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Microaggregate stability and storage of organic carbon is affected by clay content in arable Luvisols

Title data

Krause, Lars ; Rodionov, Andrei ; Schweizer, Steffen A. ; Siebers, Nina ; Lehndorff, Eva ; Klumpp, Erwin ; Amelung, Wulf:
Microaggregate stability and storage of organic carbon is affected by clay content in arable Luvisols.
In: Soil & Tillage Research. Vol. 182 (October 2018) . - pp. 123-129.
ISSN 0167-1987
DOI: https://doi.org/10.1016/j.still.2018.05.003

Abstract in another language

As soil microaggregates (250 μm) were dispersed ultrasonically to study occluded SMA and single building units. Finally, we analyzed the size distribution of the small SMA by laser diffraction analysis. The total mass distribution of free and occluded SMA grouped soils into those with small (19, 22, and 24%) and large (32 and 34%) clay contents. The finer textured soils exhibited larger portions of occluded SMA, with a gamma size distribution of small SMA peaking at 6 μm. Yet the occluded small SMA in the finer textured soils showed an additional enrichment of colloids <1 μm. The SOC was indeed enriched in finer fractions, but more in the small SMA of the coarse textured sites than in the finer textured ones, whereas the opposite was true for the large SMA. We conclude, therefore, that elevated contents of clay-sized particles promote SMA formation and stabilization, therewith shifting SOC enrichment from small to larger SMA.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER151475
Institutions of the University: Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology > Chair Soil Ecology - Univ.-Prof. Dr. Eva Lehndorff
Result of work at the UBT: No
DDC Subjects: 500 Science
500 Science > 550 Earth sciences, geology
Date Deposited: 22 Jan 2020 08:00
Last Modified: 22 Jan 2020 08:00
URI: https://eref.uni-bayreuth.de/id/eprint/53939