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Showing 1 to 20 of 22 for “"rumen ammonia"”.
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Effect of protein source on milk composition of cows fed low fiber, high grain diets
… protein yield was different across treatments. Rumen ammonia concentrations differed significantly with HSB (13.5 mg/dl) higher than LSB (7.33 mg/dl), indicating the increase in ruminally degraded protein. Plasma urea concentrations reflected rumen ammonia concentrations with HSB (16.2 mg/dl) …
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Comparison of pelleted vesus unpelleted soybean meal and soybean mal versus brewers grains for lactation
… intake for diets containing brewers and lower rumen ammonia and plasma urea. Cows receiving brewers diets have higher intakes than SBM and brewers appear to be utilized more efficiently. For mid-lactating cows an increase in milk at 18.0% CP resulted from brewers diets but not SBM. The H level …
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Utilization of Aspen Pellets as a Partial Roughage Replacement for Lactating Dairy Cows
… ration B consumed 19.28 kg DM on a daily basis. Rumen samples were taken via the stomach tube 3-4 hours after feeding the fourth week of each period. Rumen ammonia was similar for both groups. Concentration of total volatile fatty acids for cows fed rations A and B (48.71, 63.17 moles/ml) was …
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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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Rumen Microbial Protein Synthesis in Cows Fed Dried Whey
<p>Two rumen fistulated Holstein cows, weighing approximately 550 kg, were used in a switchback design experiment to evaluate the effects of consuming large amounts (38% of total ration dry matter) of dried whey on rumen microbial protein synthesis. Cows were fed total mixed rations consisting of …
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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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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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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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Heat-Treated Soybean Proteins for Lactating Dairy Cattle
… fat were increased with HTP and HTP-U diets. Rumen ammonia and serum urea were lower when fed HTP and HTP-U. This study indicates that heating soybeans improved their value slightly as a feed for lactating cows, but milk production by cows past peak production was not significantly greater …
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Intake, Digestibility, Insitu Disappearance and Ruminal Fermentation of Bermuda Grass Hay by Lactating Beef Cows Offered Corn or Hominy Feed as Supplements
… concentrations of volatile fatty acids (VFA) and rumen ammonia-N. Hay dry matter intake (DMI) was not affected (<em>P</em> = 0.35) by supplement. Total DMI (kg/d and % of BW) were greater (<em>P</em> < 0.05) for MC and MH compared with the other treatments. Dry matter digestibility did not differ …
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Intake, digestion site, extent of digestion and digesta kinetics in grazing lactating cows
… in grazing lactating cows. Four dual cannulated (rumen and proximal duodenum) cows were randomly assigned to two groups to graze permanent pasture with no supplement or with 6.4 kg/d corn-mineral mix in a switchback design with three periods of two wk each. Solid and liquid markers (chromic oxide …
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Soybean Meal Substitution with a Microbial Protein Source in Dairy Cow Diets
… meal on milk production, dry matter intake, rumen, and blood parameters of high producing dairy cows. Sixteen Holstein cows (twelve multiparous and four primiparous) with 93 ± 37 DIM were used in a 4 x 4 Latin square design with four 28 d periods. Cows were blocked by parity and production, …
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Evaluation of Urea and Dried Whey in Diets of Cows During Early Lactation
… nitrogen may be utilized more efficiently for rumen microbial production in diets containing dried whey. To further evaluate this, 33 Holstein, cows (30 multiparous and 3 primiparous) were fed one of three concentrate mixes containing all natural proteins (SBM). 1% urea (U), or 1% urea and 30% …
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White clover inclusion in intensive dairy production systems
… production, dairy cow production, dairy cow rumen function and overall farm gate N balance were investigated. White clover inclusion increased herbage production at fertiliser application rates of up to and including 180 kg N/ha/year in the plotbased study described in chapter 4 of this …
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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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Improving Feed Efficiency Through Forage Strategies for Increasing Dairy Profitability and Sustainability
… cobalt-lactate supplementation decreased 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) …
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Effects of supplementing beef cows grazing forages with wheat-based dried distillers’ grains with solubles on animal performance, forage intake & rumen metabolism
… total tract digestibility, and passage rate; rumen fermentation parameters; and the rate and extent of forage degradation were measured. Forage intake, passage rate, and apparent total tract digestibility of DM, NDF, and ADF were not affected (P > 0.41) by treatment. Apparent total tract …
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Grazing and Feeding Management of Lactating Dairy Cows
… with different forms and amounts of corn. Also rumen fermentation parameters were measured in cows supplemented with two different types of corn. In study 2, milk yield was measured when grazing pasture was supplemented to lactating Holstein cows fed a typical TMR diet. Predominantly …
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An Evaluation of Rumen Modifiers for Lactational Performance and Nutrient Digestibility by Cows
… and cobalt lactate on production performance, rumen fermentation and nutrient digestibility by cows by using <em>in vivo</em> and <em>in vitro</em> methods. The first study evaluated the lactational performance and nutrient digestibility of lactating Holstein dairy cows fed two commercial …
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