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Winery by‑products as a feed source with functional properties:dose–response effect of grape pomace,grape seed meal,and grape seed extract on rumen microbial community and their fermentation activity in RUSITEC

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Journal of Animal Science and Biotechnology 2023年第6期14卷 2439-2453页

作者： Ratchaneewan Khiaosa‑ard Mubarik Mahmood Elsayed Mickdam catia pacifico Julia Meixner Laura‑Sophie Traintinger Institute of Animal Nutrition and Functional Plant Compounds Department for Farm Animals and Veterinary Public HealthUniversity of Veterinary Medicine ViennaVeterinaerplatz 11210 ViennaAustria. Animal Nutrition Section Department of Animal SciencesSub Campus JhangUniversity of Veterinary and Animal Sciences12 Km Chiniot RoadJhang 35200LahorePakistan. Nutrition and Clinical Nutrition Department Faculty of Veterinary MedicineSouth Valley UniversityQena 83523Egypt. Present address:Biome Diagnostics GmbH ViennaAustria.

Background Grape and winery by-products have nutritional values for cattle and also contain functional compounds like phenols,which not only bind to protein but can also directly affect microbiota and their function in the *** characterized the nutritional and functional effects of grape seed meal and grape pomace as well as an effective dosage of grape phenols on ruminal microbiota and fermentation characteristics using a rumen simulation *** Six diets(each n=8)were compared including a control diet(CON,no by-product),a positive control diet(EXT,CON+3.7%grape seed extract on a dry matter(DM)basis),two diets with grape seed meal at 5%(GS-low)and 10%(GS-high),and two diets with grape pomace:at 10%(GP-low)and 20%(GP-high),on a DM *** inclusion of the by-product supplied total phenols at 3.4%,0.7%,1.4%,1.3%,and 2.7%of diet DM for EXT,GS-low,GS-high,GP-low,and GP-high,*** were tested in four experimental *** treatments decreased ammonia concentrations and the disappearances of DM and OM(P<0.05)compared to *** and GP-high lowered butyrate and odd-and branch-chain short-chain fatty acids while increased acetate compared to CON(P<0.05).Treatments did not affect methane *** decreased the abundance of many bacterial genera including those belonging to the core ***-high and EXT consistently decreased Olsenella and Anaerotipes while increased Ruminobacter *** The data suggest that the inclusion of winery by-products or grape seed extract could be an option for reducing excessive ammonia *** to grape phenols at a high dosage in an extract form can alter the rumen microbial ***,however,does not necessarily alter the effect of grape phenols on the microbial community function compared to feeding high levels of winery *** suggests the dominant role of dosage over the form or source of the grape phenols in affecting ruminal microbial *** conclusion,

关键词： Functional feed Grape pomace Grape seed Protein degradation Rumen microbiota

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