| Title: | Processing barley grain with lactic acid and tannic acid ameliorates rumen microbial fermentation and degradation of dietary fibre in vitro |
| Author(s): | Deckardt K; Metzler-Zebeli BU; Zebeli Q; |
| Address: | "Institute of Animal Nutrition and Functional Plant Compounds, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, Veterinaerplatz 1, 1210, Vienna, Austria. University Clinic for Swine, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, Veterinaerplatz 1, 1210, Vienna, Austria" |
| ISSN/ISBN: | 1097-0010 (Electronic) 0022-5142 (Linking) |
| Abstract: | "BACKGROUND: Cereal grains are important ingredients of ruminant diets, but their rapid degradation seriously impairs rumen fermentation and the host's health. The goal of this study was to evaluate whether processing of barley grain with 1 or 5% lactic acid (LA) and 1 or 5% tannic acid (TA), without or with an additional heat treatment (1% LAH or 1% TAH), may affect microbial ruminal abundance, fermentation profile, and nutrient degradation in vitro. RESULTS: Processing with LA lowered (P < 0.05) the concentration of short-chain fatty acids (SCFAs), proportions of branched-chain SCFA, and the acetate-to-propionate ratio. Treatment with 1% TAH and 1% LAH lowered (P < 0.05) gene copy numbers of total protozoa, rumen lipopolysaccharide, and degradation of crude protein, and tended (P = 0.08) to lower the proportion of the genus Prevotella. Treatment of barley grain with 1% LA or 1% LAH stimulated Clostridium cluster XIV. Degradation of fibre was enhanced (P < 0.05) by all LA and TA treatments. CONCLUSION: Chemical and heat treatment of barley grain modulated the ruminal fermentation profile and enhanced fibre degradation; however, processing of grain with LA seems to be superior because this effect was not associated with a concomitant depression in ruminal degradation of organic matter" |
| Keywords: | "Animal Feed Animals Clostridium/growth & development Diet/veterinary Dietary Fiber/*metabolism Dietary Proteins/metabolism Digestion Edible Grain/*chemistry Fatty Acids, Volatile/metabolism *Fermentation Food Handling/methods Gastrointestinal Microbiome *;" |
| Notes: | "MedlineDeckardt, Kathrin Metzler-Zebeli, Barbara U Zebeli, Qendrim eng Research Support, Non-U.S. Gov't England 2015/01/15 J Sci Food Agric. 2016 Jan 15; 96(1):223-31. doi: 10.1002/jsfa.7085. Epub 2015 Feb 6" |
