ArticleAnimal bioscience2026
Effects of rumen-protected glucose supplementation strategies on growth performance, colonic fermentation, and meat quality in Simmental beef cattle.
Article in Animal bioscience, 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
objectiveThis study was conducted to evaluate the effects of supplementation strategies containing rumen-protected glucose (RPG) on growth performance, colonic fermentation characteristics, bacterial community structure, carcass traits, and meat quality in Simmental beef cattle.
methodsThirty Simmental bulls with an initial body weighing 578.4±14.7 kg were randomly assigned to three dietary treatments for 90 d, with 10 animals per treatment. All animals received the same basal total mixed ration, to which the treatment supplements were added. The treatments were CON, unprotected glucose (150 g/d) plus coating fat (150 g/d); T1, RPG (100 g/d) plus unprotected glucose (100 g/d) and coating fat (100 g/d); and T2, RPG (300 g/d). Growth performance was recorded throughout the trial. At the end of the experiment, colonic digesta were collected for fermentation and bacterial community analyses, and carcass traits and meat quality were evaluated after slaughter.
resultsT1 and T2 exhibited higher average daily gains (ADGs) compared to CON (p<0.05), while feed efficiency differed marginally among treatments (p = 0.049). In colonic digesta, propionate concentrations were higher in T1 and T2 than in CON, and butyrate concentration was higher in T2 than in CON and T1 (p<0.05). Alpha diversity was not affected by treatment; however, unweighted UniFrac-based principal coordinate analysis showed differences in the overall colonic bacterial community structure among treatments. At the phylum and genus levels, several taxa showed nominal differences based on raw p values, but these were not retained after false discovery rate correction. Hot carcass weight and meat weight were greater in T1 and T2 than in CON (p<0.05). Intramuscular fat content was higher in T2 than in CON (p<0.05), whereas most other meat quality traits were not significantly affected.
conclusionUnder the conditions of this study, the supplementation strategies containing RPG were associated with increased overall ADG, hot carcass weight, and meat weight in Simmental beef cattle. These strategies were also associated with higher colonic propionate and butyrate levels, indicating changes in hindgut fermentation. The higher-RPG strategy (T2) was associated with increased intramuscular fat content.
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