Cited by 11Soil Carbon and Nitrogen DynamicsSoil erosion and sediment transportSoil and Environmental Studies

Evaluation of Soil14C Data for Estimating Inert Organic Matter in the Rothc Model

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Rethemeyer, Janet, Grootes, Pieter M, Brodowski, Sonja, Ludwig, Bernard·2007·Radiocarbon

Abstract

Changes in soil organic carbon stocks were simulated with the Rothamsted carbon (RothC) model. We evaluated the calculation of a major input variable, the amount of inert organic matter (IOM), using measurable data. Three different approaches for quantifying IOM were applied to soils with mainly recent organic matter and with carbon contribution from fossil fuels: 1) IOM estimation via total soil organic carbon (SOC); 2) through bulk soil radiocarbon and a mass balance; and 3) by quantifying the portion of black carbon via a specific marker. The results were highly variable in the soil containing lignite-derived carbon and ranged from 8% to 52% inert carbon of total SOC, while nearly similar amounts of 5% to 8% were determined in the soil with mainly recent organic matter. We simulated carbon dynamics in both soils using the 3 approaches for quantifying IOM in combination with carbon inputs derived from measured crop yields. In the soil with recent organic matter, all approaches gave a nearly similar good agreement between measured and modeled data, while in the soil with a fossil carbon admixture, only the 14 C approach was successful in matching the measured data. Although 14 C was useful for initializing RothC, care should be taken when interpreting SOC dynamics in soils containing carbon from fossil fuels, since these reflect the contribution from both natural and anthropogenic carbon sources.

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  • It has never been proven experimentally that a multi-pool chain model can represent the decreasing decomposition of residues due to chemical and physical protection.

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Research works printed but not linked: 4

  1. Falloon PD, Smith P. 2000. Modelling refractory organic matter. Biology and Fertility of Soils 30(5-6):388-98.
  2. John B. 2003. Carbon turnover in aggregated soils deter- mined by natural 13 C abundance [PhD dissertation]. Göttingen: University of Göttingen.
  3. Merbach L, Graz J, Schliephake W, Stumpe H, Schmidt L. 2000. The long-term fertilization experiments in Halle (Salle), Germany-introduction and survey. Journal of Plant Nutrition and Soil Science 163(6): 629-38.
  4. Smith P, Smith JU, Powlson DS, McGill WB, Arah JRM, Chertov OG, Coleman K, Franko U, Frolking S, Jen- https://doi.org/10.1017/S0033822200042934 Published online by Cambridge University Press

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Authors
Rethemeyer, J., Grootes, P. M., Brodowski, S., & Ludwig, B.
Affiliations
  • University of Kassel (DE)
  • Christian-Albrechts-Universität zu Kiel (DE)
  • University of Bonn (DE)
Corresponding author
Rethemeyer, Janet
Venue
Radiocarbon
Published
2007
Volume
49
Issue
2
Pages
1079-1091
ISSN
  • 0033-8222 (ISSN-L)
  • 1945-5755
OpenAlex
W2111494348
Cited by
11
References
50
Citations by year
2016: 1 · 2015: 3 · 2013: 1 · 2012: 2
FWCI
1.09
Type
journal article
Language
en
Open access
Locations
  • Radiocarbon (publishedVersion)
  • Helmholtz-Zentrum für Polar-und Meeresforschung (Alfred-Wegener-Institut) (acceptedVersion)
  • UA Campus Repository (The University of Arizona) (acceptedVersion)
Funders
Deutsche Forschungsgemeinschaft
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil erosion and sediment transport
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil and Environmental Studies
Keywords
soil organic carbon, RothC model, black carbon, mass balance, model initialization

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