Cited by 2,511Soil Carbon and Nitrogen DynamicsMycorrhizal Fungi and Plant InteractionsMicrobial Community Ecology and Physiology

Nitrogen mineralization: Challenges of a changing paradigm

Schimel, Joshua P., Bennett, Jennifer·2004·Ecology

Abstract

Until recently, the common view of the terrestrial nitrogen cycle had been driven by two core assumptions—plants use only inorganic N and they compete poorly against soil microbes for N. Thus, plants were thought to use N that microbes “left over,” allowing the N cycle to be divided cleanly into two pieces—the microbial decomposition side and the plant uptake and use side. These were linked by the process of net mineralization. Over the last decade, research has changed these views. N cycling is now seen as being driven by the depolymerization of N-containing polymers by microbial (including mycorrhizal) extracellular enzymes. This releases organic N-containing monomers that may be used by either plants or microbes. However, a complete new conceptual model of the soil N cycle needs to incorporate recent research on plant–microbe competition and microsite processes to explain the dynamics of N across the wide range of N availability found in terrestrial ecosystems. We discuss the evolution of thinking about the soil N cycle, propose a new integrated conceptual model that explains how N cycling changes as ecosystem N availability changes, and discuss methodological issues raised by the changing paradigm of terrestrial N cycling.

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Crossref · 10.1890/03-8002

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  • Mineralization of organic N provides inorganic-N and this is the cause of increased yields seen under manure derived biochars.

    “Given the fact that plants can assimilate organic N compounds [44], and that mineralization of organic N also provides inorganic-N, it can be inferred to be the cause of increased yields seen under manure derived biochars.”

    From A Review of Biochar and Soil Nitrogen Dynamics (2013) · cites this paper as [44]

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Authors
Schimel, J. P., & Bennett, J.
Affiliations
  • University of California, Santa Barbara (US)
  • North Carolina State University (US)
Corresponding author
Schimel, Joshua P.
Venue
Ecology
Publisher
Wiley
Published
2004-03
Volume
85
Issue
3
Pages
591-602
ISSN
0012-9658 (ISSN-L)
OpenAlex
W2139610873
Cited by
2,511
References
114
Citations by year
2026: 133 · 2025: 138 · 2024: 113 · 2023: 128 · 2022: 192 · 2021: 156 · 2020: 146 · 2019: 149 · 2018: 151 · 2017: 117 · 2016: 132 · 2015: 94 · 2014: 110 · 2013: 114 · 2012: 93
FWCI
100.06
Type
journal article
Language
en
Open access
closed
Locations
Ecology (publishedVersion)
Funders
National Science Foundation
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Mycorrhizal Fungi and Plant Interactions
  • Physical Sciences › Environmental Science › Ecology › Microbial Community Ecology and Physiology
Keywords
nitrogen mineralization, soil nitrogen cycling, extracellular enzymes, net mineralization, nitrogen availability, terrestrial ecosystems

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