von Lützow, M; Kögel-Knabner, I; Ekschmitt, K; Matzner, E; Guggenberger, G; Marschner, B; Flessa, H: Stabilization of organic matter in temperate soils: Mechanisms and their relevance under different soil conditions - a review, European Journal of Soil Science, 57(4), 426-445 (2006), doi:10.1111/j.1365-2389.2006.00809.x
Mechanisms for C stabilization in soils have received much interest recently due to their relevance in the global C cycle. Here we review the mechanisms that are currently, but often contradictorily or inconsistently, considered to contribute to organic matter (OM) protection against decomposition in temperate soils: (i) selective preservation due to recalcitrance of OM, including plant litter, rhizodeposits, microbial products, humic polymers, and charred OM; (ii) spatial inaccessibility of OM against decomposer organisms due to occlusion, intercalation, hydrophobicity and encapsulation; and (iii) stabilization by interaction with mineral surfaces (Fe-, Al-, Mn-oxides, phyllosilicates) and metal ions. Our goal is to assess the relevance of these mechanisms to the formation of soil OM during different stages of decomposition and under different soil conditions. The view that OM stabilization is dominated by the selective preservation of recalcitrant organic components that accumulate in proportion to their chemical properties can no longer be accepted. In contrast, our analysis of mechanisms shows that: (i) the soil biotic community is able to disintegrate any OM of natural origin; (ii) molecular recalcitrance of OM is relative, rather than absolute; (iii) recalcitrance is only important during early decomposition and in active surface soils; while (iv) during late decomposition and in the subsoil, the relevance of spatial inaccessibility and organo-mineral interactions for SOM stabilization increases. We conclude that major difficulties in the understanding and prediction of SOM dynamics originate from the simultaneous operation of several mechanisms. We discuss knowledge gaps and promising directions of future research.
Upcoming ...

Fr. 2020-07-10 now
12th BayCEER Workshop 2020: "Call for Abstracts" is open
BayCEER Colloquium:
Th. 2020-11-05
Signaling of rhizosphere microbiome: key for plant health, development and nutrition
Ecological-Botanical Garden:
Su. 2020-10-04
Führung nach Anmeldung: Pflanzen für ein gesundes Herz
Su. 2020-11-01
Führung nach Anmeldung: Palmen und Proteen: Pflanzen für Grabgestecke
Th. 2020-10-29
BayCEER Workshop 2020
BayCEER Blog
Why Science Communication?
Stoichiometric controls of C and N cycling
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
Picky carnivorous plants?
RSS Blog as RSS Feed
Weather research site
Luftdruck (356m): 962.5 hPa
Lufttemperatur: 19.9 °C
Niederschlag: 0.3 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 6.9 km/h
Wind (Max.): 14.8 km/h
Windrichtung: S

Globalstrahlung: 173 W/m²
Wind (Höhe 32m): 0.0 km/h

This site makes use of cookies More information