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

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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. … full description

Bibliographic Details

Main Author

Jan Horáček

Other Authors

Pavel Novák, 1960 březen 11.- , Peter Liebhard, Eduard Strosser, Mária Babulicová

Document Type

Articles

Physical Description

5 ilustrací

Published in

Plant, Soil and Environment. -- ISSN 1214-1178. -- Roč. 63, č. 1 (2017), s. 8-13

Subjects

FIELD EXPERIMENTATION

CHERNOZEMS

Soil horizons

Soil sampling

TIME

SOIL ANALYSIS

SOIL CHEMICOPHYSICAL PROPERTIES

SOIL ORGANIC MATTER

HUMUS

HUMIC ACIDS

FULVIC ACIDS

Cation exchange capacity

SOIL SORPTION

polní pokusy

černozemě

půdní horizonty

odběr půdních vzorků

čas

rozbory půd

chemickofyzikální půdní vlastnosti

organická hmota v půdě

humus

huminové kyseliny

fulvokyseliny

kationtová výměnná kapacita

půdní sorpce

Klapý (Česko)

Libčeves (Česko)

Libochovice (Česko)

Račiněves (Česko)

Item Description

3 grafy, 2 tabulky

Bibliography

Bibliografie na s. 12-13,