Special fertilizer for potatoes and preparation method of special fertilizer

The invention discloses special fertilizer for potatoes. The special fertilizer is prepared from the following raw materials in parts by weight: 250 to 280 parts of urea, 0 to 100 parts of ammonium hydrogen carbonate, 200 to 250 parts of monoammonium phosphate, 300 to 350 parts of potassium sulfate, 25 to 50 parts of potassium chloride, 0 to 10 parts of boric acid, 0 to 15 parts of EDTA (Ethylene Diamine Tetraacetic Acid)-2Na, 0 to 15 parts of mineral resource humic acid, 0 to 5 parts of zinc sulphate monohydrate, 0 to 5 parts of manganese sulfate monohydrate, 0 to 10 parts of polyacrylamide and 100 to 150 parts of bentonite. According to the special fertilizer disclosed by the invention, the components are scientifically and reasonably matched according to the characteristics that potato grow needs fertilizing, so that yield per unit area, the potato forming quantities of single plants and the rate of big potatoes can be effectively improved. 本发明公开了种马铃薯专用肥包括以下重量份数的原料：尿素250-280份、碳酸氢铵0-100份、磷酸铵200-250份、硫酸钾300-