Summary
This study investigates the feasibility of substituting conventional silage with pelleted corn stover in breeding cow diets, with emphasis on rumen microbial community shifts and systemic metabolic consequences. By combining rRNA sequencing and untargeted serum metabolomics, the authors characterised both the mechanistic (microbial) and physiological (metabolomic) responses to this feed substitution. The findings may inform strategies for sustainable cattle feeding through agricultural residue utilisation.
UK applicability
Corn stover utilisation is less established in UK livestock systems compared to maize silage, though the findings could be relevant to farms exploring cereal straw-based feed innovations and circular agriculture. The study's insights on rumen microbiota responses to varied fibrous substrates may have relevance for UK beef and dairy producers exploring alternative or waste-stream forages within sustainable feeding systems. Direct applicability may be limited by differences in forage availability, existing feed systems, and climate.
Key measures
Rumen microbiota diversity and composition (16S rRNA sequencing); serum metabolome profiles (metabolomics); microbial diversity indices; metabolic biomarkers; relative abundance of key microbial taxa.
Outcomes reported
The study examined changes in rumen microbial community composition and serum metabolite profiles in breeding cows when a proportion of their silage ration was replaced with corn stover pellets, reporting shifts in microbial diversity indices, specific bacterial taxa abundance, and associated metabolomic changes in blood serum.
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