ArticleVeterinary medicine and science2026
Effects of Diet Composition and Yeast Cell Wall Supplementation on Ruminal Fermentation, Gas Kinetics, Methane Production and Digestibility Assessed In Vitro Using Gas Production and Daisy
Article in Veterinary medicine and science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundOptimizing ruminant diets and mitigating methane emissions using feed additives like yeast cell wall is of growing significance in animal nutrition.
objectivesThe present study aimed to evaluate the effects of varying roughage-to-concentrate (R:C) ratios and yeast cell wall (YCW) supplementation on rumen fermentation, gas kinetics and methane (CH
methodsBoth systems employed the same rumen inoculum. A 3 × 2 factorial design was used, involving three different R:C ratios with or without YCW supplementation. The diets were formulated as total mixed rations, comprising roughages (wheat straw, vetch hay in equal proportions) and a concentrate mix at ratios of 30R:70C, 50R:50C and 70R:30C. A YCW supplement containing ∼40% crude protein, a minimum of 18% of mannan-oligosaccharides and 18% of β-glucans was added at 1.25 g kg
resultsThe results showed that cumulative (48 h) and asymptotic GP did not differ among diets with varying R:C ratios. The 30R:70C diet showed a significantly higher gas rate constant and longer lag time than the other diets. YCW supplementation significantly reduced total and asymptotic GP and increased lag time. Significant R:C × YCW interactions were observed for GP and gas rate constant, as well as for 24 h CH
conclusionsOverall, YCW supplementation reduced total gas and CH
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