Optimalizace vlastností kompostových substrátů aplikací pyrolýzních prachů

Abstract

This master‘s thesis discusses the possibilities of applying pyrolysis dusts (biochars) as part of supporting the composting process or enriching already matured compost and agricultural land. It describes in detail the contemporary knowledge of the use of biochar in relation to the topic of improvement of the composting process and the enrichment of the resulting composts. The practical part concerns with the implementation of vegetation tests on the perennial ryegrass plant (Lolium perenne L.) planted inside mixtures of three different composts and biochars mixed in three different volume ratios and the subsequent evaluation of the results in relation to the changes in biomass yield and to presence of heavy metals. Vegetation tests revealed an increase in biomass growth by an average of 4.73 % of dry matter weight; the maximum was an increase of 16.62 wt. %. When compared to the control group, the increase in presence of some heavy metals inside of individual mixtures ranged between units of percents and several thousands of percent.