Randomized trial evaluates effects of soil amendments on methane emissions in paddy soil, suggesting ways to mitigate greenhouse gases.
Key Points
This research aims to evaluate how different soil amendments affect methane emissions from paddy soils.
Conducted an anaerobic microcosm experiment with various amendments: microbial inoculants, biochar, humic acid, and montmorillonite.
Analyzed changes in soil properties such as pH, electrical conductivity, and acetate concentration, along with microbial community structure.
Investigated functional genes related to methane cycling, specifically mcrA and pmoA.
Microbial inoculants significantly affected methane emissions; Chabeijian increased emissions by 100.8%, while Duojun-360 reduced them by 57.1%.
Chabeijian's effect was linked to greater acetate turnover and an increase in key methanogenic taxa, while Duojun-360 decreased mcrA abundance by 26.9%.
Both inoculants increased methanotroph abundance but methane production remained the primary factor influencing net methane emissions.