Potential of silage inoculants to mitigate methane production from the rumen: A systematic review

Resumo original em inglês

O que aconteceu

Methane (CH4) emissions from enteric fermentation in ruminants represent the largest source of anthropogenic agricultural emissions, contributing significantly to global CH4 levels. Enteric CH4 mitigation strategies have been intensively investigated to address the detrimental effects on climate change and ruminant production characteristics. This systematic review investigated whether microbial silage inoculants could reduce CH4 formation in the rumen microbiome, both ex vivo and in vivo, based on available literature. Two independent reviewers conducted a comprehensive search for peer-reviewed articles, without year restrictions, up to January 31, 2024. The search focused on studies reporting CH4 gas production both in vitro and in vivo. Of 434 articles initially identified, only 10 met the quality criteria and were included in the analysis. Among the selected studies, 9 measured CH4 production using in vitro assays, whereas one reported an in vivo trial. The majority of the experiments (70%) were conducted using cattle rumen samples, including the in vivo study involving cattle, the remainder of the experiments used rumen samples obtained from sheep. Ten bacterial species were used as inoculants across the selected studies. Lactobacillus buchneri, used in combination with additives, achieved the highest CH4 reduction at 83%. Lactiplantibacillus plantarum also showed a significant reduction in CH4 output, achieving a 48% decrease. Overall, 80% of the reviewed studies reported a reduction in CH4 production by ruminant microorganisms following the application of silage microbial inoculants. These findings suggest that silage microbial inoculants hold promise as a strategy to mitigate CH4 emissions in livestock. The limited number of studies highlights the need for further research to confirm these results and explore wider applications.

Resumo publicado sob licença CC BY. A tradução para o português ainda não chegou a este estudo.