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Gabriella A. Varga
Researcher at Pennsylvania State University
Publications - 89
Citations - 4574
Gabriella A. Varga is an academic researcher from Pennsylvania State University. The author has contributed to research in topics: Dairy cattle & Rumen. The author has an hindex of 40, co-authored 89 publications receiving 4240 citations. Previous affiliations of Gabriella A. Varga include Agricultural Research Service.
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Journal ArticleDOI
Rumen-protected lysine, methionine, and histidine increase milk protein yield in dairy cows fed a metabolizable protein-deficient diet
Chanhee Lee,Alexander N. Hristov,T.W. Cassidy,K.S. Heyler,Hélène Lapierre,Gabriella A. Varga,M.J. de Veth,R.A. Patton,C. Parys +8 more
TL;DR: The data implicate His as a limiting AA in high-producing dairy cows fed corn silage- and alfalfa haylage-based diets, deficient in MP, and propose that, similar to monogastric species, AA play a role in DMI regulation in dairy cows.
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Evaluation of Chemical and Physical Properties of Feeds That Affect Protein Metabolism In the Rumen
Marshall D. Stern,Gabriella A. Varga,J.H. Clark,Jeffrey L. Firkins,J.T. Huber,D.L. Palmquist +5 more
TL;DR: Evaluating quantitatively the chemical and physical properties of protein and energy sources that determine AA availability to lactating cows and factors that alter microbial metabolism of N in the rumen and subsequently protein supply to the small intestine are evaluated.
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Nonstructural Carbohydrate and Protein Effects on Rumen Fermentation, Nutrient Flow, and Performance of Dairy Cows
TL;DR: Four multiparous Holstein cows fitted with rumen and duodenal cannulas were used and passage of bacterial N to the duodenum was highest when rumen availabilities of both nonstructural carbohydrate and protein were high.
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Effects of feeding dry glycerin to early postpartum Holstein dairy cows on lactational performance and metabolic profiles.
TL;DR: The tendency toward higher milk yield for glycerin-supplemented cows during wk 6 of lactation (52 vs. 46 kg/d) after the supplementation period suggested a potential benefit of dry Glycerin on subsequent milk production, perhaps through changes in metabolism, which requires further investigation.
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Synchronization of Ruminal Degradation of Supplemental Carbohydrate with Pasture Nitrogen in Lactating Dairy Cows
TL;DR: Based on changes in ruminal concentrations of ammonia, synchronous ruminal release of supplemental carbohydrate with pasture N appeared to improve the capture of ruminal N; however, these changes were transient and did not change the N status or performance of dairy cows.