Summary
This microcosm study demonstrates that arbuscular mycorrhizal fungal hyphae from intercropped maize can substantially reduce nitrous oxide emissions from decomposing soybean residues in maize/soybean intercropping systems. The mitigation mechanism operates primarily through enrichment and compositional shifts in N₂O-consuming (nosZ-type) denitrifier communities, with secondary effects on other nitrifying and denitrifying microbial groups. The findings suggest practical potential for greenhouse gas mitigation through deliberate management of efficacious AMF in cereal–legume intercropping systems.
Regional applicability
This study was conducted in China and focuses on maize–soybean intercropping systems common in East Asia. Direct applicability to United Kingdom farming is limited, as UK cereal–legume rotation systems and climate conditions differ significantly; however, the underlying microbial mechanisms and AMF-mediated greenhouse gas mitigation principles may inform UK research into legume integration and soil microbiome management for emissions reduction.
Key measures
N₂O emissions (%), abundance and community composition of nosZ-type and nirK-type denitrifiers, ammonia-oxidising bacteria (AOB), microbial biomass carbon (MBC), dissolved organic carbon (DOC)
Outcomes reported
The study measured N₂O emissions from soybean stubbles and quantified changes in soil microbial communities (nitrifiers and denitrifiers) in response to arbuscular mycorrhizal fungal hyphae from intercropped maize. Results showed that AMF hyphae reduced overall N₂O emissions by 20.8%–61.5% through promotion of N₂O-consuming nosZ-type denitrifiers.
Topic tags
Dig deeper with Pulse AI.
Pulse AI has read the whole catalogue. Ask about this record, its theme, or how the findings apply to UK farming and policy — every answer cites the underlying studies.