Acta Geodynamica et Geomaterialia

Title: DYNAMICS OF ORGANIC MATTER IN SOILS FOLLOWING A CHANGE IN LANDUSE ON PERMO-CARBONIFEROUS ROCKS IN THE CESKY BROD AREA (CZECH REPUBLIC)
Authors: Artemyeva Zinaida S., Žigová Аnna, Kirillova Natalia P. and Šťastný Martin
DOI: 10.13168/AGG.2018.0025
Journal: Acta Geodynamica et Geomaterialia, Vol. 15, No. 4 (192), Prague 2018
Full Text: PDF file (1.1 MB)
Keywords: organic matter, granulo-densimetric fractionation, sonification, light fractions, organo-clay complexes, Permo-Carboniferous rocks, landuse
Abstract: Organic matter properties of soils were studied in a territory covered by Stagnosols after afforestation. We quantified the impact of afforestation on the amount and distribution of free organic matter, microaggregates (unstable and stable under low-intensity sonification) and their components in the upper horizons of former arable soils overgrown by different species of forest vegetation. The duration of 45 years after afforestation was revealed to be not sufficient for a complete renewal of soil humus state, which appears only after till 115 years of the duration of forest cenosis. The carbon storage in light fractions remains lower by 21–40 % relative to that of forest soil, including significant losses of free organic matter (42–58 %) and occluded organic matter (12–33 %), which present the most active part of soil organic matter. The positive impact of the deposit regime, expressed by a sharp improvement of the carbon cycle balance, is reflected by the Cunstable/Cstable ratio, which decreases from 6.2 in arable soil to 2.4 on average in forest stands.