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Cited by 1,590Soil Carbon and Nitrogen DynamicsSoil erosion and sediment transportSoil and Unsaturated Flow

The DOI matches its Crossref record; 279 of the 279 references it cites were found in a registry or an index.

SOM fractionation methods: Relevance to functional pools and to stabilization mechanisms

von Lützow, Margit, Kögel-Knabner, Ingrid, Ekschmitt, Klemens, Flessa, Heinz, Guggenberger, Georg, Matzner, Egbert, Marschner, Bernd·2007·Soil Biology and Biochemistry
DOI 10.1016/j.soilbio.2007.03.007
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Abstract

Soil organic matter (SOM) consists of various functional pools that are stabilized by specific mechanisms and have certain turnover rates. For the development of mechanistic models that predict changes in SOM storage, these pools have to be quantified and characterized. In the past, numerous fractionation schemes have been developed to separate and analyse such SOM fractions. In this review, the SOM fractions obtained with such operational fractionation procedures are described in terms of their pool sizes, chemical properties, and turnover rates. The main objective of this review is to evaluate these operationally defined fractions with respect to their suitability to describe functional SOM pools that could be used to parameterize SOM turnover models. Fractionation procedures include (1) physical separation of SOM into aggregate, particle size, and density fractions and fractions according to their magnetic susceptibility, and (2) various wet chemical procedures that fractionate SOM according to solubility, hydrolysability, and resistance to oxidation or by destruction of the mineral phase. Furthermore, combinations of fractionation methods are evaluated. The active SOM pool with turnover rates <10 years may best be represented by the soil microbial biomass and the light fraction (<1.6-2 g cm-3) obtained by density fractionation (if black carbon contents are considered). Most chemical and physical fractionations as well as combinations of methods yield SOM fractions that are not homogeneous in terms of turnover rates. It has proven to be particularly difficult to isolate functional fractions that represent the passive model pools in which the majority of soil SOM is stabilized. The available fractionation methods do not correspond to specific stabilization mechanisms and hence do not describe functional SOM pools. Another problem is that comprehensive data for turnover rates and data for whole soil profiles are only now becoming available, especially for new fractionation methods. Such information as well as the use of specific markers and compound-specific isotope analysis may be important for future differentiation and evaluation of functional SOM fractions.

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Research works printed but not linked: 4

  1. Goering, H.K., van Soest, P.J., 1970. Forage fibre analyses (apparatus, reagent, procedure and some applications). In: USDA, (Ed.). Agricultural Handbook, vol. 379, Washington, pp. 1–19.
  2. Kaiser, 2002, Stabilization of organic matter by soil minerals—investigations of density and particle-size fractions from two acid forest soils, Journal of Plant Nutrition and Soil Science, 165, 451, 10.1002/1522-2624(200208)165:4<451::AID-JPLN451>3.0.CO;2-B · DOI
  3. Schulz, 1990, Die heißwasserexrahierbare C-Fraktion als Kenngröße zur Einschätzung des Versorgungszustandes der Böden mit organischer Substanz (OS), Tagungsberichte der Akademie der Landwirtschaftswissenschaften, Berlin, 295, 269
  4. Vanyushina, 2003, Organic–mineral interactions in soils: a review, Eurasian Soil Science, 36, 379

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Metadata

Authors
von Lützow, M., Kögel-Knabner, I., Ekschmitt, K., Flessa, H., Guggenberger, G., Matzner, E., & Marschner, B.
Affiliations
  • Justus-Liebig-Universität Gießen (DE)
  • University of Göttingen (DE)
  • Martin Luther University Halle-Wittenberg (DE)
  • University of Bayreuth (DE)
  • Ruhr University Bochum (DE)
ORCID
Venue
Soil Biology and Biochemistry
Publisher
Elsevier BV
Published
2007-09
Volume
39
Issue
9
Pages
2183-2207
ISSN
0038-0717 (ISSN-L)
DOI
10.1016/j.soilbio.2007.03.007
OpenAlex
W2163103579
Cited by
1,590
References
279
Citations by year
2026: 92 · 2025: 115 · 2024: 138 · 2023: 135 · 2022: 111 · 2021: 119 · 2020: 102 · 2019: 82 · 2018: 80 · 2017: 96 · 2016: 75 · 2015: 78 · 2014: 78 · 2013: 81 · 2012: 59
FWCI
60.44
Type
journal article
Language
en
Open access
closed
Licence
www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations
  • Soil Biology and Biochemistry (publishedVersion)
  • GRO (submittedVersion)
  • OpenAgrar (submittedVersion)
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
  • Physical Sciences › Engineering › Civil and Structural Engineering › Soil and Unsaturated Flow
Keywords
soil organic matter, density fractionation, magnetic susceptibility, oxidation resistance, light fraction, soil microbial biomass, black carbon, compound-specific isotope analysis

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