NOVELTY - Fertilizer synergist comprises modified phosphate rock (60-80 pts. wt.), attapulgite (3-4 pts. wt.), copper sulfate powder (3-5 pts. wt.), manganese sulfate (3-4 pts. wt.), vermicompost (23-27 pts. wt.), peat (10-16 pts. wt.), kaolin (48-54 pts. wt.), feather meal (8-10 pts. wt.), and water. Modified phosphate rock comprises rock phosphate powder (90-110 pts. wt.), gamma-polyglutamate powder (1-2 pts. wt.), ferrous sulfate (4-8 pts. wt.), calcium bicarbonate (6-9 pts. wt.), Bacillus subtilis (2-3 pts. wt.), silicate bacteria (3-4 pts. wt.), and EDTA-chelated copper (18-22 pts. wt.).    USE - Fertilizer synergist used for peanuts for improving soil nutrient availability (claimed).    ADVANTAGE - The fertilizer synergist improves soil ionic strength, enhances effectiveness of nutrients to promote growth of peanuts, and ensures increased economic benefits.    DETAILED DESCRIPTION - Fertilizer synergist comprises modified phosphate rock (60-80 pts. wt.), attapulgite (3-4 pts. wt.), copper sulfate powder (3-5 pts. wt.), manganese sulfate (3-4 pts. wt.), vermicompost (23-27 pts. wt.), peat (10-16 pts. wt.), kaolin (48-54 pts. wt.), feather meal (8-10 pts. wt.), and water. Modified phosphate rock comprises rock phosphate powder (90-110 pts. wt.), gamma-polyglutamate powder (1-2 pts. wt.), ferrous sulfate (4-8 pts. wt.), calcium bicarbonate (6-9 pts. wt.), Bacillus subtilis (2-3 pts. wt.), silicate bacteria (3-4 pts. wt.), EDTA-chelated copper (18-22 pts. wt.), manganese humate (24-26 pts. wt.), black liquor (13-17 pts. wt.), and corn starch (35-45 pts. wt.). Modified phosphate rock is prepared by heating black liquor to facilitate its concentration, and then adding phosphate rock. Obtained mixture is calcined at 400-500 degrees C, and then mixed with gamma-polyglutamate powder, EDTA-chelated copper, manganese humate, and corn starch. Obtained mixture is sieved by 150 mesh sieve, and then mixed with water and ferrous sulfate at 40-60 degrees C. Calcium bicarbonate is added to obtained mixture, and then heated at 60-70 degrees C under stirring condition for 30 minutes. Obtained mixture is cooled. Bacillus subtilis and silicate bacteria are dded to cooled product, and kept at room temperature for 7-8 days. Obtained mixture is air-dried and pulverized by 100-120 mesh sieve to obtain fine powder. An INDEPENDENT CLAIM is included for a method for preparing fertilizer synergist, which involves:    (A) calcining kaolin at 680-720 degrees C for 2-3 hours;    (B) pulverizing calcined kaolin by 100 mesh sieve;    (C) fermenting vermicompost, peat soil, feather meal and water in fermentation tank at 45-55 degrees C for 3-4 weeks;    (D) pulverizing fermented product to obtain fine powder;    (E) mixing fine powder, attapulgite and kaolin powder;    (F) adding remaining ingredients to obtained mixture; and    (G) pulverizing obtained mixture by 90-110 mesh sieve to obtain the final product.