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Showing 1 to 20 of 42 for “"Ruminal pH"”.
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COMPARING VARIOUS FIBER SOURCES THROUGH MEASURING RUMINATION IN FINISHING BEEF CATTLE
… and diet samples were sieved to estimate physically effective NDF (epeNDF) using the Penn State Particle Separator. Actual physically effective NDF (apeNDF) was calculated based on rumination time. Neither initial nor final body weight (FBW) differed among treatments (P > 0.52); however, …
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Effects of dry versus modified wet distillers grains with solubles with or without calcium oxide on economics, growth performance, and ruminal metabolism of beef feedlot steers
… (P ≥ 0.12) of DGS type and CaO addition on ruminal pH, VFA, enzymatic activity, methane concentration, or in situ DM and NDF disappearance; therefore, only main effects are discussed. Steers fed DDGS increased (P < 0.01) DMI compared to steers fed MDGS; however, CaO supplementation reduced …
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Investigating the effects of direct-fed microbials on beef cattle during an acidosis challenge
Ruminal acidosis is a prevalent and costly metabolic disorder in beef feedlot cattle characterized by low ruminal 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 …
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Inclusion of wet corn gluten feed with physically effective neutral detergent fiber and the resulting effects on production
… shown that increasing WCGF inclusion decreased ruminal pH. Lack of adequate particle size may result in this decrease and can impact efficiencies, animal health and longevity. A study was conducted to look at the effects of feeding WCGF while maintaining > 10% of particles > 19 mm across diets. …
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Modeling Nitrogen and Energy Metabolism in the Bovine
… accuracy of the Molly cow model predictions of ruminal metabolism and nutrient digestion when simulating dairy and beef cattle diets, 2) advance representations of N recycling between blood and the gut and urinary N excretion in the model, 3) improve the representation of pH and to refit …
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Nutritional value of flat pea hay fed to sheep at different levels
… flatpea in the diet. Blood urea-N (BUN), ruminal pH and NH3-N increased (P<.005) as proportion of flatpea increased. Total volatile fatty acid (VFA) and acetate concentration decreased linearly (P<.005) and propionate, isovalerate, and valerate levels increased linearly (P<.01) with …
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The effect of sodium bicarbonate or live yeast culture (Saccharomyces cerevisiae) on the metabolism and production of Lactating dairy cows
… yeasts to dairy cows has the ability to moderate ruminal pH. The objective of this study was to compare the effects of feeding live yeasts or sodium bicarbonate, a traditional buffer, on metabolic indices, digestibility of the total mixed ration (TMR) and milk production and composition in …
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Effects of supplement type and forage type on ruminal metabolism and diet digestibility of cattle
… versus corn stover, on diet digestibility and ruminal metabolism of cattle. Ruminally fistulated steers were used in a replicated 4×4 Latin square with a 2×2 factorial arrangement of treatments: 1) hay with a liquid supplement (HL), 2) hay with a dry supplement (HD), 3) corn stover with a …
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Effect of the maturity at harvest of whole-crop barley and oat on dry matter intake, forage selection, and digestibility when fed to beef cattle
… barley and oat whole-crop forage on feed intake, ruminal fermentation and digestibility, and the impact forage allocation has on intake and ruminal fermentation. In the first 2 studies, whole-crop barley (Study 1; c.v. CDC Cowboy) and oat (Study 2; c.v. CDC Weaver) forage were harvested at the …
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Feeding behavior and metabolism of transition dairy cows supplemented with monensin
… modulates transition cow feeding behavior, ruminal pH, and/or expression of key metabolic genes. Overall, monensin decreased time between meals prepartum (126 vs. 143 ± 5.0 min; P < 0.03) with a trend appearing postpartum (81.4 vs. 88.8 ± 2.9 min; P < 0.08), which could be related to the …
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Metabolic alterations to sudden introduction of high carbohydrate diets in ruminating dairy bull calves
… TDN diets by anorexia, stiffness and diarrhea. Ruminal pH was lower and L- and D-lactates greater in the rumen of 81% TDN treatments. Total ruminal VFA decreased as pH declined. Proportion of acetate increased while propionate decreased in 81% TDN treatments. Butyrate differed but was not …
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Varying rumen available carbohydrate and rumen available protein in diets of lactating cattle
… milk composition, nutrient flow to the duodenum, ruminal and total tract nutrient digestibilities, and ruminal pH, ammonia-N, and VFA concentrations in lactating cows. The first study was a response surface design utilizing nine dietary combinations of RAC and RAP. The response surfaces of all …
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Further elucidating the effects of ruminal and hindgut acidosis on the ruminant animal
… study was to determine the impact of a bout of ruminal acidosis on rumen fermentation, rumen microbiome, and energy metabolism of cattle unadapted to a concentrate-based diet. Eleven ruminally cannulated steers (body weight = 352 kg ± 27) were blocked into 3 groups based on initial body weight. …
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EFFECTS OF DIETARY COMPOSITION AND FEEDING MANAGEMENT REGIMEN ON FEEDLOT CATTLE PERFORMANCE
… steer performance (BW, fecal score, and fecal pH) were collected every 56 d until harvest. Within each pen, 3 steers closest to the median body weight (BW) were selected to serve as a subset (n = 144). On d 0, the subset were administered a 3-axis accelerometer ear tag (AllFlex), and an …
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The effects of dosing feedlot cattle with Megasphaera elsdenii strain NCIMB 41125 prior to the introduction of a grain-rich diet
… to evaluate the efficacy of [italic]Megasphaera elsdenii[italic] strain NCIMB 41125 and its potential use in the mitigation of ruminal acidosis. In experiment 1, a metabolism study was conducted to evaluate ruminal parameters, quantify changes in ruminal bacterial populations, and …
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Improving Feed Efficiency Through Forage Strategies for Increasing Dairy Profitability and Sustainability
… rumen ammonia concentrations, increased ruminal molar concentrations of acetate and numerically increased fiber digestion. The second study evaluated Saccharomyces cerevisiae fermentation products (SCFP); (Diamond V original XPC and two prototypes) on lactational performance and ruminal …
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Grazing and Feeding Management of Lactating Dairy Cows
… in two equal feedings. After the p.m. milking, ruminal pH was measured and rumen fluid samples were collected to determine ammonia N and VFA. While grazing, this was repeated at 0.5, 1, 2, 3,...8 h post-corn feeding (0 h). Ruminal pH was similar for both corn supplements and was lowest (5.9 and …
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The effect of supplementation strategy, stress level, and tall fescue type on performance of fall-weaned beef calves
… frequency performance and the effects of the ruminal environment. In Exp. 1, 48 weaned steers were used to investigate the effects of transportation and supplementation frequency, while in Exp. 2, 36 heifers were used to investigate only supplementation frequency. No differences in gains were …
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Effects of feeding CaO treated modified wet distillers grains with solubles or corn stover to cattle on performance, carcass characteristics, and ruminal metabolism
… through delignification, and 2) buffering ruminal acidity. It is currently not known if these mechanisms can be accomplished simultaneously with the use of calcium oxide (CaO) in CS and MWDGS-based diets, nor has the magnitude of the response of CaO in these types of diets been …
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Alternative management strategies for growing and stocker cattle
… diets. Three-hundred sixty-four steers and 8 ruminally cannulated heifers were fed 1 of 4 experimental diets. The control diet contained (DM basis) 39.5% dry-rolled corn, 7.5% supplement, 40% wet-corn gluten feed, and 13% prairie hay. Non-ground or ground almond hulls replaced prairie hay and …
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