The long-term changes in soil organic matter contents and quality in Chernozems

Jan Horáček, Pavel Novák, Peter Liebhard, Eduard Strosser and Mária Babulicová
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Jan Horáček: Department of Applied Plant Biotechnologies, Faculty of Agronomy, University of South Bohemia, České Budějovice, Czech Republic
Pavel Novák: Research Institute for Soil and Water Conservation, Prague, Czech Republic
Peter Liebhard: Division of Agronomy, Department of Crop Sciences, BOKU University of Natural Resources and Life Sciences, Vienna, Austria
Eduard Strosser: Department of Applied Plant Biotechnologies, Faculty of Agronomy, University of South Bohemia, České Budějovice, Czech Republic
Mária Babulicová: Agricultural and Food Centre - Research Institute for Plant Production Piešťany, Piešťany, Slovak Republic

Plant, Soil and Environment, 2017, vol. 63, issue 1, 8-13

Abstract: For the purposes of assessment of long-term changes, two sets of Chernozems soil samples were analysed and compared in parallel: 'old' file samples obtained during the Soil Survey 1960-1970 in the former Czechoslovakia and a 'present' (2013) set of samples from exactly the same sites as the archive samples. The recently collected samples revealed worse qualitative parameters (lower humic acid to fulvic acid (HA/FA) ratios and higher colour quotient Q4/6 values) than the file samples, for all the localities. On the other side, the quantitative soil organic matter (SOM) parameters (oxidizable carbon (Cox) and all its determined components) showed contrary results. The amount of total SOM at the same sites is higher now than it was about 50 years ago. It can be concluded that the current decline in SOM quality in Chernozems is partly compensated for by higher accumulation of SOM in the soils. All the analysed Chernozem samples were found to have much worse qualitative SOM parameters than the values mentioned for this soil type in the older literature. However, a comparison of the current data and the file data of Chernozem SOM quality can still be considered an open issue and require more complex research.

Keywords: soil organic matter quantity and quality; soil organic matter changes in time; organic substances (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:63:y:2017:i:1:id:274-2016-pse

DOI: 10.17221/274/2016-PSE

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