The effects of a ration change from a total mixed ration to pasture on rumen fermentation, volatile fatty acid absorption characteristics, and morphology of dairy cows

Journal of Dairy Science
M SchärenSven Dänicke

Abstract

To investigate the effect of the change from a concentrate and silage-based ration (total mixed ration, TMR) to a pasture-based ration, a 10-wk trial (wk 1-10) was performed, including 10 rumen- and duodenum-fistulated German Holstein dairy cows (182±24 d in milk, 23.5±3.5kg of milk/d; mean ± standard deviation). The cows were divided in either a pasture group (PG, n=5) or a confinement group (CG, n=5). The CG stayed on a TMR-based ration (35% corn silage, 35% grass silage, 30% concentrate; dry matter basis), whereas the PG was gradually transitioned from a TMR to a pasture-based ration (wk 1: TMR only; wk 2: 3 h/d on pasture wk 3 and 4: 12 h/d on pasture wk 5-10: pasture only). Ruminal pH, volatile fatty acids (VFA), NH3-N, and lipopolysaccharide (LPS) concentrations were measured in rumen fluid samples collected medially and ventrally on a weekly basis. Ruminal pH was continuously recorded during 1 to 4 consecutive days each week using ruminal pH measuring devices. In wk 1, 5, and 10, rumen contents were evacuated and weighed, papillae were collected from 3 locations in the rumen, and subsequently a VFA absorption test was performed. In the PG, mean rumen pH and molar acetate proportions decreased, and molar butyrate proporti...Continue Reading

References

Jun 1, 1993·Zentralblatt für Veterinärmedizin. Reihe A·G GäbelH Martens
May 16, 2001·Science·J B Russell, J L Rychlik
Jun 28, 2002·Journal of Dairy Science·E S Kolver, M J de Veth
Oct 29, 2002·Animal Health Research Reviews·G GäbelF Müller
Sep 26, 2003·The Proceedings of the Nutrition Society·Eric S Kolver
Sep 21, 2004·Journal of Dairy Science·H Z TaweelS Tamminga
Sep 9, 2006·Journal of Dairy Science·P J Kononoff, K J Hanford
Jul 20, 2007·Journal of Dairy Science·O AlZahalB W McBride
Dec 22, 2007·Journal of Dairy Science·E BramleyN D Costa
Mar 11, 2008·The Veterinary Journal·Luke O'GradyFinbar J Mulligan
Jul 22, 2009·Journal of Dairy Science·A L LegrandD M Weary
Apr 1, 2011·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Michael A SteeleBrian W McBride
Jun 16, 2011·FEMS Microbiology Ecology·Alexandre B de MenezesEvelyn M Doyle
Jul 1, 2010·Animal : an International Journal of Animal Bioscience·E E ConnorC Li
Jan 1, 2013·Annual Review of Animal Biosciences·Lance H Baumgard, Robert P Rhoads

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Citations

Feb 7, 2020·Animal : an International Journal of Animal Bioscience·J DijkstraA Bannink
May 15, 2020·Animals : an Open Access Journal From MDPI·Mirco CorazzinStefano Bovolenta
Mar 27, 2021·NPJ Biofilms and Microbiomes·Fabian BillenkampSven Dänicke

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