Published in Scientific Papers. Series B, Horticulture, Vol. LXIV, Issue 1
Written by Irina STANEVA, Georgi KORNOV
The study was conducted in a fruit-bearing peach plantation on the site of the Fruit-Growing Institute – Plovdiv Bulgaria. In 2019 the influence of bio-products Biohumus, Agriful and Humustim on the basic soil characteristics pH, Ec, N-NO3–, N-NH4+, K2O, P2O5 has been studied. Eight years of fertilization was carried out. At the dose of 120 kg/da Biohumus, is achieved a very high degree that of available phosphorus and potassium, respectively: 80.93 mg P2O5/100 g and 43.13 mg K2O/100 g soil. Fertilization with Biohumus and Agriful results in an increase of ammonium and nitrate nitrogen in the top soil layer to a depth of 30 cm. For Agriful, ammonium nitrogen values increased from 32.15 mg/100 g (0.5 L/da) to 46.93 mg/100 g (1.0 L/da). The nitrate nitrogen increase is from 39.49 to 66.34 mg/100 g soil. Continuous application of Biohumus and Agriful creates a favorable supply of nutrients in the soil (P2O5, K2O, N-NO3–, N-NH4+), optimal for nutrition of peach plants.
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