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  • Bonner, Mark T. L.Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management (author)

Why does nitrogen addition to forest soils inhibit decomposition?

  • Article/chapterEnglish2019

Publisher, publication year, extent ...

  • Elsevier BV,2019
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:umu-165686
  • https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-165686URI
  • https://doi.org/10.1016/j.soilbio.2019.107570DOI
  • https://res.slu.se/id/publ/102276URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Enrichment of forest soils with inorganic nitrogen (N) tends to inhibit oxidative enzyme expression by microbes and reduces plant litter and soil organic matter decomposition rates. Without further explanation than is currently presented in the scientific literature, we argue that upregulation of oxidative enzymes seems a more competitive response to prolonged N enrichment at high rates than the observed downregulation. Thus, as it stands, observed responses are inconsistent with predicted responses. In this article, we present a hypothesis that resolves this conflict. We suggest that high rates of N addition alter the competitive balance between enzymatic lignin mineralisation and non-enzymatic lignin oxidation. Using metatransciptomics and chemical assays to examine boreal forest soils, we found that N addition suppressed peroxidase activity, but not iron reduction activity (involved in non-enzymatic lignin oxidation). Our hypothesis seems positioned as a parsimonious and empirically consistent working model that warrants further testing.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Castro, DavidSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig genetik och växtfysiologi,Department of Forest Genetics and Plant Physiology (author)
  • Schneider, Andreas N.Umeå universitet,Institutionen för fysiologisk botanik(Swepub:umu)ansc0061 (author)
  • Sundstrom, GorelSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig genetik och växtfysiologi,Department of Forest Genetics and Plant Physiology (author)
  • Hurry, VaughanSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig genetik och växtfysiologi,Department of Forest Genetics and Plant Physiology(Swepub:slu)102936 (author)
  • Street, Nathaniel R.,1979-Umeå universitet,Institutionen för fysiologisk botanik(Swepub:umu)rona0006 (author)
  • Näsholm, TorgnySwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management(Swepub:slu)48242 (author)
  • Sveriges lantbruksuniversitetInstitutionen för skogens ekologi och skötsel (creator_code:org_t)
  • Sveriges lantbruksuniversitet

Related titles

  • In:Soil Biology and Biochemistry: Elsevier BV1370038-07171879-3428

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