Published in Scientific Papers. Series A. Agonomy., Vol. LVI
Written by Delia Augustina CĂRĂBIŞ, Lavinia PÂRVAN, Carmen SÎRBU, Traian CIOROIANU
During the experiments, the potassium humate used in obtaining the fertilizer was extracted from the coal mass, lignite, as a potassium carbonate solution. The humic/fulvic mix present in the fertilizer matrix contained approximately 70% organic acids, whereof 50% derive from humic acids and 20% from fulvic acids. The treatments made with the new humate-based liquid fertilizer AH-N applied in two doses (150 l/ha) showed an increase of the mobile phosphorus in the soil as compared to the non-fertilized control, from 58.20 mg/kg to 70.61 mg/kg due to the fertilizer containing NPK in its matrix. As for the mobile potassium upon application of the liquid fertilizers, increases were noticed by the application of the AH-I liquid fertilizer in two doses (150 l/ha), 199.20 mg/ha as compared to the non-fertilized control 186 mg/ha. By the application of the new liquid fertilizer AH-U 150 l/ha, it increased the mobile potassium content in the soil to 188 mg/kg as compared to the nonfertilized control of 170 mg/kg at the end of the experiments.
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humate-based liquid fertilizers
