Summary
This 2025 field study investigated how partial substitution of mineral nitrogen fertiliser with Bacillus velezensis SQR9 inoculant affects nitrogen oxide emissions in tropical vegetable systems. The findings suggest that combining reduced synthetic fertiliser with beneficial bacterial inoculation can lower greenhouse gas emissions whilst maintaining vegetable production. The work contributes to understanding microbial management as a climate mitigation strategy in high-input horticulture.
UK applicability
Tropical vegetable production systems differ substantially from UK temperate horticulture in climate, soil type and agronomic practice; direct transfer of findings would require validation. However, the principle of microbial inoculant-mediated fertiliser reduction and emission mitigation may have relevance to UK intensive vegetable growers seeking to lower their nitrogen footprint, subject to local soil and climatic adaptation.
Key measures
Nitrogen-oxide emissions (likely N₂O and/or NOx flux); fertiliser application rates; soil microbial community composition or activity (as suggested by Bacillus inoculant focus)
Outcomes reported
The study measured nitrogen-oxide (NOx) emissions from tropical vegetable fields under different fertiliser regimes, comparing conventional mineral fertiliser application with reduced fertiliser plus Bacillus velezensis SQR9 inoculant.
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