Abstract
The research investigates the effectiveness of natural zeolites, diatomaceous earth and compost mixture as self-effects and their combinations on the NPK potential of two soil types. In both soils, the following variants were investigated: soil-compost (SC), soil-zeolite (SZ) and soil-diatomite (SD); as well as combined variants such as soil-compost-zeolite (SCZ) and soil-compost-diatomite (SCD). These components are composted over 60 days under controlled conditions. To achieve this goal, basic physicochemical parameters such as pH and electrical conductivity, cation exchange capacity (CEC), and agrochemical indicators – humus and mineral forms of nitrogen, phosphorus and potassium – before and after composting were traced. The study shows that combining natural zeolites and diatomaceous earth sludge with compost contributes to increasing potassium and phosphorus levels in the soil while maintaining the stability of soil organic matter, highlighting the most effective impact on phosphorus under certain pH conditions.
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