Quantifying ruminal nitrogen metabolism using the omasal sampling technique in cattle--a meta-analysis

Journal of Dairy Science
G A BroderickK J Shingfield

Abstract

Mixed model analysis of data from 32 studies (122 diets) was used to evaluate the precision and accuracy of the omasal sampling technique for quantifying ruminal-N metabolism and to assess the relationships between nonammonia-N flow at the omasal canal and milk protein yield. Data were derived from experiments in cattle fed North American diets (n=36) based on alfalfa silage, corn silage, and corn grain and Northern European diets (n=86) composed of grass silage and barley-based concentrates. In all studies, digesta flow was quantified using a triple-marker approach. Linear regressions were used to predict microbial-N flow to the omasum from intake of dry matter (DM), organic matter (OM), or total digestible nutrients. Efficiency of microbial-N synthesis increased with DM intake and there were trends for increased efficiency with elevated dietary concentrations of crude protein (CP) and rumen-degraded protein (RDP) but these effects were small. Regression of omasal rumen-undegraded protein (RUP) flow on CP intake indicated that an average 32% of dietary CP escaped and 68% was degraded in the rumen. The slope from regression of observed omasal flows of RUP on flows predicted by the National Research Council (2001) model indicate...Continue Reading

References

Nov 1, 1992·Journal of Animal Science·J B RussellC J Sniffen
Sep 1, 1974·The British Journal of Nutrition·L D Satter, L L Slyter
Aug 1, 1967·Clinica Chimica Acta; International Journal of Clinical Chemistry·H McCullough
Aug 1, 1997·Journal of Animal Science·E C Titgemeyer
Aug 1, 1997·Journal of Animal Science·D L Harmon, C J Richards
Mar 5, 2003·Journal of Dairy Science·N R St-Pierre
Jul 8, 2003·The British Journal of Nutrition·Seppo AhvenjärviPekka Huhtanen
Jul 1, 2006·Environmental Health and Preventive Medicine·Shun'ichi HondaMineshi Sakamoto

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Citations

Jan 21, 2014·Journal of Dairy Science·R MartineauH Lapierre
Jan 9, 2013·Journal of Dairy Science·R MartineauH Lapierre
Feb 14, 2013·Journal of Dairy Science·M Ramin, P Huhtanen
May 26, 2016·International Journal of Molecular Sciences·Arjan Jonker, Peiqiang Yu
Jul 21, 2015·Journal of Dairy Science·F GiallongoA N Hristov
Jul 28, 2016·Journal of Dairy Science·Yairanex Roman-GarciaJeffrey L Firkins
Nov 22, 2016·Animal : an International Journal of Animal Bioscience·S S NaadlandÅ T Randby
Nov 21, 2017·Journal of Dairy Science·Charles G Schwab, Glen A Broderick
Nov 7, 2017·Journal of Dairy Science·S AhvenjärviP Huhtanen
Sep 11, 2017·Journal of Dairy Science·Rebecca DanielssonPekka Huhtanen
Apr 30, 2019·Journal of Dairy Science·A N HristovZ Yu
Apr 10, 2017·Journal of Dairy Science·E H Cabezas-GarciaP Huhtanen
Dec 15, 2019·Animals : an Open Access Journal From MDPI·Juana C ChagasSophie J Krizsan
May 15, 2021·Journal of Dairy Science·M D HaniganP Kononoff
Jun 29, 2021·Frontiers in Veterinary Science·Stefanie Alvarenga SantosLays Débora Silva Mariz
Aug 26, 2021·Ecology and Evolution·Annika M FeltonDavid Raubenheimer

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