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von Lützow, M. ; Leifeld, J.* ; Kainz, M.* ; Kögel-Knabner, I.* ; Munch, J.-C.

Indications for soil organic matter quality in soils under different management.

Geoderma 105, 243-258 (2002)
DOI
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
Changes in management practice are reflected by soil carbon and nitrogen status, in particular by the proportion of soil organic matter (SOM) being easily transformed (active SOM). We describe SOM quality for three management practices, Organic Farming system (OF), Integrated Crop Production (ICP) and pasture sites (G), which intend to achieve sustainable management practice. The experimental sites were conventionally farmed until 1992. SOM quality was examined by describing active SOM pools, such as the decomposed 'young soil organic matter' (YSOM), ratio of microbial biomass carbon (C-mic) to organic carbon (C-org), ecophysiological status of the microbial biomasss (qCO(2)), and the ratio of light particulate organic matter (POM-LF) to C-org. Ratios of soil microbial biomass (C-mic/C-org) and POM-LF (POM-LF/C-org) and the amount of decomposed YSOM were relatively similar to each other, despite differences in management practice and soil texture. Soil microbial parameters (C-mic, C-mic/C-org and qCO(2)) were significantly (p < 0.05) affected by the amount of decomposed YSOM and the silt content in the OF. In the ICP, soil microbial parameters depended only on the amount of decomposed YSOM, which was considered to be a consequence of the more heterogeneous texture at the OF-sites. Management effects were detectable for no-tillage in the ICP leading to an accumulation of active SOM in the surface soil (0-10 cm). The ratio POM-LF/C-org showed no difference between G and OF despite markedly higher C-org-contents at the G-sites. Conclusively, all methods used indicate comparable SOM qualities for the three management systems, despite differences in soil texture and soil management during 7 years. Management practices seem to be well adapted to the site conditions.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter microbial biomass; decomposed young soil organic matter; particulate organic matter fraction; light fraction; management system; MICROBIAL BIOMASS CARBON; N MINERALIZATION; GRASSLAND SOILS; TEXTURE; FRACTIONS; DYNAMICS; CROP; TILLAGE; QCO2
ISSN (print) / ISBN 0016-7061
e-ISSN 1872-6259
Zeitschrift Geoderma
Quellenangaben Band: 105, Heft: 3-4, Seiten: 243-258 Artikelnummer: , Supplement: ,
Verlag Elsevier
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Soil Ecology (IBOE)