Summary
This study investigates the potential of grape pomace — a winery by-product — as a feed ingredient in complete pellet rations for beef cattle, examining its effects on production efficiency, meat or tissue fatty acid profiles, and rumen mycobiome composition. By incorporating a polyphenol-rich agri-food waste stream into livestock diets, the research addresses both feed resource utilisation and potential modulation of rumen microbial ecology. The findings likely offer evidence that grape pomace inclusion can influence rumen fungal populations and may modify the fatty acid composition of beef, with implications for both animal performance and product quality.
UK applicability
While conducted in China and reflecting Chinese feedlot conditions, the findings are broadly relevant to UK beef producers and researchers interested in valorising winery by-products as alternative feed ingredients; the UK wine industry is growing and grape pomace utilisation in ruminant diets aligns with circular economy goals promoted under UK agricultural policy.
Key measures
Average daily gain (kg/day); feed conversion ratio; fatty acid composition (% of total fatty acids, including omega-3 and omega-6); rumen fungal diversity indices (e.g. Shannon index, OTU richness); relative abundance of fungal taxa
Outcomes reported
The study measured growth performance indicators (e.g. average daily gain, feed conversion ratio), fatty acid profiles in meat or tissue, and rumen fungal community composition in beef cattle fed grape pomace complete pellet feed. It likely compared a grape pomace-supplemented diet against a conventional control diet.
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