Summary
This 2023 study investigates the mechanistic linkages between soil organic carbon and nitrogen pools and nitrous oxide emissions during land-use conversions in tropical regions. The research suggests that changes in carbon and nitrogen availability regulate both the activity and gene expression of soil microorganisms responsible for N2O production and consumption. The findings contribute to understanding how agricultural intensification or land-use change in the tropics influences greenhouse gas fluxes through shifts in soil biogeochemistry.
UK applicability
Whilst conducted in tropical conditions, the mechanistic principles linking soil C:N ratios to N2O-producing microbial functional genes may inform temperate UK agricultural management, particularly regarding nitrogen fertiliser timing and soil carbon enhancement strategies to mitigate emissions. However, results cannot be directly transposed without accounting for differences in climate, soil type, and microbial community composition.
Key measures
N2O emissions, soil carbon fractions, soil nitrogen fractions, abundance of functional genes (likely amoA, nirK, nosZ), soil microbial community composition
Outcomes reported
The study examined how changes in soil carbon and nitrogen fractions affect nitrous oxide (N2O) emissions and the abundance of functional genes involved in nitrification and denitrification under tropical land-use transitions. Soil microbial communities and their metabolic potential were characterised in relation to greenhouse gas production.
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