Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Rumen environment"”.
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Effects of nutritional strategies on rumen environment and performance in dairy cows
… milk yield depression, reduced feed efficiency, rumenitis, diarrhea, laminitis, inflammation, liver abscesses, and high culling and death rates in dairy cattle had been extensively reported by previous authors (Nocek, 1997; Kleen et al., 2003; Stone, 2004; Alzahal et al., 2007; Enemark, 2008). …
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Effects of clay supplementation on rumen environment, metabolism, inflammation, and performance in dairy cows
… own properties. Clay supplementation effects on rumen, metabolism, and performance have been considered individually among studies. Our objective was to determine the effects of 3 percentages of dietary clay (EcoMix®) supplementation after two different challenges. Challenge one was to induce …
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Effects of stocking rate and supplementation on pasture utilization, cow performance, and rumen environment in a pasture-based and automatic milking system
… in feed degradation, suggesting that the rumen environment was not affected by PMR supplementation. No differences in pasture utilization or pasture growth were detected between the HSR and LSR treatments. The results of this thesis suggest that dynamic supplementation in the HSR treatment …
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Effects of autolyzed yeast (saccharomyces cerevisiae) on feed degradability and digestibility; performance, rumen environment, and physiological biomarkers of Holstein cows fed a high starch diet
… autolyzed yeast product (Levabon® Rumen E, BIOMIN Holding GmbH, Austria) in HS diets on lactation performance, rumen environment parameters, inflammatory markers, opportunity to improve N utilization, nutrient bioavailability, apparent digestibility, and in situ degradability, gene …
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The Low-Fat Milk Syndrome: A Consideration of the Methylmalonic Acid Theory and Some Observations Concerning Alterations in the Rumen Environment During the Feeding of High-Grain, Restricted-Roughage Diets
Made available in DSpace on 2015-05-13T15:26:57Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7820921.PDF: 3123812 bytes, checksum: bcef9953ddba677a80176998cc7555f3 (MD5) Previous issue date: 1978
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Effects of Sodium Bicarbonate, Sodium Chloride, Limestone, and Monensin on Rumen Fermentation, Rumen Fluid Dilution Rate, and Nutrient Utilization in Ruminants
… of mineral salts and monesin to alter the rumen environment and the efficiency of nutrient utilization in ruminants.
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Comparative genomic approaches for investigating evolution in the microbial and viral populations of the rumen
The rumen is home to a diverse population of microorganisms encompassing all three domains of life: Bacteria, Archaea, and Eukarya. Viruses have also been documented to be present in large numbers; however, little is currently known about their role in the dynamics of the rumen ecosystem. This …
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Millipede-Inspired Locomotion for Rumen Monitoring through Remotely Operated Vehicle
… of a remotely operated vehicle (ROV) for rumen monitoring to improve our understanding of microbiology, and real-time physical changes and correlations with health. This interest is being driven from the desire to improve the safety and efficiency of food production by improving precision …
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Effects of ruminal nutrient degradability on volatile fatty acid dynamics, ruminal epithelial gene expression, and post-absorptive system
… VFA concentrations, fluid flux and pool sizes, rumen epithelial metabolic and absorptive genes, and post-absorptive muscle and blood responses. Six ruminally cannulated Holstein heifers (BW=330 ± 11.3 kg) were used in a partially replicated Latin Square experiment with four treatments consisting …
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EVALUATION OF A METHOD TO MEASURE VOLATILE FATTY ACIDS AND GASES IN VITRO WITH MATHEMATICAL MODELING
… estimate gas production and VFA profile in rumen fermentation would enable isolation of fermentation effects from various animal interactions. Therefore, the focus of this dissertation was to develop an in vitro method that will have the same VFA and gas profiles as in the rumen. The …
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Effects of mixer type on utilization of diets with increasing amounts of modified wet distillers grains with solubles for lactating dairy cattle
… increased sorting that allowed for an altered rumen environment and favored alternative biohydrogenation pathways. Feed conversion efficiency (FCE; energy-corrected milk/DMI) decreased linearly (P = 0.007) as MWDGS increased, but FCE tended to be maintained when higher MWDGS diets were mixed …
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Gastrointestinal acidity, protein and starch digestibility and amino acid absorption in ruminants fed a high-concentrate diet with limestone, magnesium oxide or defluorinated phosphate
… the effect of·these minerals on intestinal pH, rumen fermentation, N balance, dry matter and crude protein digestibility (DMD, CPD), and small intestinal disappearance of amino acids (AAD). Limestone (3%) increased (P < .03) rumen pH. Magnesium oxide increased (P < .10) ileal and fecal pH. …
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RELATIONSHIPS BETWEEEN CARBOHYDRATE NUTRITION AND METABOLISM, INFLAMMATION, AND PERFORMANCE OF DAIRY CATTLE DURING THE PERIPARTURIENT PERIOD
… while also including higher fiber to promote rumen health have not been conducted. The objectives of this dissertation were to: 1) investigate interplay of fiber fractions in high starch postpartum dairy cow diets on performance, hepatic metabolism and energy balance, 2) examine interplay of …
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An Evaluation of a Yeast-Derived Mannan Oligosaccharide and Its Mode of Action in Swine
… vivo analysis of the effect of gastrointestinal environments on percent disappearance of Bio-MosRTM demonstrated that Bio-Mos RTM may be hydrolyzed by digestive enzymes but a significant percentage is able to survive the simulated environments and passage through the gastrointestinal tract of …
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Investigating the effect of yeast and mineral dietary supplements during the periparturient period on the production, physical health, and innate immune system of dairy cows
… fluctuations such as calcium, and adjust the rumen environment to the change in diet. This transition is also the cause of common early postpartum cow disorders that result from compromised immune function and a lack of metabolite availability. Different dietary strategies through ration …
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Sensor Technologies for Nutritional Management of Ruminants
… are limited in the ability to explore the rumen environment. The overall goal of this work was to explore sensing technologies that could enable shifts in management to maximize productivity in ruminant production systems. In the first study, we assessed the use of existing sensor …
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Effects of supplement type and forage type on ruminal metabolism and diet digestibility of cattle
… collections (5 d digestibility collection, a 1 d rumen fluid collection, a 1 d in-situ incubation phase and Block 1 methane collection, and a 1 d Block 2 methane collection). In-situ disappearance, which measures the degradation of DM and NDF occurring in the rumen alone, was determined by placing …