METHOD FOR PRODUCING BIOLOGICALLY ACTIVE PHOSPHORUS-ZEOLITE FERTILIZER WITH PROLONGED EFFECT Russian patent published in 2005 - IPC

FIELD: agriculture, agricultural chemistry, fertilizers.

SUBSTANCE: invention elates to methods for producing biologically active phosphorus-zeolite fertilizers containing phosphorus, potassium, calcium, magnesium, sulfur, silicon, trace elements and phosphate-mobilizing microorganisms. Method for producing biologically active phosphorus-zeolite fertilizer involves mixing phosphorites with mordenite-containing tuff using phosphate-mobilizing microorganisms adsorbed on tuff from suspension and phosphorites with fraction size below 0.5 mm are mixed with mordenite-containing tuff with fraction size below 2 mm saturated with phosphate-mobilizing microorganisms in the mass ratio = 1:(0.05-0.1). The prepared fertilizer shows the following composite, wt.-%: P₂O₅, 2.7-3.5; K₂O, 3.5-4.6; sulfur (S), 0.07-0.1; CaO, 6.1-6.8; MgO, 0.2-0.5; SiO₂, 60.0-65.0; manganese (Mn), 1.44-2.77; zinc (Zn), 0.017-0.020; copper (Cu), 0.016-0.018; cobalt (Co), 0.0009-0.0013; molybdenum (Mo), 0.002-0.005, and phosphate-mobilizing microorganisms, 10^7-8 cells/spores/ Using the biologically active phosphorus-zeolite fertilizer in the dose 5 t per hectare increases amount of phosphate-mobilizing microorganisms in chestnut soil by 6-23 times, phosphatase activity by 7-24 times and enhances the content of nitrate nitrogen, mobile phosphorus and exchangeable potassium also.

EFFECT: improved method for producing.

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