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Influence of carbohydrate source on nitrogen metabolism and microbial protein synthesis in dairy cows. G. N. Gozho* and T. Mutsvangwa, University of Saskatchewan, Saskatchewan, Canada.


Supplementation of lactating cows receiving high citrus pulp diets with heated soybeans. G. S. Dias Júnior1, A. van Vugt2, G. Warringa2, C. A. Mello, Jr.3, and M. N. Pereira*1, 1Universidade Federal de Lavras, Brazil, 2Wageningen University, Holland, 3Nutron Alimentos, Brazil.


Comparison of protein disappearance of alfalfa hay and barley grain by in vivo, mobile bag and 3-step methods. H. Jahani-Azizabadi, M. Danesh Mesgaran*, R. Valizadeh, and H. Nasirimoghadam, Ferdowsi University of Mashhad, Mashhad, Iran.


Evaluation of a rumen undegradable soybean product for lactating dairy cattle. S. S. Donkin*1, S. L. Koser1, E. M. Barnes1, P. H. Doane2, J. L. Dunn2, and M. J. Cecava2, 1Purdue University, West Lafayette, IN, 2ADM Animal Nutrition Research, Decatur, IN.


The effects of controlled feeding a high concentrate or high forage diet at four nitrogen intakes on digestibility in dairy heifers. G. I. Zanton* and A. J. Heinrichs, The Pennsylvania State University, University Park.


Evaluation of the fermentation dynamics of the soluble protein fraction of three protein sources in continuous culture fermenters. M. Ruiz Moreno*1, A. Bach2,3, M. Thrune1, and M. D. Stern1, 1University of Minnesota, Saint Paul, 2ICREA, Barcelona, Spain, 3IRTA-Unitat de Remugants, Barcelona, Spain.


Supplementation of grazing dairy cows with high-fat dietary protein sources. R. Nyoka*, A. R. Hippen, and K. F. Kalscheur, South Dakota State University, Brookings.


Effects of pure essential oil compounds on the digestion of nitrogen in dairy cows. V. Noirot1 and C. Bayourthe*2, 1Phodé, Albi, France, 2Ecole Nationale Supérieure d'Agronomie de Toulouse, Castanet-Tolosan, France.


Effects of garlic and juniper berry essential oils on site and extent of digestion by dairy cows. W. Z. Yang*1, C. Benchaar2, A. V. Chaves1, M. L. He1, and T. A. McAllister1, 1Research Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada, 2Dairy and Swine R&D Centre, Agriculture and Agri-Food Canada, Lennoxville, QC, Canada.


Effect of vegetal extracts on rumen microbial fermentation in batch culture. M. Ruiz Moreno*1, A. Bach2,3, J. van Eys4, and M. D. Stern1, University of Minnesota, Saint Paul, 2ICREA, Barcelona, Spain, 3IRTA-Unitat de Remugants, Barcelona, Spain, 4Global Animal Nutrition, Paris, France.



Adding rare earth elements to beef cattle diets improved in situ digestibility in the rumen and digestibility in the total tract. Q. Liu1, W. Z. Yang*2, C. Wang1, Y. X. Huang1, K. H. Dong1, and H. Wang1, 1College of Animal Sciences and Veterinary Medicines, Shanxi Agricultural University, Taigu, Shanxi, China, 2Research Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada.


Ethanolic extract of propolis in lactating cows. J. A. De Freitas*1, J. C. De Souza1, R. P. Lana2, R. P. Antonangelo1, A. A. De Freitas2, and R. T. S. De Santana1, 1Federal University of Parana, Palotina, PR, Brazil, 2Federal University of Viçosa, Viçosa, MG, Brazil.


Ruminal bacterial diversity in cattle grazing wheat and supplemented with condensed tannins. B. R. Min*1, W. E. Pinchak1, M. E. Hume2, and R. C. Anderson2, 1Texas Agricultural Research Center, Vernon, TX, 2USDA/ARS, Food and Feed Safety Research Unit, College Station, TX.


In vitro manipulation of rumen fermentation by propolis flavonoids and monensin. S. M. J. Yaghoubi*1, G. R. Ghorbani1, H. R. Rahmani1, and A. Nikkhah2, 1Isfahan University of Technology, Isfahan, Iran, 2University of Manitoba, Winnipeg, MB, Canada.


Effects of zeolites and monensin on in vitro dry matter disappearance, pH change, and volatile fatty acid proportions. B. F. Domeniconi*1,2, J. P. McMeniman1, J. T. Vasconcelos1, and M. L. Galyean1, 1Texas Tech University, Lubbock, 2FMVZ-UNESP, Botucatu, Brazil.


Preservation of enzymatic activities in a liquid extract obtained after Agaricus bisporus growth. M. Ayala–Martínez1, S. S. González*2, G. D. Mendoza–Martínez3, C. Vázquez–González1, M. Meneses–Mayo2, O. Loera4, and J. H. Avellaneda–Cevallos5, 1UNAM, México D.F., Colegio de Postgraduados, Montecillo, Edo. México, México, 3UAM Xochimilco, México D.F., 4UAM Iztapalapa, México D.F., Universidad Tecnica Estatal de Quevedo, Quevedo, Ecuador.

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Activity of fibrolytic enzymes by Trametes sp. EUM1, Pleurotus ostreatus IE8 and Aspergillus niger AD96.4 in solid-state fermentation. A. T. Márquez-Araque1, G. D. Mendoza-Martínez2, S. S. González*3, S. E. Buntinx-Dios4, and O. Loera5, 1UNAM and UCLA, México D.F. and Caracas, Venezuela, 2UAM Xochimilco, México D.F., 3Colegio de Postgraduados, Montecillo, Edo. México, México, 4UNAM, México D.F., 5UAM Iztapalapa, México D.F.


Feed intake, nutrient digestibility and animal growth performance in sheep and goats fed wheat straw ad lib. in presence of ZADO as direct feed of anaerobic enzymes and bacteria. A. Z. M. Salem*1, M. El-Adawy1, H. Gado2, and M. Khalil3, 1Department of Animal Production, Faculty of Agriculture (El-Shatby), Alexandria University, Alexandria, Egypt, 2Department of Animal Production, Faculty of Agriculture, Ain Shams University, Cairo, Egypt, 3Animal Production Research Institute, Ministry of Agriculture, Dokki, Gizza, Egypt.


Performance of Holstein cows fed diets containing either alfalfa hay or Tifton 85 bermudagrass with or without a cellulase enzyme. J. K. Bernard*1, J. W. West1, and A. T. Adesogan2, 1The University of Georgia, Tifton, 2The University of Florida, Grainesville.


Effects of enzyme formulations on roasted grains and rations that contain them. K. F. Wilson*1, G. V. Pollard2, and C. R. Richardson3,


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