Physical parameters of Fluvisols on flooded and non-flooded terraces
| Autor: | Milena Kercheva, Kamil Skic, Mieczysław Hajnos, Zofia Sokołowska, Toma Shishkov |
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| Rok vydání: | 2017 |
| Předmět: |
Moisture
Soil texture Soil organic matter Soil classification Soil science Sorption 04 agricultural and veterinary sciences 010501 environmental sciences 01 natural sciences Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Soil horizon Environmental science Subsoil 0105 earth and related environmental sciences |
| Zdroj: | International Agrophysics. 31:73-82 |
| ISSN: | 2300-8725 |
| DOI: | 10.1515/intag-2016-0026 |
| Popis: | The heterogeneity of soil physical properties of Fluvisols, lack of large pristine areas, and different moisture regimes on non-flooded and flooded terraces impede the possibility to find a soil profile which can serve as a baseline for estimating the impact of natural or anthropogenic factors on soil evolution. The aim of this study is to compare the pore size distribution of pristine Fluvisols on flooded and non-flooded terraces using the method of the soil water retention curve, mercury intrusion porosimetry, nitrogen adsorption isotherms, and water vapour sorption. The pore size distribution of humic horizons of pristine Fluvisols on the non-flooded terrace differs from pore size distribution of Fluvisols on the flooded terrace. The peaks of textural and structural pores are higher in the humic horizons under more humid conditions. The structural characteristics of subsoil horizons depend on soil texture and evolution stage. The peaks of textural pores at about 1 mm diminish with lowering of the soil organic content. Structureless horizons are characterized by uni-modal pore size distribution. Although the content of structural pores of the subsoil horizons of Fluvisols on the non-flooded terrace is low, these pores are represented by biopores, as the coefficient of filtration is moderately high. The difference between non-flooded and flooded profiles is well expressed by the available water storage, volume and mean radius of pores, obtained by mercury intrusion porosimetry and water desorption, which are higher in the surface horizons of frequently flooded Fluvisols. |
| Databáze: | OpenAIRE |
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