Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 351418
Title Selective depletion of organic matter in mottled podzol horizons
Author(s) Buurman, P.; Schellekens, J.F.P.; Fritze, H.; Nierop, K.G.J.
Source Soil Biology and Biochemistry 39 (2007)2. - ISSN 0038-0717 - p. 607 - 621.
DOI https://doi.org/10.1016/j.soilbio.2006.09.012
Department(s) Earth System Science
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2007
Keyword(s) chromatography mass-spectrometry - forest soils - chemical characterization - microbial communities - c-13 nmr - pyrolysis - decomposition - acids - biomass - fungi
Abstract Some well-drained podzols on quartz sands in the Netherlands and neighbouring Belgium and Germany show mottling in all horizons due to selective removal of organic matter. Phospholipid analysis and morphology of the mottles suggests that this removal is due to a combination of bacteria, fungi, and actinomycetes. Investigation by pyrolysis-GC/MS of organic matter in the depleted zones as compared to their surroundings indicates (1) selective decay of relatively palatable components, (2) residual accumulation of aliphatic biopolymers such as cutan and suberan that produce alkanes, alkenes and methylketones upon pyrolysis, and (3) accumulation of microbial polysaccharides and N-containing compounds. Although the selective organic matter decay in the depleted mottles is similar to the process that causes degradation of organic matter at the top of the B-horizon and its conversion to an E-horizon, the essential difference is that, while decay at the E¿B-horizon transition in podzols is governed by the presence or absence of aluminium and iron, the micro flora that is responsible for the decay mottles acts independently from metal concentrations.
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