ArticleFrontiers in microbiology2026
Effects of different protein sources on rumen fermentation-microbial characteristics, nutrient utilization, and fecal and urinary metabolites in periparturient breeding cows.
Article in Frontiers in microbiology, 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
Introduction: As a core nutrient regulating ruminant metabolic networks, immune homeostasis, and rumen microbial community structure, the source and supply of protein influence the adaptive capacity of breeding cows to metabolic stress during physiological transitions in the peripartum period. Methods: Sixty healthy, periparturient cows with similar body weights (573.14 ± 76.67 kg) and gestation lengths (228.77 ± 37.86 d) were selected and randomly divided into four groups ( Results: (1) pH levels in the TG2 increased significantly at 30 days postpartum (PP30 d), peptidyltransferase (PLT) counts in the TG2 and TG3 were significantly higher than those in the CG and TG1 at calving day (0 d); Proteolytic enzymes (Pro), urease (URE), and PLT levels in the TG3 increased significantly at PP30 d; beneficial bacteria such as Discussion: The rapeseed meal group caused excessive protein fermentation, leading to the production of endogenous mycotoxins and triggering oxidative stress and metabolic burden. The sunflower meal group exhibited elevated levels of intestinal toxins and permeability markers, which impaired reproductive performance. The linseed cake group maintains ruminal fermentation and intestinal metabolism in cows, making it a high-quality protein source for feeding periparturient breeding cows as a substitute for soybean meal.
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