press articles and provided many county, state, and regional talks. He works cooperatively with faculty from the University of Florida to coordinate the UGA-UFL Corn Silage and Forage Field Day, Dairy Education Seminars at Sunbelt Expo, and other joint extension events.
Dr. Bernard has served as Research, Extension, and Instruction Coordinator for the ADS at the Tifton campus since 2008 with responsibilities for daily operations, budget, and staff. He is a member of American Dairy Science Association (ADSA) and American Registry of Professional Animal Scientists (ARPAS) and was appointed as a Diplomat in the American College of Animal Sciences, Animal Nutrition Discipline of ARPAS in 2011. He currently serves as the Past President of ARPAS and has served as a director and officer of the Southern Branch of ADSA, director of the production division of ADSA and senior advisor to the Dairy Calf & Heifer Association. Dr. Bernard is the recipient of the Cady Award from Dairy Calf & Heifer Association in 2013, Pioneer Hi-Bred Forage Award from ADSA in 2011, and the Honor Award by the Southern Branch of ADSA in 2006.
B.S., University of Tennessee
M.S., University of Georgia
Ph.D., University of Georgia
Description of Research and Extension Interests
My research program involved improving utilization of nutrients provided by forages and by-product feeds in dairy rations. Current research projects include effective utilization of winter annual and perennial grass for lactating dairy cows, enhancing digestibility and utilization of whole cottonseed and other by-product feeds, protein and amino acid metabolism by lactating dairy cows, and reduction of heat stress through environmental and nutritional modification.
The focus of my extension program is on improving dairy producer returns though the use of good management practices and decision making. Programming is provided in the areas of forage production and management, nutrition, replacement heifer development, and cow comfort.
Selected Recent Publications
Bernard, J. K. 2018. Invited Review: Dairy Extension programs in the southern region: Finding novel ways to meet the needs of our producers. Applied Anim. Sci. 35:1-7. https://doi.org.10.15232/aas/2018-01781.
*Arangsri, M., V. Pattarajinda, M. Duangjinda, J. Mungkalasiri, W. Angthong and J.K. Bernard. 2018. Effect of fermented total mixed rations differing in methane production potential on milk production, methane emission, ruminal fermentation, digestibility and performance of lactating dairy cows in Thailand. Anim. Nutr. Feed Tech. 18: 441-450. https://doi.10.5958/0974181X.2018. 00041.0
*Intanoo, I., M. B. Kongkeitkajorn, V. Pattarajinda, W. Suriyasathaporn, Y. Phasuk and J. K. Bernard. 2018. Isolation and screening of aflatoxin degrading yeast and bacteria from ruminal fluid to reduce aflatoxin B1 contamination in dairy cattle feed. J. Appl. Microbiol. 1125:1603-1613. https://doi10.1111/jam.14060
*Diehl, A. L., J. K. Bernard, S. Tao, T. N. Smith, D. J. Kirk, D. J. McLean and J. D. Chapman. 2018. Effect of varying prepartum DCAD and calcium concentration on postpartum mineral and metabolite status and performance of multiparous cows. J. Dairy Sci.101:9915-9925. https://doi.
*Diehl, A. L., J. K. Bernard, S. Tao, T. N. Smith, T. Marins, D. J. Kirk, D. J. McLean and J. D. Chapman. 2018. Short Communications: Blood mineral and gas concentrations of calves born to cows fed prepartum diets differing in dietary DCAD and calcium concentration. J. Dairy Sci.101:9048-9051. https://doi.org/10.3168/jds.2018-14829
*Tao, S., M. Orellana, X. Weng, T. Marins, G. Dahl, and J. K. Bernard. 2018. Symposium review: The influences of heat stress on bovine mammary gland function. J. Dairy Sci. 101:5642-5654. https://doi.org/10.3168/jds.2017-13727
*Weng, X., A. P. A. Monteiro, J. Guo, C. Li, J. K. Bernard, D. T. Tomlinson, J. M. DeFrain, S. Wohlgemuth, and S. Tao. 2018. Effects of heat stress and dietary zinc source on mammary epithelial integrity of lactating dairy cows. J. Dairy Sci. 101:2617-2630. https://doi.org/10.3168/jds.2017-13484
de Souza, R. A., R. J. Tempelman, M. S. Allen, W. Weiss, J. K. Bernard, M. J. VandeHaar. 2018. Predicting nutrient digestibility in high-producing lactating dairy cows. J. Dairy Sci. 101:1123-1135. https://doi.org/10.3168/jds.2017-13344
*Weng, X., A. P. A. Monteiro, J. Guo, B. M. Ahmed, J. K. Bernard, D. J. Tomlinson, J. M. DeFrain, G. E. Dahl, and S. Tao. 2017. Short Communication: Repeated mammary tissue collections during lactation have no impact on cow performance. J. Dairy Sci. 100:8422-8425. https://doi.org/10.3168/jds.2017-12889.
