Published in Scientific Papers. Series B, Horticulture, Vol. LXIII, Issue 1
Written by Boyka MALCHEVA, Milena YORDANOVA, Maya NUSTOROVA
The aim of the experiment was to study the influence of composting on the microbiological activity of the soil. The experiment was carried out in 2017 in the experimental field on University of Forestry of Sofia. Three types of compost (prepared in 2016) were used: two spring composts with plant residues (grape vine canes, fruit twigs and grass windrow) and in the second one was added and rabbit manure. And autumn compost only with plant residues from vegetable field (frostbitten tomato and pepper stems and fresh leek residues). The composts were applied to the soil at a rate of 5 t/ha by incorporating and mulching in the cultivation of tomatoes. Agrochemical and microbiological soil analyses were carried out. The main groups of heterotrophic microflorae - ammonifying bacteria (non-spore and bacilli), actinomycetes and micromycetes are defined. Data showed that spring composts increased the amount and activity of microorganisms. Autumn compost did not increase the amount but their activity was higher.
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