Published in Scientific Papers. Series A. Agronomy, Vol. LXV, Issue 1
Written by Vera PETROVA, Milena YORDANOVA, Tsvetelina NIKOLOVA
Field experiments with different levels of application of BC and manure were conducted, according to developed methodology based on literature data. Six variants have been developed: 1) V1- control; 2) V2 - with manure (4t/ ha-1); 3) V3 - with biochar (500 kg/ ha-1); 4) V4 - manure (4 t/ ha-1) + biochar (250 kg/ ha-1); 5) V5 - manure (4 t/ ha-1) + biochar (500 kg/ ha-1); 6) V6 - manure (4 t/ ha-1) + biochar (750 kg/ ha-1) under optimum irrigation. For each of the variants were examined the following indicators in dynamics - climate condition, pH, NPK in soil after harvesting of each crops. The dynamics of yields for zucchini, broccoli, broad bean and leek were evaluate, and the biometric data was collected. The aim was to study the effect of imported carbonized plant residues on the content of essential nutrients in the soil.
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