The Effect of Urea on Rumen Microbiology and Metabolism

Brüggemann, J.; Giesecke, D.

doi:10.1016/b978-0-08-012078-2.50011-8

Cited by 6 publications

(4 citation statements)

References 139 publications

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“…Addition of urea to the control alfalfa diet tended to increase the net PDV appearance of total VFA (P < 0.14; 655 vs. 741 mmol/h), suggesting that feeding urea affected the pattern of microbial fermentation in the rumen and/or VFA absorption in these steers fed every 2 h. In other studies, feeding urea increased total VFA concentrations in the rumen (Bruggemann and Giesecke, 1967;Chalupa et al, 1970). The increase in net PDV release of VFA was the result of a nonsignificant increase in the net release of each individual VFA, but most notably a 16% increase in acetate absorption.…”

Section: Nutrients and Oxygenmentioning

confidence: 66%

Splanchnic metabolism of nutrients and hormones in steers fed alfalfa under conditions of increased absorption of ammonia and L-arginine supply across the portal-drained viscera1,2,3

Maltby

Reynolds

Lomax

et al. 2005

Journal of Animal Science

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Effects of increased ammonia and/or arginine absorption on net splanchnic (portal-drained viscera [PDV] plus liver) metabolism of nonnitrogenous nutrients and hormones in cattle were examined. Six Hereford x Angus steers (501 +/- 1 kg BW) prepared with vascular catheters for measurements of net flux across the splanchnic bed were fed a 75% alfalfa:25% (as-fed basis) corn and soybean meal diet (0.523 MJ of ME/[kg BW(0.75).d]) every 2 h without (27.0 g of N/kg of DM) and with 20 g of urea/kg of DM (35.7 g of N/kg of DM) in a split-plot design. Net flux measurements were made immediately before and after a 72-h mesenteric vein infusion of L-arginine (15 mmol/h). There were no treatment effects on PDV or hepatic O2 consumption. Dietary urea had no effect on splanchnic metabolism of glucose or L-lactate, but arginine infusion decreased net hepatic removal of L-lactate when urea was fed (P < 0.01). Net PDV appearance of n-butyrate was increased by arginine infusion (P < 0.07), and both dietary urea (P < 0.09) and arginine infusion (P < 0.05) increased net hepatic removal of n-butyrate. Dietary urea also increased total splanchnic acetate output (P < 0.06), tended to increase arterial glucagon concentration (P < 0.11), and decreased arterial ST concentration (P < 0.03). Arginine infusion increased arterial concentration (P < 0.07) and net PDV release (P < 0.10) and tended to increase hepatic removal (P < 0.11) of insulin, as well as arterial concentration (P < 0.01) and total splanchnic output (P < 0.01) of glucagon. Despite changes in splanchnic N metabolism, increased ammonia and arginine absorption had little measurable effect on splanchnic metabolism of glucose and other nonnitrogenous components of splanchnic energy metabolism.

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Section: Nutrients and Oxygenmentioning

confidence: 66%

Splanchnic metabolism of nutrients and hormones in steers fed alfalfa under conditions of increased absorption of ammonia and L-arginine supply across the portal-drained viscera1,2,3

Maltby

Reynolds

Lomax

et al. 2005

Journal of Animal Science

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“…Das Untersuchungsmaterial bestand aus Fettgewebsproben (Omentum oderiund Orbita) von 10 Tieren bis zu 1 Jahr und von 14 Tieren ( $ und 9) von 1 bis 2,5 Jahren aus dem Ebersberger Forst sowie aus Sammelproben von Nahrungspflanzen aus demselben Biotop (BRUGGEMANN, 1967)…”

Section: Materials Und Methodenunclassified

Biologisch‐chemische Untersuchungen über die ontogene Modifikation von Fettgeweben beim Rothirsch¹

Schubert¹,

Giesecke²

1972

Zeitschrift für Tierphysiologie Tierernährung und Futtermittelk

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Zusammenfassung Gaschromatographische Analysen der Fettsäuren in Fettgeweben (Omentum, Orbita) von 24 Rothirschen (♂ und ♀) im Alter von 3 bis 30 Monaten ergaben eine Abnahme der Fettsäuren C‐12:0, C‐14:0, C‐16:0 und C‐20:2 bei Zunahme von C‐18:0 bis zum Alter von 12 bis 18 Monaten. Diese Modifikation der Fettgewebe wird an Hand von Fettsäuremustern in Milch‐ und Pflanzenlipiden auf Entwicklung der Nahrungswahl und Vormagenfunktion zurückgeführt und hinsichtlich der Stoffwechsel‐kinetik erörtert.

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“…

Des possibilités de carences en vitamines du groupe B chez les ruminants ont été signalées (Bruggeman et Giesecke, 1967)

…”

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Influence des vitamines du groupe B sur la nutrition azotée du mouton

Candau¹,

Kone²,

Morzières³

1981

Reprod. Nutr. Dévelop.

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The Effect of Urea on Rumen Microbiology and Metabolism

Cited by 6 publications

References 139 publications

Splanchnic metabolism of nutrients and hormones in steers fed alfalfa under conditions of increased absorption of ammonia and L-arginine supply across the portal-drained viscera1,2,3

Splanchnic metabolism of nutrients and hormones in steers fed alfalfa under conditions of increased absorption of ammonia and L-arginine supply across the portal-drained viscera1,2,3

Biologisch‐chemische Untersuchungen über die ontogene Modifikation von Fettgeweben beim Rothirsch¹

Influence des vitamines du groupe B sur la nutrition azotée du mouton

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The Effect of Urea on Rumen Microbiology and Metabolism

Cited by 6 publications

References 139 publications

Splanchnic metabolism of nutrients and hormones in steers fed alfalfa under conditions of increased absorption of ammonia and L-arginine supply across the portal-drained viscera1,2,3

Splanchnic metabolism of nutrients and hormones in steers fed alfalfa under conditions of increased absorption of ammonia and L-arginine supply across the portal-drained viscera1,2,3

Biologisch‐chemische Untersuchungen über die ontogene Modifikation von Fettgeweben beim Rothirsch1

Influence des vitamines du groupe B sur la nutrition azotée du mouton

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Biologisch‐chemische Untersuchungen über die ontogene Modifikation von Fettgeweben beim Rothirsch¹