Animal & Dairy Science: Personnel
Gary M. Hill
Gary M. Hill B.S., Clemson University P.O. Box 748 |
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Description of Research Interests
Research is focused on postweaning beef cattle nutrition and forage management and development of new forage cultivars for Georgia and semi-tropical regions of the world. The program involves expertise and cooperation of USDA-ARS Research Geneticists and Forage Agronomists, teamed to develop high quality, productive, persistent annual and perennial forages for grazing and hay production. Intake and digestion experiments are conducted with fresh forages, hays, and new millets and new corn selections used as silages for beef and dairy cattle.
Additional research is being conducted with feedlot cattle, including feed additive utilization and development, and feeding of vitamins at high levels and different levels of corn oil to affect beef carcass tenderness, quality and fatty acid profile and content, including CLA concentrations. Growth studies, digestibility and intake studies have been conducted using growing beef cattle to evaluate cotton and peanut by-products as feed sources. New grains including pearl millet and pigeon peas have been evaluated through growth, digestion and intake studies as locally grown alternative feeds for beef cattle. In addition to these activities, Dr. Hill teaches ADSC4350 Grazing Animal Production, in the University of Georgia AES B.S. Degree program at Tifton Campus.
Selected Recent Publications
Hill, G. M., W. W. Hanna, and R. N. Gates. 1999. Pearl millet cultivar and seeding method effects on forage quality and performance of grazing heifers. J. Prod. Agric. 12:578-580.
Hill,G. M., P. R. Utley, R. N. Gates, W. W. Hanna, and J. C. Johnson, Jr. 1999. Pearl millet silage for growing beef heifers and steers. J. Prod. Agric. 12:653-658.
Mandebvu P., J. W. West, G. M. Hill, R. N. Gates, R. D. Hatfield, B. G. Mullinix, A. H. Parks, and A. B. Caudle. 1999. Effects of bermudagrass cultivar and stage of maturity on yield, in vitro and in situ, nutrient and cell wall composition, and feed intake and digestion by growing beef steers. J. Anim. Sci. 77:1572-1586.
West, J. W., G. M. Hill, J. M. Fernandez, P. Mandebvu and B. G. Mullinix. 1999. Effects of dietary fiber on intake, milk yield, and digestion by lactating dairy cows during cool or hot, humid weather. J. Dairy Sci. 82:2455-2465.
Martin, Scott A., Marshall N. Streeter, David J. Nisbet, Gary M. Hill and Scott E. Williams. 1999. Effects of DL-malate on ruminal metabolism and performance of cattle fed a high concentrate diet. J. Anim. Sci. 77:1008-1015.
Gates, R. N., G. M. Hill and J. H. Bouton. 1999. Winter feed from 'Georgia 5' tall fescue/warm-season perennial grass Coastal Plain pastures. J. Prod. Agric. 587.
Martin, S. A., J. A. Bertrand, B. Sauls and G. M. Hill. 2000. In situ disappearance of malate from alfalfa and bermudgrass hay. J. Dairy Sci. 83:308-312.
Hill, G. M., R. N. Gates and J. W. West. 2001. Advances in bermudagrass research involving new cultivars for beef and dairy production. Invited Paper. J. Anim. Sci. 79 (E. Suppl.):E48-E58.
Hill, G. M. and R. N. Gates. 2001. Spring regrowth and steer performance on Tifton 85 and Coastal bermudagrass pastures following sod-seeding with ryegrass. Proc. XIX Int. Grassland Congress, Sao Pedro, SP, Brazil. Pp. 823-824 (Refereed proceedings paper). Feb. 11-21, 2001.
O'Connor, M. H., S. A. Martin and G. M. Hill. 2002. Effects of Saccaromyces cerevisiae on the in vitro mixed ruminal microorganism fermentation. Prof. Anim. Sci. 18:358-362.
Hill, G. M. and R. N. Gates. 2003. Improved forage quality of Tifton 85 bermudagrass for pasture and hay production. Proc. Am. Forage and Grassland Council Annual Mtg., Lafayette, LA, April 27-29, 2003.
Hubbard, R. K., G. L. Newton and G. M. Hill. 2004. Water quality and the grazing ruminant. Invited Paper. J. Anim. Sci. 81 (E. Suppl.):E255-E263.