The invention relates to a broad-spectrum
bioactive composite foliar
fertilizer and its preparation method. The preparation method of the broad-spectrum
bioactive composite foliar
fertilizer comprises: (by weight of
solid substances) mixing 14.2% of
potassium dihydrogen
phosphate, 14.2% of
urea, 17.7% of brown
sugar, 30% of composite
amino acid powder, 7.1% of salt, 9.1% of
fulvic acid, 0.4% of
sodium acetate, 0.2% of
magnesium sulfate, 7.6% of trace elements, and molasses with a concentration of 2.5ml / L, a composite liquid strain of equivalent
lactic acid bacteria, yeasts, actinomycetes, aspergilli and
phosphorus bacteria and with a concentration of 10ml / L, as well as
sterile water at a temperature of 35DEG C, and conducting microaerobic
fermentation for 192-288h, then adding
photosynthetic bacteria with a concentration of 1ml / L for stirring, leaving the mixture to 48-96h of illumination, then adjusting the PH value, thus obtaining a
bioactive composite foliar
fertilizer. The bioactive composite foliar fertilizer of the invention can promote
crop photosynthesis, activate the activity of each
enzyme, enhance
disease prevention and antibacterial properties of plants, and improve the
stress resistance of plants. Characterized by no
pollution, no public
hazard, lasting fertilizer effect, the fertilizer of the invention can strengthen seedlings,
resist diseases, enhance output, improve agricultural product quality, and bring products to market about 7-15 days earlier, thus improving agricultural
economic benefits.