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Sterry*1, E. Silva1, D. Kolb2, and P. M. Fricke1, 1University of Wiscosin-Madison, 2Lodi Veterinary Clinic, Lodi, WI.


Effect of human chorionic gonadotropin or gonadotropin releasing hormone injected 5 or 7 days after 72 h Co-Synch on first service pregnancy rates in lactating dairy cows. R. L. Nebel*1, J. M. DeJarnette1, D. A. Whitlock1, C. E. Marshall1, M. R. Mink2, and R. Kasimanickam2, 1Select Sires Inc., Plain City, OH, 2Virginia-Maryland Regional College of Veterinary Medicine, Blacksburg.


Effect of time of AI and supplemental estradiol on reproductive performance of dairy cows. J. Hillegass*, F. S. Lima, M. F. Sa Filho, and J. E. P. Santos, Veterinary Medicine Teaching and Research Center, Univesity of California Davis, Tulare.


Strategies to maximize ovulation to first GnRH of Ovsynch in lactating dairy cows. N. M. Bello* and J. R. Pursley, Michigan State University, East Lansing.


Pregnancy rates to timed-AI of dairy cows treated with pLH or GnRH. M. G. Colazo*1, D. J. Ambrose1, and R. J. Mapletoft2, 1Alberta Agriculture and Food, Edmonton, AB, Canada, 2WCVM, University of Saskatchewan, Saskatoon, SK, Canada.


Prepartum feed restriction and fatty acid supplementation influence reproductive performance of dairy cows. M. G. Colazo*1, D. J. Ambrose1,2, A. Hayirli2, and L. Doepel2, 1Alberta Agriculture and Food, Edmonton, AB, Canada, 2University of Alberta, Edmonton, AB, Canada.


Evaluation of feed restriction and pre-synchronization in a program for estrous synchronization. P. Molina1, T. Sánchez1, O. Mejía2, J. Nuñez2, E. García*3, O. D. Montañez-Valdez4, J. Cordero1, J. Peralta1, M. E. Ortega1, R. Nieto5, E. Mendoza1, and R. Avila1, 1Colegio de Postgraduados, Montecillo, Estado de México, México, 2Facultad de Medicina Veterinaria y Zootecnia, UNAM, Tres Marías, Municipio de Huitzilac, México, 3Centro Universitario de la Costa Sur de la Universidad de Guadalajara, Autlán, Jalisco, México, 4Centro Universitario del Sur de la Universidaad de Guadalajara, Ciudad Guzmán, Jalisco, México, 5Instituto Tecnológico Agropecuario No.6, Huejutla, Hidalgo, México.


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.


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, 2University 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..


Human resource management and dairy employee organizational commitment. R. E. Stup*, The Pennsylvania State University, University Park.


The amount of concentrate offered in automated milking systems does not influence the frequency of visits of dairy cattle consuming high levels of corn silage. A. Bach*1,2, C. Iglesias3, M. Devant2, and A. Ferrer2, 1ICREA, Barcelona, Spain, 2IRTA-Unitat de Remugants, Barcelona, Spain, 3SEMEGA, Girona, Spain.


Effects of dam's dry period length on calf. M. T. Kuhn*, J. L. Hutchison, and H. D. Norman, Animal Improvement Programs Laboratory, Beltsville, MD.


An analysis of the relationship between wash water quality and bulk tank milk quality on Ontario dairy farms. N. R. Perkins*1, D. F. Kelton1, K. E. Leslie1, K. J. Hand2, G. MacNaughton3, and O. Berke1, 1University of Guelph, Ontario, Canada, 2CanWest DHI, Guelph, Ontario, Canada, 3Dairy Farmers of Ontario, Mississauga, Ontario, Canada.


Body weight of Holstein heifers as measured by heart girth tape and electronic scale: A comparison. J. E. Wohlt*1, C. E. Reich1, and J. Ferguson2, 1Rutgers University, New Brunswick, NJ, 2University of Pennsylvania, Kennett Square.


Dairy farm sustainability: The economic component indicators. D. L. Larochelle*, D. P. Parent, G. A. Allard, and D. P. Pellerin, Laval University, Quebec, Quebec, Canada.


A comparison of body temperature measures between Holstein and Gir × Holstein cows in relation to environment and stage of the estrous cycle. S. Dray*, A. Harris, R. Farrar, G. Grissett, S. Laird, and S. Willard, Mississippi State University, Mississippi State.


Evaluation of the pedometer system efficiency. R. M. Santos*1, J. L. M. Vasconcelos2, and S. Soriano3, 1UFU, Uberlândia, MG, 2FMVZ- UNESP, Botucatu, SP, 3Fazenda Colorado, Araras, SP, Brazil.


Effect of nitrogen intake, straw and days of storage on pH, temperature and ammonia emission from dairy cow manure. M. J. Aguerre*1, M. A. Wattiaux1, and T. Hunt2, 1University of Wisconsin, Madison, 2University of Wisconsin, Platteville.


Dairy manure estrogens with advanced treatments. Z. Zhao*, K. F. Knowlton, N. G. Love, and Y. Fang, Virginia Polytechnic Institute and State University, Blacksburg.

Production, Management & the Environment - Livestock and Poultry II Exhibit Hall C


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