NOVELTY - Fertilizer synergist comprises kaolin (36-39 pts. wt.), attapulgite (3-4 pts. wt.), calcium carbonate powder (6-7 pts. wt.), attapulgite (3-4 pts. wt.), modified powdered rock phosphate (60-80 pts. wt.), sodium nitrophenolate formulations (1-2 pts. wt.), sodium humate (3-6 pts. wt.), lees (8-10 pts. wt.), dead leaves (12-14 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.), and Bacillus subtilis (2-3 pts. wt.).    USE - Fertilizer synergist used for improving phosphorus uptake in rapeseed (claimed).    ADVANTAGE - The fertilizer synergist ensures increased utilization that alleviates problem of soil phosphorus deficiency.    DETAILED DESCRIPTION - Fertilizer synergist comprises kaolin (36-39 pts. wt.), attapulgite (3-4 pts. wt.), calcium carbonate powder (6-7 pts. wt.), attapulgite (3-4 pts. wt.), modified powdered rock phosphate (60-80 pts. wt.), sodium nitrophenolate formulations (1-2 pts. wt.), sodium humate (3-6 pts. wt.), lees (8-10 pts. wt.), dead leaves (12-14 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 sodium humate, lees, dead leaves and water in fermentation tank at 40-50 degrees C for 2-3 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 80-110 mesh sieve to obtain the final product.