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  • Ammonia-oxidizing bacteria are the primary N2Oproducers in an ammonia-oxidizing archaea dominatedalkaline agricultural soil
    Meinhardt, Kelley A. ...
    Most agricultural N2O emissions are a consequenceof microbial transformations of nitrogen (N) fertilizer,and mitigating increases in N2O emission will dependon identifying microbial sources and ... variablesinfluencing their activities. Here, using controlledmicrocosm and field studies, we found that syntheticN addition in any tested amount stimulated the pro-duction of N2O from ammonia-oxidizing bacteria(AOB), but not archaea (AOA), from a bioenergy cropsoil. The activities of these two populations were dif-ferentiated by N treatments, with abundance andactivity of AOB increasing as nitrate and N2O produc-tion increased. Moreover, as N2O productionincreased, the isotopic composition of N2O was con-sistent with an AOB source. Relative N2Ocontributions by both populations were quantifiedusing selective inhibitors and varying N availability.Complementary field analyses confirmed a positivecorrelation between N2O flux and AOB abundancewith N application. Collectively, our data indicate thatAOB are the major N2O producers, even with low Naddition, and that better-metered N application, com-plemented by selective inhibitors, could reduceprojected N2O emissions from agricultural soils.
    Vir: Environmental microbiology. - ISSN 1462-2912 (Vol. 20, issue 6, 2018, str. 2195-2206)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2018
    Jezik - angleški
    COBISS.SI-ID - 103928067

    Povezava(-e):

    https://sfamjournals.onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.14246
    DOI

vir: Environmental microbiology. - ISSN 1462-2912 (Vol. 20, issue 6, 2018, str. 2195-2206)
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