Changes in soil properties and possibilities of reducing environmental risks due to the application of biological activators in conditions of very heavy soils
¹Czech University of Life Sciences Prague, Faculty of Engineering, Department of Machinery Utilization, Kamýcká 129, CZ165 000 Praha 6 – Suchdol, Czech Republic
²Agrovýzkum Rapotín Ltd., Rapotín, Výzkumníků 267, CZ788 13 Vikýřovice, Czech Republic
³Czech University of Life Sciences Prague, Faculty of Engineering, Department of Agricultural Machines, Kamýcká 129, CZ165 000 Praha 6 – Suchdol, Czech Republic
⁴Mendel University in Brno, Faculty of Forestry and Wood Technology, Department of Geology and Pedology, Zemědělská 1, CZ61 300 Brno, Czech Republic
⁵Mendel University in Brno, Faculty of AgriSciences, Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Zemědělská 1, CZ61 300 Brno, Czech Republic
This study aims at verifying the effect of farmyard manure (FYM) and of selected activators (Z’fix and NeoSol) on changes of soil properties. Their application should lead to improvement of soil physical properties and of organic matter fixation, to reduction of environmental risks, e.g. of tillage energy requirements. Experimental variants (0.7 ha each) were as follows: I (FYM with Z’fix); II (FYM with Z’fix + NeoSol); III (FYM); IV (Control NPK only). FYM was applied at rates: 50 t ha-1 (2014); 30 t ha-1 (2016). Additional NPK fertilizer (I–IV) was applied according to annual crop nutrient normative. The agent Z’fix was used as an activator of FYM biological transformation (5.5 kg t-1). The agent NeoSol was used as soil activator (200 kg ha-1; annually). In order to verify the effect, cone index, bulk density, tillage implement draft and chemical soil components (Humus, C/N ration and Ntot) were measured annually. Compared to the control, the application of FYM combined with the mentioned agents (I–III) increased Ntot more than two times. Moreover, it decreased (I–III) bulk density by 8.7%. Tillage implement draft decreased by 3% after the application of FYM with Z’fix (I, II). The study confirmed that FYM application combined with utilization of activators positively influenced soil fertility and helped to reduce environmental risks.