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Showing 1 to 20 of 26 for “"rumen pH"”.
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A Model to Predict Fluctuations in Rumen pH
Factors affecting pH and the mechanism of rumen pH control are poorly understood. Meta-analysis was conducted to estimate the effect of sodium bicarbonate (NaHCO3) on rumen pH. Addition of NaHCO3 increased strong ion difference (SID) and rumen pH while, volatile fatty acid concentration remained …
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The effect of supplementary maize silage on rumen function in dairy cows grazing high quality pasture : A thesis submitted in partial fulfilment of the requirements for the Degree of Bachelor of Agricultural Science with Honours at Lincoln University
… of maize silage altered the diurnal pattern of rumen pH, with the pH of maize supplemented cows being significantly higher than that of pasture-fed (control) animals for several intervals of the day. Consequently, the diurnal rumen pH curve was flatter as a result. This increase in mean rumen pH …
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Rumen biohydrogenation of polyunsaturated fatty acids in high quality pasture
… second experiment to determine the effect of low rumen pH on biohydrogenation of C18 fatty acids. A standard ryegrass sample was incubated in nylon bags in the rumen of a dry cow fed low-quality lucerne silage, or in two milking cows fed with high-quality LUDF pasture, during four experimental …
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Effect of roughage to concentrate ratio on ruminal fermentation and protein degradability in dairy cows
… it might be beneficial to increase the amount of rumen undegradable protein (RUP) that passes out of the rumen, through manipulation of rumen fermentation to establish a lower rumen pH. To test this hypothesis, a study was conducted in which three ruminally cannulated Holstein cows, 722 kg ±25.6 …
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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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Alternative Feeding Resources in the Mediterranean areas to mitigate methane emissions from sheep
… and productivity both in vivo and at slaughter, rumen pH and fatty acids, rumen microbial ecosystem and in vitro fermentation kinetics. It was found that both carob pup and DCP ingesting animals had similar performance and productivity. The feed conversion ratio (FCR) was 0.25 for all the diets …
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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
… study 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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Starch Digestion and Phosphorus Excretion in Lactating Dairy Cows
The effects of starch and phosphorus (P) source on P partitioning and ruminal phytase activity were evaluated in eight lactating cows (113 DIM). Four cows were ruminaly cannulated. Cows were randomly assigned to treatments in a duplicated 4x4 Latin square with four, 18-d periods. Diets included dry …
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Feeding Value of Brown-Midrib Corn Silage for Lactating Dairy Cows
… nitrogen utilization for the two silage rations. Rumen sample were taken via the stomach tube at 0, 3, 6, 9 and 12 hr post-feeding the last day of the digestion trial. Concentrations of total volatile fatty acids (59.8 and 66.7 moles/ml for bm<sub>3</sub> and N) and butyrate (9.7 and 11.9 …
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The Effects of Calcium Hydroxide Treatment of Sunflower Seeds on Ration Digestibility and Rumen Parameters in Holstein Steers
… fatty acid concentrations among treatments. Rumen pH, rumen ammonia, and serum urea levels were similar for all treatments. Analysis of rumen fluid dry matter (RFDM) indicated an increase in total fatty acid (TFA) concentrations with sunflower rations as compared to CSM, while calcium …
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Growth, Rumen Development, and Metabolism of Holstein Calves Fed Distillers Grains
… to determine the effect of distillers grains on rumen development, growth and metabolic responses of newborn calves. Calves were fed a control diet with no distillers grains and two experimental diets containing 28% and 56% distillers grains respectively. Feeding distillers grains at 56% OM of …
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Programmed Feed Intake of High Energy Diets Influences Digestibility and Maintenance Requirements of Beef Cattle
… acetate and butyrate proportions in the rumen in comparison to the corn based diet (P < 0.05). Programmed feeding of either the corn or soyhull based diet increased rumen pH (P < 0.05). An increase of total nitrogen flow to the small intestine was observed (P < 0.05) for the ad libitum …
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Digestion and utilization of nutrients in diets containing feather meal and (or) supplemental fat by lactating dairy cows
… similar for all diets. No changes were seen in rumen pH, rumen ammonia-N, VFA's, or rumen bacteria AA. Intake and fecal output of total, essential, and non-essential AA were greater when cows were fed diets containing feather meal. However, flow of AA to the duodenum, AA absorbed, and AA …
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Using different levels of direct-fed microbials during an acidosis challenge and the effects of distillers grains on feeding behavior in the feedlot
… in beef feedlot cattle characterized by low rumen pH and can lead to a multitude of health problems and poor animal performance. Direct-fed microbials (DFM) are naturally occurring microorganisms that can be used to improve rumen fermentation and alleviate nutritional disorders. The objective …
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Nutrient Impacts on Rumen Growth and Development
… of calf nutrition with a central focus on rumen growth and development. The first study performed used 8 Holstein bull calves to determine if calf starters differing in starch and neutral detergent fiber (NDF) content would affect calf growth, intake, rumen metabolites, blood metabolites, …
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Effects of fermentation products of silage on its intake by cattle
… to which lactic acid is metabolised in the rumen depressed silage intake by dairy cows, but this was attributed to a fall in rumen pH. Urea, used to mimic silage ammonia had no effect on voluntary intake of hayand silage- fed cattle. This supports the theory that rather than ammonia per se …
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Environmental, Biochemical, and Dietary Factors that Influence Rumen Development in Dairy Calves
… individual cows. While the development of the rumen is one of the most vital contributors to the performance of the calf, it remains unknown what molecular mechanisms are responsible for the development of the rumen, and more specifically the proliferation of rumen epithelial cells. The …
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Effect of nitrogen and energy supplementation on intake, digestibility and rumen fermentation efficiency in sheep fed poor quality Eragrostis curvula hay
… In Trial 1, urea partially substituted the rumen degradable nitrogen (RDN) fraction of sunflower meal (SFM). Neutral detergent fibre (NDF) digestibility was higher in the treatments where urea substituted 45% and 60% of the RDN fraction of SFM. Treatment did not affect roughage intake, rumen …
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Replacing Corn and Soybean Meal in Lactating Dairy Cow Diets with Field Peas (Pisum Sativum)
… decreased linearly with the inclusion of peas. Rumen pH had a quadratic response to increasing inclusion of peas while rumen ammonia-N had a cubic response. Total volatile fatty acid had a quadratic response with FP24 being the greatest. Propionate and butyrate had cubic responses to increasing …
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Characterizing Thiamine Status and Mechanisms of Thiamine Supplementation on Subacute Ruminal Acidosis Attenuation in Dairy Cows
… which is characterized by prolonged decrease in rumen pH and high levels of lipopolysaccharide (LPS). SARA challenge has been confirmed to severely impair animal health, production performance and farm profitability, and more and more attentions have been paid to prevent the occurrence of SARA in …
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