Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 1
Written by Vera PETROVA, Milena YORDANOVA
The purpose of the experiment is to study the influence of incorporated carbonised plant residues on the nutrient storage in soil during the zucchini vegetation. The experiment was carried out in the experimental field on University of Forestr
- Sofia (42° 7′ N, 23° 43′ E), on fluvisols. Six variants have been developed: 1) V1- pure soil; 2) V2 - with manure (4 t/da); 3) V3 - with biochar (500 kg/da); 4) V4 - manure (4 t/da) + biochar (250 kg/da); 5) V5 - manure (4 t/da) + biochar (500 kg/da); 6) V6 - manure (4 t/da) + biochar (750 kg/da). The highest N content in the experimental variants was reported in V6 - (manure 4t/da + BCh 750 kg/da), which was found to be optimal for the development of zucchini. The lowest NPK values were reported in V1 and V3. Positive effects on soil nutrients, organic matter and zucchini yield indicates that biochar could partly replace chemical fertilizers.
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