NOVELTY - Slow release fertilizer granules comprise inorganic fertilizer core body (1), covering layer wrapped on core body. Inner layer of core body comprises calcium phosphate and diatomite layer (2), organic fertilizer layer (3), and microbial layer (4). Outer layer of core body comprises superphosphate and diatomaceous earth layer and hydrogel layer (6).    USE - Slow release fertilizer granules.    ADVANTAGE - The slow release fertilizer granules provide nutrients to plants, and promotes growth of plants.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing slow release fertilizer granules, which involves:    (A) taking urea (20-25 pts. wt.), monoammonium phosphate (20-25 pts. wt.), potassium sulfate (18-20 pts. wt.), 80-100 mesh starch (15-25 pts. wt.), chicken manure (30-40 pts. wt.), carbon powder (15-25 pts. wt.), calcium superphosphate (10-20 pts. wt.), diatomite (10-20 pts. wt.), solid microbial inoculum (5-15 pts. wt.), and environment sensitive hydrogel (5-15 pts. wt.);    (B) pulverizing urea, monoammonium phosphate and potassium sulfate by 400-600 mesh sieve;    (C) adding carbon powder to pulverized product;    (D) granulating obtained mixture;    (E) drying granules to obtain sulfate inorganic fertilizer core;    (F) pulverizing calcium phosphate and diatomite by 400-600 mesh sieve;    (G) granulating obtained mixture;    (H) mixing granulated product with inorganic fertilizer core;    (I) pulverizing chicken manure by 400-600 mesh sieve;    (J) granulating obtained mixture;    (K) mixing microbial inoculum, chicken manure, and calcium phosphate and diatomite mixture;    (L) pulverizing obtained mixture by 00-600 mesh sieve;    (M) granulating obtained mixture; and    (N) adding hydrogel to obtained product to obtain the final product.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of slow release fertilizer granule.    Core body (1)    Diatomite layer (2)    Organic fertilizer layer (3)    Microbial layer (4)    Hydrogel layer (6)