Theses and Dissertations from UMD

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New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM

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Subject: search.filters.subject.dietary cation-anion difference

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    The impact of dietary ions on rumen ion concentrations
    (2015) Catterton, Tracy Lynn; Erdman, Richard A; Animal Sciences; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    Dietary cation-anion difference (DCAD) evaluates the strong ion balance in dairy cattle diets. We performed two experiments to study the impacts of strong dietary ions (Na, K, and Cl) on the rumen environment. Our overall hypothesis was that dietary strong ions would influence their corresponding rumen concentrations. Our objective was to determine the impact of the dietary strong ions on the rumen environment. In the first experiment, five fistulated dairy cows consumed the following treatments: (1) a basal diet composed of corn silage and alfalfa hay and then the basal diet supplemented with (2) NaCl, (3) KCl, (4) NaHCO3, and (5) K2CO3. Rumen samples were collected 0, 1.5, 3, 4.5, 6, 9, and 12 h post-feeding to measure ion concentrations, pH, and volatile fatty acid concentrations. In the second experiment, we conducted a meta-analysis of published literature that measured rumen strong ion concentrations.