Modelling refractory soil organic matter

P D Falloon, Pete Smith

Research output: Contribution to journalLiterature review

116 Citations (Scopus)

Abstract

Most models for the turnover of soil organic matter (SOM) include a compartment that is either considered inert, or has a very slow turnover time (refractory SOM; RSOM), The RSOM content of soils varies markedly between sites, and knowledge of its size and variability are essential for determining whether soils behave as sources or sinks of atmospheric CO2, It has also been suggested that the accurate specification of RSOM pools is essential to modelling studies, and that uncertainty in estimates of the size of RSOM pool could be a major source of error in modelling soil organic C, In this paper, current SOM models are reviewed, and approaches to modelling RSOM and its significance are discussed. Simulations of SOM turnover for the Rothamsted Broadbalk winter wheat experiment using the Rothamsted C model and CENTURY are presented as examples.

Original languageEnglish
Pages (from-to)388-398
Number of pages11
JournalBiology and Fertility of Soils
Volume30
Issue number5-6
DOIs
Publication statusPublished - Mar 2000

Keywords

  • refractory soil organic matter
  • carbon
  • modelling
  • carbon dioxide sources
  • carbon dioxide sinks
  • Rothamsted-carbon-model
  • New-Zealand
  • Theoretical-Analysis
  • Nitrogen dynamics
  • turnover model
  • climate-change
  • forest soils
  • annual input
  • radiocarbon
  • simulation

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