Labile forms of carbon and soil aggregates

Erika Tobiašová, Gabriela Barančíková, Erika Gömöryová, Jarmila Makovníková, Rastislav Skalský, Ján Halas, Štefan Koco, Zuzana Tarasovičová, Jozef Takáč and Miroslav Špaňo
Additional contact information
Erika Tobiašová: Department of Soil Science, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture, Nitra, Slovak Republic
Gabriela Barančíková: Soil Science and Conservation Research Institute - National Agriculture and Food Centre, Bratislava, Slovak Republic
Erika Gömöryová: Faculty of Forestry, Technical University in Zvolen, Zvolen, Slovak Republic
Jarmila Makovníková: Soil Science and Conservation Research Institute - National Agriculture and Food Centre, Bratislava, Slovak Republic
Rastislav Skalský: Soil Science and Conservation Research Institute - National Agriculture and Food Centre, Bratislava, Slovak Republic
Ján Halas: Soil Science and Conservation Research Institute - National Agriculture and Food Centre, Bratislava, Slovak Republic
Štefan Koco: Department of Geography and Applied Geoinformatics, University of Presov, Prešov, Slovak Republic
Zuzana Tarasovičová: Soil Science and Conservation Research Institute - National Agriculture and Food Centre, Bratislava, Slovak Republic
Jozef Takáč: Soil Science and Conservation Research Institute - National Agriculture and Food Centre, Bratislava, Slovak Republic
Miroslav Špaňo: Department of Soil Science, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture, Nitra, Slovak Republic

Soil and Water Research, 2016, vol. 11, issue 4, 259-266

Abstract: Soil organic matter (SOM) plays an important role in the soil aggregation and vice versa, its incorporation into the soil aggregates is one of the mechanisms of soil organic carbon stabilization. In this study the influence of labile carbon fractions on the fractions of dry-sieved (DSA) and wet-sieved (WSA) macro-aggregates and the relationship between the content of total organic carbon (TOC) and its labile fractions in the soil and in the fractions of macro-aggregates were determined. The experiment included six soil types (Eutric Fluvisol, Mollic Fluvisol, Haplic Chernozem, Haplic Luvisol, Eutric Cambisol, Rendzic Leptosol) in four ecosystems (forest, meadow, urban, and agro-ecosystem). In the case of DSA, the contents of labile fractions of carbon, in particular cold water extractable organic carbon (CWEOC) and hot water extractable organic carbon (HWEOC), had a higher impact on the proportions of larger fractions of macro-aggregates (3-7 mm), while in the case of WSA, the impact of labile fractions of carbon, mainly labile carbon (CL) oxidizable with KMnO4, was higher on the proportions of smaller fractions of aggregates (0.25-1 mm). The WSA size fraction of 0.5-1 mm seems an important indicator of changes in the ecosystems and its amounts were in a negative correlation with CL (r = -0.317; P < 0.05) and HWEOC (r = -0.356; P < 0.05). In the WSA and DSA size fractions 0.5-1 mm, the highest variability in the contents of TOC and CL was recorded in the forest ecosystem > meadow ecosystem > urban ecosystem > agro-ecosystem. The higher were the inputs of organic substances into the soil, the greater was the variability in their incorporation into the soil aggregates. The influence of the content of TOC and its labile forms on their contents in the DSA and WSA was different, and the contents of TOC and CL in the aggregates were more significantly affected by the CL content than by water soluble carbon. In the case of WSA fractions, their carbon content was more affected in the 1-2 mm than in 0.5-1 mm fraction.

Keywords: ecosystem; labile carbon; macro-aggregates; soil type (search for similar items in EconPapers)
Date: 2016
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://swr.agriculturejournals.cz/doi/10.17221/182/2015-SWR.html (text/html)
http://swr.agriculturejournals.cz/doi/10.17221/182/2015-SWR.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlswr:v:11:y:2016:i:4:id:182-2015-swr

DOI: 10.17221/182/2015-SWR

Access Statistics for this article

Soil and Water Research is currently edited by Ing. Markéta Knížková, (Executive Editor)

More articles in Soil and Water Research from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().