Effects of grain, fructose, and histidine on ruminal pH and fermentation products during an induced subacute acidosis protocol

Journal of Dairy Science
H M GolderI J Lean

Abstract

The effects of grain, fructose, and histidine on ruminal pH and fermentation products were studied in dairy cattle during an induced subacute acidosis protocol. Thirty Holstein heifers were randomly allocated to 5 treatment groups: (1) control (no grain); (2) grain [fed at a crushed triticale dry matter intake (DMI) of 1.2% of body weight (BW)]; (3) grain (0.8% of BW DMI)+fructose (0.4% of BW DMI); (4) grain (1.2% of BW DMI)+histidine (6 g/head); and (5) grain (0.8% of BW DMI)+fructose (0.4% of BW DMI)+histidine (6 g/head) in a partial factorial arrangement. Heifers were fed 1 kg of grain daily with ad libitum access to ryegrass silage and alfalfa hay for 10 d. Feed was withheld for 14 h before challenge day, on which heifers were fed 200 g of alfalfa hay and then the treatment diets immediately thereafter. Rumen samples were collected 5 min after diet ingestion, 60 min later, and at 3 subsequent 50-min intervals. Grain decreased ruminal pH and increased ammonia, total volatile fatty acid (VFA), acetate, butyrate, propionate, and valerate concentrations compared with controls. The addition of grain had no effect on ruminal D- and L-lactate concentrations. Fructose markedly decreased ruminal pH and markedly increased D- and L-la...Continue Reading

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Citations

Jul 3, 2013·The Veterinary Clinics of North America. Food Animal Practice·Ian J LeanPeter J Degaris
May 6, 2014·Journal of Dairy Science·C F Vargas-RodriguezB J Bradford
Jan 31, 2017·Journal of Dairy Science·Roni Yair, Michael S Allen
Dec 15, 2015·Frontiers in Veterinary Science·P Celi, Gianfranco Gabai
Oct 4, 2016·Journal of Animal Science·M J CallaghanV E A Perry
Jul 7, 2020·EFSA Journal·EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP)Fabiola Pizzo
Mar 14, 2017·Journal of Animal Science and Biotechnology·Essi Evans, Ulrike Messerschmidt
Apr 2, 2018·Journal of Dairy Science·R M RodneyI J Lean
Jul 7, 2020·EFSA Journal·EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP)Fernando Ramos

Related Concepts

Metabolic Acidosis
Ammonia
Bos indicus
Cattle Diseases
Triticale
Diet
Fatty Acids, Volatile
Fermentation
Levulosa Ife
Ceplene

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