LIQUID COMPLEX NITROGEN-PHOSPHORUS-POTASSIUM FERTILIZER AND METHOD FOR ITS PRODUCTION Russian patent published in 2022 - IPC C05G1/00 C05D9/02 

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture. Liquid nitrogen-phosphorus-potassium fertilizer includes nitrogen, phosphorus, potassium and modifying additives. As a modifying additive, it contains trace elements iron, zinc, manganese, copper and silver in the form of aqueous colloidal solutions of nanoparticles 10-100 nm in size obtained by pulsed laser ablation in deionized water of the corresponding pure metals. Trace elements calcium and phosphorus are contained in the form of a suspension of nanoparticles of tricalcium phosphate Cа₃(PO₄)₂ with a size of 10-100 nm. Additionally, liquid nitrogen-phosphorus-potassium fertilizer contains microelements calcium, potassium, cobalt, magnesium, boron in the form of water-soluble calcium salts of nitrate tetrahydrate Cа(NO₃)₂⋅4H₂O, potassium carbonate K₂CO₃, cobalt nitrate hexahydrate Co(NO₃)₂⋅6H₂O, chloride magnesium hexahydrate MgCl₂⋅6H₂O, sodium tetraborate Na₂B₄O₇. Liquid nitrogen-phosphorus-potassium fertilizer contains microelements in concentration: iron - 1.6 mg/l, zinc - 0.3 mg/l, manganese - 0.5 mg/l, copper - 0.1 mg/l, silver - 0.5 mg/l, water-soluble salts in concentration: Ca(NO₃)₂⋅4H₂O - 0.275 g/l, K₂CO₃ - 0.212 g/l, Co(NO₃)₂⋅6H₂O - 0.00011 g/l, MgCl₂⋅6H₂O - 0.214 g/l, Na₂B₄O₇ - 0.00093 g/l, concentrated suspension of tricalcium phosphate Cа₃(PO₄)₂ - 0.5 ml/l. The method for obtaining liquid nitrogen-phosphorus-potassium fertilizer includes mixing distilled water with a concentrated suspension of tricalcium phosphate Ca₃(PO₄)₂, NPK fertilizer is added to the resulting solution, then colloidal particles of a solution of iron, zinc, manganese, copper and silver, obtained by pulsed laser ablation in deionized water of the corresponding pure metals, water-soluble salts Cа(NO₃)₂⋅4H₂O, K₂CO₃, Co(NO₃)₂⋅6H₂O, MgCl₂⋅6H₂O, Na₂B₄O₇ are added to the resulting solution, after which the resulting solution is stirred for 2 hours. Potassium nitrate, ammophos and ammonium nitrate are used as the basis of NPK fertilizer.

EFFECT: proposed liquid nitrogen-phosphorus-potassium fertilizer can be used as a hydroponic solution for growing plants, is an environmentally friendly liquid complex NPK fertilizer with a balanced composition of minerals and a reduced content of salts and impurities, provides an increase in the absorption of macro- and microelements by plants, allows you to activate growth plants through the use of aqueous colloidal solutions of trace elements obtained by laser ablation.

5 cl, 1 dwg, 1 tbl, 1 ex