Nitrous Oxide Dynamics in Agricultural Peat Soil in Response to Availability of Nitrate, Nitrite, and Iron Sulfides

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Drained agricultural peat soils are potential hot spots of nitrous oxide (N2O) emissions, but the biogeochemical basis for distinctively large emissions is still unclear. Incubation experiments with acidic bog peat, using nitrate (NO3-), nitrite (NO2-), synthetic iron monosulfide (FeS), and ground natural pyrite (FeS2), suggested that heterotrophic denitrification of nitrate and nitrite was a major potential source of N2O in the peat soil. Neither FeS nor FeS2 amendment affected N2O production and therefore high production potentials of N2O were not a result of interactions between N oxyanions and iron sulfides, such as chemolithoautotrophic pyrite oxidation.

OriginalsprogEngelsk
TidsskriftGeomicrobiology Journal
Vol/bind37
Nummer1
Sider (fra-til)76-85
Antal sider10
ISSN0149-0451
DOI
StatusUdgivet - 2 jan. 2020

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