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Untitled - MendelNet 2013 - Mendelova zemědělská a lesnická ...

Untitled - MendelNet 2013 - Mendelova zemědělská a lesnická ...

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MENDELNET <strong>2013</strong>THE BIOLOGICAL BACKGROUND TO INTERNAL SOIL EROSIONUrbánková O., Záhora J., Záhora J.Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Facultyof Agronomy, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech RepublicE-mail: olga.urbank1@mendelu.czABSTRACTSoil erosion is one of the most deleterious form of soil degradation. The effects of wind and watersoil erosion on topsoil are well discribed types of soil erosion. Nevertheless there exists suuficientdata about different form of soil erosion, which changes the soil structure and water regime insubsoil. The term internal soil erosion is primarily characterized by strong reduction in soilmicrobial activities followed by the breakdown of soil aggregates and decrease soil aggregatestability which caused the leaching of fines soil particles by the percoleting water. The term of thisphenomenon is only scarely used. The importance of the soil microbial activities, the role of soilorganic matter and plant roots as key players of stability of soil aggregates are in the articleemphasized.Key words: internal soil erosion, soil aggregation, soil microorganisms, root exudatesAcknowledgments: This work was funded by the Ministry of Agriculture of Czech Republic(Project Nr. NAZV QJ 120007) and by the project SONDAR CZ-AT.384 | P age

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