Arbuscular Mycorrhizal Fungi Shift Soil Bacterial Community Composition and Reduce Soil Ammonia Volatilization and Nitrous Oxide Emissions

Summary

This 2023 study investigates the mechanisms by which arbuscular mycorrhizal fungi colonisation modulates soil bacterial communities to reduce two significant sources of agricultural nitrogen loss: ammonia volatilisation and nitrous oxide emissions. As suggested by the title, AMF-induced shifts in bacterial community structure appear associated with suppressed nitrogen loss pathways, potentially via altered nitrifier and denitrifier activity. The findings suggest a pathway through which mycorrhizal symbiosis could reduce both direct nutrient loss and indirect climate impacts in managed soils.

Regional applicability

The study was conducted in China and used controlled experimental conditions, so direct transfer to United Kingdom field conditions should be cautious. However, the mechanisms underlying AMF-bacterial interactions and nitrogen cycling are likely relevant across temperate agricultural systems; UK soils support diverse AMF communities, and the underlying microbial processes are universal. Applicability would depend on soil type, cropping system, and local AMF community composition.

Key measures

Soil bacterial community composition (16S rRNA sequencing), ammonia volatilisation rates, nitrous oxide emissions, microbial diversity indices, functional genes involved in nitrogen transformation

Outcomes reported

The study examined how arbuscular mycorrhizal fungi (AMF) inoculation alters soil bacterial community composition and reduces ammonia volatilisation and nitrous oxide emissions. Microbial community structure, diversity, and functional gene expression related to nitrogen cycling were measured under controlled conditions.

Topic tags