NOVELTY - Nano-fertilizer comprises Lactobacillus acidophilus, Bacillus licheniformis, Bacillus subtilis, potassium humate, soybean cake, peanut cake, phosphate rock, borax, calcium chloride, soluble chitosan, pig slaughterhouse waste, peat, ammonium bicarbonate, diammonium phosphate, potassium chloride, zinc sulfate, boric acid, manganese sulfate, medical stone powder, calcium powder, bentonite, thiourea, diatomite, another phosphate rock, sodium humate, proline, methionine, glycine, threonine, tyrosine, pepper, Ginkgo biloba seed, and Cnidium fruit.    USE - The nano-fertilizer is useful for treating downy mildew in Asparagus (claimed).    ADVANTAGE - The nano-fertilizer exhibits stable and reliable cultivation effect, promotes the growth of Asparagus, and improves the quality of Asparagus.    DETAILED DESCRIPTION - Nano-fertilizer comprises 1-3 pts. wt. of Lactobacillus acidophilus, 2-4 pts. wt. of Bacillus licheniformis, 3-5 pts. wt. of Bacillus subtilis, 2-4 pts. wt. of potassium humate, 20-30 pts. wt. of soybean cake, 10-30 pts. wt. of peanut cake, 10-15 pts. wt. of phosphate rock, 5-8 pts. wt. of borax, 4-6 pts. wt. of calcium chloride, 4-6 pts. wt. of soluble chitosan, 10-20 pts. wt. of pig slaughterhouse waste, 20-30 pts. wt. of peat, 35-45 pts. wt. of ammonium bicarbonate, 20-30 pts. wt. of diammonium phosphate, 5-10 pts. wt. of potassium chloride, 1-2 pts. wt. of zinc sulfate, 1-2 pts. wt. of boric acid, 5-10 pts. wt. of manganese sulfate, 25-30 pts. wt. of medical stone powder, 5-10 pts. wt. of calcium powder, 20-25 pts. wt. of bentonite, 5-15 pts. wt. of thiourea, 10-20 pts. wt. of diatomite, 10-20 pts. wt. of another phosphate rock, 5-15 pts. wt. of sodium humate, 10-25 pts. wt. of proline, 15-20 pts. wt. of methionine, 16-23 pts. wt. of glycine, 26-33 pts. wt. of threonine, 5-15 pts. wt. of tyrosine, 20-30 pts. wt. of pepper, 20-30 pts. wt. of Ginkgo biloba seed, 20-30 pts. wt. of Cnidium fruit, 10-30 pts. wt. of Melia azedarach, 15-25 pts. wt. of quisqualis fructus, 1-15 pts. wt. of gallnut, 5-15 pts. wt. of radix ilicis pubescentis, 5-10 pts. wt. of matrine, 55-60 pts. wt. of Sapindus testa, 10-20 pts. wt. of organic solvent, 25-30 pts. wt. of silicon hydroxyapatite, 10-15 pts. wt. of wollastonite, and 1-3 pts. wt. of silica material. An INDEPENDENT CLAIM is included for preparing the nano-fertilizer comprising mixing soybean cake, peanut cake, pig slaughterhouse waste, peat, Lactobacillus acidophilus, Bacillus licheniformis and Bacillus subtilis and then completely dissolving, placing the mixture into a mixing tank with upper plastic film cover, performing pre-fermentation for 3-5 days, peeling off the plastic film, stirring the mixture, exposing the mixture to oxygen, gradually raising the temperature to room temperature to 45 degrees C for 2-3 days and to 45-60 degrees C for 3-5 days, reducing the temperature to normal temperature, maintaining for 7-10 days until the organic waste is fully cured, drying and crushing over 80 mesh sieve to obtain cured organic powder, mixing potassium humate, phosphate rock, borax, calcium chloride, soluble chitosan, ammonium bicarbonate, diammonium phosphate, potassium chloride, zinc sulfate, boric acid, manganese sulfate, medical stone powder, calcium powder, bentonite, thiourea, diatomite, phosphate rock, sodium humate, proline, methionine, glycine, threonine, tyrosine, pepper, Ginkgo biloba seed, Cnidium fruit, Melia azedarach, quisqualis fructus, gallnut, radix ilicis pubescentis, matrine and Sapindus testa with organic powder, uniformly stirring, adding proper amount of water to the mixture to completely dissolve, adding silicon hydroxyapatite and silica material to the mixture and stirring at a speed of 2500 revolutions per minute (rpm) to obtain oil-water emulsion formation, reducing the number of revolutions to 1500 rpm, stirring for 25 minutes and adding dilute hydrochloric acid to adjust PH value to 3, raising the temperature to 5-55 degrees C, continuously stirring for 2 hours, and adding sodium hydroxide to adjust pH value to 7.