NOVELTY - A slow-release organic fertilizer is prepared by mixing bagasse, corn straw carbonized powder and animal manure to obtain first mixture; mixing monoammonium phosphate, ferrous sulfate, citric acid, manganese sulfate, copper sulfate, ammonium molybdate and borax to obtain second mixture; dissolving part of second mixture in water, mixing first mixture with rapeseed cake, and fermenting to obtain third material; mixing third material with burned honeycomb briquette and rapeseed cake, drying, and crushing; and mixing with acid-activated bentonite, polyvinyl alcohol, urea and remaining mixture.    USE - Slow-release organic fertilizer used for peanut (claimed).    ADVANTAGE - The fertilizer uses easily available raw materials; has low cost; improves utilization rate of nitrogen, phosphorus and potassium; provides trace elements required for peanut growth; satisfies nutrient requirement of peanut for whole growth period; and inhibits sclerotium disease to avoid production losses.    DETAILED DESCRIPTION - A slow-release organic fertilizer is prepared by:    (A) uniformly mixing 35-45 pts. wt. bagasse, 20-25 pts. wt. corn straw carbonized powder and 13-18 pts. wt. animal manure with water content of 20-45% in a reactor at 80-90 degrees C, cooling to 25-36 degrees C, adding fungi, and uniformly mixing to obtain first mixture;    (B) uniformly mixing 0.5-1.2 pts. wt. monoammonium phosphate, 2-4 pts. wt. ferrous sulfate, 1.5-3 pts. wt. citric acid, 0.5-0.8 pt. wt. manganese sulfate, 1.5-2 pts. wt. copper sulfate, 0.5-0.8 pt. wt. ammonium molybdate and 1-3 pts. wt. borax at 68-75 degrees C to obtain second mixture;    (C) dissolving 20-24 wt.% second mixture in water to prepare 0.25-0.4 wt.% solution, uniformly mixing first mixture with 135-140 wt.% rapeseed cake, fermenting at 30-35 degrees C for 1-2 days, and adding bacteria and continuously fermenting for 2-4 days to obtain third material;    (D) uniformly mixing third material with 18-21 wt.% burned honeycomb briquette and 10-13 wt.% rapeseed cake, drying at room temperature without light for 7-8 days, and crushing to obtain dry mixture; and    (E) uniformly mixing dry mixture with 5-8 pts. wt. acid-activated bentonite, 2-5 pts. wt. polyvinyl alcohol, 30-45 pts. wt. urea and the remaining second mixture, crushing, and sieving.