PROLONGED ACTION FERTILIZER BASED ON BIOCHAR, METHOD FOR PRODUCTION THEREOF AND METHOD FOR INCREASING YIELD AND QUALITY OF REMONTANT GARDEN STRAWBERRY Russian patent published in 2025 - IPC C05F11/02 C05G3/00 C05D9/00 C05C9/00 C05B7/00 C05B1/04 

FIELD: agriculture.

SUBSTANCE: prolonged action fertilizer for remontant garden strawberries based on biochar is characterized by that it has the following composition, wt.%: activated biochar – 50.06, hydroxyethyl cellulose – 2.90, zeolite – 4.83, sulphuric acid – 0.11, water – 3.36, carbamide – 20.72, potassium hydrogen-orthophosphate – 8.9, double superphosphate – 3.51, magnesium chloride – 1.04, iron sulphate – 2.33, zinc sulphate – 2.13, boric acid – 0.06, ammonium molybdate – 0.02, where activated biochar is characterized by following parameters: content of polyaromatic hydrocarbons is not more than 80-100 mg/kg, ash content is not more than 9%, iodine number is not less than 600 mg/g. Method of producing fertilizer with prolonged action for remontant garden strawberry based on biochar is characterized by that it includes primary activation of biochar – steam and gas at 450-600 °C for at least 1 hour, to obtain a primarily activated biochar, determination of primary activated biochar indices for compliance of activated biochar indices with the following: content of polyaromatic hydrocarbons is not more than 80-100 mg/kg, ash content is not more than 9%, iodine number is not less than 600 mg/g, if the values of the primary activated biochar differ from the above, secondary – chemical activation is carried out, consisting in successive treatment of the primary activated biochar: potassium hydroxide solution in weight ratio 3% to a primary activated biochar while stirring for at least 1 hour at temperature not lower than 65 °C, phosphoric acid solution in weight ratio 3% to a primary activated biochar while stirring for at least 1 hour at temperature not lower than 65 °C, hydrogen peroxide solution in weight ratio 3% to primary activated biochar while stirring for at least 1 hour at temperature not less than 65 °C, to obtain an activated biochar, mixing the activated biochar with ingredients in certain amounts, stirring them to a homogeneous state, granulation, drying at a temperature not higher than 90 °C and cooling of end product. Method for increasing yield and quality of remontant garden strawberries is characterized in that it includes a single application into open ground during preparation of soil/soil in amount of 3 g/bush of a fertilizer with a prolonged release for garden strawberries based on biochar, where activated biochar is characterized by following parameters: content of polyaromatic hydrocarbons is not more than 80-100 mg/kg, ash content is not more than 9%, iodine number is not less than 600 mg/g.

EFFECT: inventions allow to increase remontant garden strawberry yield and quality.

3 cl, 3 ex