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Publication - Professor Penny Johnes

    Short-term biotic removal of dissolved organic nitrogen (DON) compounds from soil solution and subsequent mineralisation in contrasting grassland soils

    Citation

    Carswell, AM, Hill, P, Jones, D, Blackwell, M, Johnes, PJ & Chadwick, D, 2016, ‘Short-term biotic removal of dissolved organic nitrogen (DON) compounds from soil solution and subsequent mineralisation in contrasting grassland soils’. Soil Biology and Biochemistry, vol 96., pp. 82-85

    Abstract

    Cycling of low molecular weight dissolved organic nitrogen compounds
    constitutes an important component of soil organic matter turnover in
    soils. We determined how rapidly grassland soils can cycle urea,
    compared to the amino acid l-alanine, and the peptide l-trialanine. Using naturally occurring concentrations of 14C-labelled
    compounds the rates of removal from soil solution and subsequent
    mineralisation were measured. Biotic removal of all three compounds and
    subsequent mineralisation to CO2 occurred within minutes.
    This research has demonstrated, for the first time, the potential for
    rapid removal of urea at low concentrations by the soil microbial
    biomass.

    Full details in the University publications repository