*Arangsri, M, V. Pattarajinda, M. Duangjinda, J. Mungkalasiri, W. Angthong, and J. K. Bernard. 2017. Impact of fermented total mixed rations on intake, VFA and methane production of dairy heifers. Indian J. Anim. Res. doi:10.18805/ijar.B-749.
Cortese, V. S., A. Woolums, D. J. Hurley, R. Berghaus, J. K. Bernard, T. H. Short. 2017. Comparison of interferon and bovine herpesvirus-1-specific IgA levels in nasal secretions of dairy cattle administered an intranasal modified live viral vaccine prior to calving or on the day of calving. Vet. Imm. Immunopath 187:35-41.
*Bernard, J. K., and S. Tao. 2017. Effect of brachytic dwarf forage sorghum or corn silage harvested in the summer or fall and supplemented with soybean meal or mechanically pressed cottonseed meal on performance of lactating dairy cows. Prof. Anim. Sci. 33:342-348. http://dx.doi.org/10.15232/pas.2016-01603.
*Monteiro, A. P. A., J. K. Bernard, J-R. Guo, X-S. Weng, S. Emanuele, R. Davis, G. E. Dahl, and S. Tao. 2017. Impact of feeding betaine-containing liquid supplement to transition dairy cows. J. Dairy Sci. 100:1063-1071. https://doi.org/10.3168/jds.2016-11452
*Guo, J-R, A. P. A. Monteiro, X-S. Weng, B. M. Ahmen, J. Laporta, M. J. Hayen, G. E. Dahl, J. K. Bernard, and S. Tao. 2016. Short Communication: Impact of maternal heat stress in late gestation on blood hormones and metabolites of newborn. J. Dairy Sci. 99:6804–6807. http://dx.doi.org/10.3168/jds.2016-11088.
*Moran, J. B., J.K. Bernard, and A. Young. 2016. Prioritising improvements to traditional management practices on small holder dairy farms in the humid tropics of Asia. Inter. J. Agric. Biosci. 5:73-81.
*Monteiro, A. P. A., J-R. Guo, X-S. Weng, B. M. Ahmed, M. J. Hayen, G. E. Dahl, J. K. Bernard, and S. Tao. 2016. Effect of maternal heat stress during the dry period on growth and metabolism of calves. J. Dairy Sci.99:3896-3907. http://dx.doi.org/10.3168/jds.2015-10699.
*Maki, C. R., A. P. A. Monteiro, S. E. Elmore, S. Tao, J. K. Bernard, R. B. Harvey, and A. A. Romoser, and T. D. Phillips. 2016. Calcium montmorillonite clay reduces alfatoxin in milk and does not interfere with milk quality and composition. Anim. Feed Sci. Technol. 214:130-135. http://dx.doi.org/10.1016/j.anifeedsci.2016.02.014.
*Bernard, J. K., and S. Tao. 2015. Production response of lactating dairy cows to brachytic forage sorghum silage compared with corn silage from first or second harvest. J. Dairy Sci. 98:8994-9000. http://dx.doi.org/10.3168/jds.2015-9716.
*Bernard, J. K. 2015. Milk yield and composition of lactating dairy cows fed diets supplemented with a probiotic extract. Prof. Anim. Sci.31:354-358. http://dx.doi.org/10.15232/pas.2015-1404.
*Wu, Z., J. K. Bernard, and S. J. Taylor. 2015. Effect of feeding calcareous marine algae prepartum or postpartum on production on metabolic parameters. J. Dairy Sci. 98:4629-4639. http://dx.doi.org/10.3168/jds.2014-8711.