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2:00 PM


The relationship between negative energy balance and mastitis in dairy cattle during early lactation. K. M. Moyes*1, T. Larsen2, N. C. Friggens2, J. K. Drackley1, and K. L. Ingvartsen2, 1University of Illinois, Urbana, 2University of Aarhus, Tjele, Denmark.

2:15 PM


The use of the Rumensin Premix in dairy cows: factors influencing its effects on milk production and milk composition. J. Dubuc*1, D. DuTremblay1, M. Brodeur1, R. Bagg2, P. Dick2, J. Baril2, and L. DesCoteaux1, 1Universite de Montreal, Saint- Hyacinthe, Quebec, Canada, 2Elanco Animal Health, Guelph, Ontario, Canada.

2:30 PM


The expression of genes regulating lipolysis in the adipose tissue of pregnant and lactating dairy cattle. J. M. Sumner* and J. P. McNamara, Washington State University, Pullman.

2:45 PM


Feeding a whey protein gel to prevent rumen hydrogenation of unsaturated fatty acids and increase the n3 and n6 fatty acid content of goat milk. J. A. Weinstein*, E. J. DePeters, M. Rosenberg, S. J. Taylor, and A. Aljadeff, University of California, Davis.

3:00 PM


Effect of time of AI and supplemental estradiol on pregnancy rates of lactating dairy cows. J. Hillegass*, J. E. P. Santos, F. S. Lima, M. F. Sheley, and M. F. S. Filho, University of California, Tulare.

3:15 PM


Interactions of unsaturated fat or coconut oil with Rumensin on milk fat production might be mediated through inhibition of specific protozoal genera. C. Reveneau*, S. K. R. Karnati, C. V. D. M. Ribeiro, E. R. Oelker, B. Mathew, D. R. Bae, C. M. Drow, and J. L. Firkins, The Ohio State University, Columbus.

3:30 PM


Effect of mannan-oligosaccharides on the mucosal immune system of dairy calves. V. C. Quezada*, B. B. Babatunde, and T. L. Frankel, La Trobe University, Bundoora, Victoria, Australia.

3:45 PM


Effect of anion supplementation to low potassium prepartum diets on macromineral status and performance of periparturient dairy cows. J. M. Ramos-Nieves*1, B. J. Thering1, P. W. Jardon2, and T. R. Overton1, 1Cornell University, Ithaca, NY, 2West Central®, Ralston, IA.

4:00 PM


Effects of an injectable chelated mineral supplement on dairy calf performance. J. R. Crenwelge*1, T. D. Nennich2, B. D. Lambert1,2, N. M. Cherry2, and E. R. Jordan3, 1Tarleton State University, Stephenville, TX, 2Texas A&M University, Stephenville, 3Texas A&M University, Dallas.

4:15 PM


Calcium and phosphorus balance and bone mobilization through lactation with varying dietary calcium concentrations. M. S. Taylor*1, K. F. Knowlton1, M. L. McGilliard1, W. S. Swecker, Jr.1, J. D. Ferguson2, and Z. Wu2, 1Virginia Polytechnic Institute and State University, Blacksburg, 2University of Pennsylvania, Kennett Square.

4:30 PM


Ovulation and CL development in mature cows given pLH or GnRH. T. O. Ree*1,2, M. G. Colazo3, D. J. Ambrose3,2, A. G. A. Lamont2,3, J. P. Kastelic4, M. K. Dyck2, R. J. Mapletoft5, and B. N. Ametaj2, 1Lakeland College, Vermilion, AB, Canada, University of Alberta, Edmonton, AB, Canada, 3Alberta Agriculture and Food, Edmonton, AB, Canada, 4Agriculture and Agri-food Canada, Lethbridge, AB, Canada, 5University of Saskatchewan, Saskatoon, SK, Canada.


4:45 PM


Early postpartum biochemical and management characteristics related to dairy cow removal. C. S. McConnel*, S. M. Hiibel, J. A. Kidd, A. E. Hill, and F. B. Garry, Colorado State University, Fort Collins.

5:00 PM


Effect of dietary energy and metabolizable protein in lactating dairy cows. A. G. Rius*, M.L. McGilliard, and M.D. Hanigan, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA.


4:00 PM


Photoperiod alters metabolic gene expression in bovine liver potentially through suppressors of cytokine signaling. E. E. Connor*1, E. D. Thomas2, and G. E. Dahl3, 1Bovine Functional Genomics Laboratory, USDA-ARS, Beltsville, MD, 2Department of Animal and Avian Sciences, University of Maryland, College Park, 3Department of Animal Sciences, University of Florida, Gainesville.

4:15 PM


Effects of intramammary infusions of serotonin (5-HT) and methysergide (METH), a 5-HT antagonist, on milk production and composition in lactating dairy cows. L. L. Hernandez*1, J. B. Wheelock1, G. Shwartz1, L. H. Baumgard1, A. M. Parkhurst2, and R. J. Collier1, 1University of Arizona, Tucson, 2University of Nebraska, Lincoln.

4:30 PM


Chitotriosidase activity in blood and colostrum at peripartum period in goats. N. Castro1, J. Capote2, A. Morales1, C. Rodriguez1, and A. Arguello*1, 1Las Palmas de Gran Canaria University, Animal Science Unit, Arucas, Las Palmas, Spain, Canary Agronomic Science Institute, La Laguna, Tenerife, Spain.


4:45 PM


Pre-pubertal nutrition affects mammary development and first lactation performance depending on growth potential in dairy sheep. A. Zidi1, G. Caja*1, M. Ayadi2, V. Castillo1, C. Flores1, and X. Such1, 1Universitat Autònoma de Barcelona, Bellaterra, Spain, 2Institut Superieur de Biologie Appliquée de Medenine, Tunisia.

Graduate Student Paper Competition: National ADSA Production Division Chair: Mary Beth Hall, U.S. Dairy Forage Research Center, USDA-ARS 204 B

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