▎ 摘　　要

NOVELTY - Slow-release fertilizer containing polyvinyl alcohol, boric acid, and graphene comprises 900-10,000 pts. wt. chemical fertilizer, 100-200 pts. wt. polyvinyl alcohol, 5-24 pts. wt. graphene, and 10-50 pts. wt. boric acid, it has boric acid cross-linked polyvinyl alcohol graphene membrane network structure, and chemical fertilizers are dispersed in the membrane network structure and covered by the membrane. USE - Slow-release fertilizer containing polyvinyl alcohol, boric acid, and graphene. ADVANTAGE - The slow-release fertilizer containing polyvinyl alcohol, boric acid, and graphene has good flexibility of the membrane network structure, non-rupture, membrane soil material does not damage the soil ecological environment, has simple process, and has low cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing slow-release fertilizer containing polyvinyl alcohol, boric acid, and graphene, which involves: (A) dissolving 100-200 pts. wt. polyvinyl alcohol powder and 5-24 pts. wt. graphene oxide in 500-2000 pts. wt. water at 85-90 degrees C, and cool to 5-40 degrees C; (B) pouring the mixed solution into 900-10000 pts. wt. chemical fertilizer and stir; (C) adding 10-50 pts. wt. boric acid and stir until a gel is formed; and (D) processing the gel into granules and air-dried to obtain a slow-release fertilizer containing polyvinyl alcohol, boric acid and graphene.