NOVELTY - Fertilizer comprises 32-36 pts. wt. rapeseed cake, 23-26 pts. wt. lees, 10-13 pts. wt. molasses, 13-16 pts. wt. ammonium bicarbonate, 1-3 pts. wt. triple superphosphate, 15-17 pts. wt. potassium sulfate, 21-25 pts. wt. dried duck manure, 12-16 pts. wt. cornmeal, 21-25 pts. wt. dried rabbit manure, 3-5 pts. wt. vitamin C, 3-6 pts. wt. redispersible powder, 13-17 pts. wt. polyvinyl alcohol, 5-8 pts. wt. effective microorganism, 12-14 pts. wt. soil modifying agent, and water (remainder).    USE - The fertilizer is useful for increasing antioxidant capacity of strawberry (claimed).    ADVANTAGE - The fertilizer is cost-effective, degrades easily, enables to increase organic matter in soil and improves soil quality and strawberry quality.    DETAILED DESCRIPTION - Fertilizer comprises 32-36 pts. wt. rapeseed cake, 23-26 pts. wt. lees, 10-13 pts. wt. molasses, 13-16 pts. wt. ammonium bicarbonate, 1-3 pts. wt. triple superphosphate, 15-17 pts. wt. potassium sulfate, 21-25 pts. wt. dried duck manure, 12-16 pts. wt. cornmeal, 21-25 pts. wt. dried rabbit manure, 3-5 pts. wt. vitamin C, 3-6 pts. wt. redispersible powder, 13-17 pts. wt. polyvinyl alcohol, 5-8 pts. wt. effective microorganism, 12-14 pts. wt. soil modifying agent, and water (remainder). The soil modifying agent comprises 1-2 pts. wt. ammonium sulfate, 2-3 pts. wt. potassium chloride, 0.5-1 pt. wt. enriched yeast, 1-2 pts. wt. calcium chloride, 2-3 pts. wt. zinc gluconate, 3-5 pts. wt. potassium humate, 2-3 pts. wt. phosphoric acid, 1-2 pts. wt. triple superphosphate, 8-10 pts. wt. bentonite, 2-4 pts. wt. potassium dodecylbenzenesulfonate, 10-12 pts. wt. polyurethane, 8-10 pts. wt. cellulose acetate, and 2-3 pts. wt. sorbitan fatty acid ester. The soil modifying agent is prepared by weighing the above-mentioned raw materials, dissolving ammonium sulfate, potassium chloride, enriched yeast, calcium chloride, zinc gluconate, potassium humate, phosphoric acid, and triple superphosphate in water, stirring uniformly, adding bentonite, potassium dodecylbenzenesulfonate, and sorbitan fatty acid ester, mixing uniformly, granulating, dissolving cellulose acetate in acetone, spraying dissolved material on granules, drying granules, sieving dried granules, dissolving polyurethane in suitable amount of water, and coating granules using dissolved polyurethane to obtain product, where the thickness of coating is determined based on the sustained release time. An INDEPENDENT CLAIM is included for method for preparing the fertilizer, which involves (a) mixing rapeseed cake, beer lees, molasses, dried duck manure, dried rabbit manure, cornmeal and effective microorganism, maintaining moisture content to 41-45%, stirring uniformly, sealing container, performing an anaerobic fermentation at room temperature for 22-27 days, turning the mixture 3-4 times once every day, drying fermented mixture and sieving dried mixture using 200-400 mesh sieve, (b) mixing soil modifying agent, polyvinyl alcohol and remaining raw materials to obtain mixed material, and mixing mixed material with mixture obtained in step (a) using mixer, (c) adding soil modifying agent and mixture obtained in the step (b) to drum granulator, dissolving 5% polyvinyl alcohol in water, spraying mixture uniformly on surface of granules to obtain coated granules, drying coated granules at 60-70 degrees C under hot air and cooling dried granules at room temperature.