▎ 摘　　要

NOVELTY - Preparation of water retention-slow release fertilizer gel with rigid structure comprises preparing tea polyphenol modified graphene by adding graphene oxide and tea polyphenol into deionized water, ultrasonically dispersing uniformly and reacting, after finishing the reaction, centrifuging and separating the reaction product, washing, and drying to obtain tea polyphenol modified graphene; and adding the tea polyphenol modified graphene into deionized water, ultrasonically dispersing uniformly, adding initiator potassium persulfate, stirring and activating, slowly adding acrylic acid, acrylamide and potassium phosphate amino carbon nanotube at 0-5 degrees C, using alkali to adjust the neutralization degree of the solution at 80-90%, heating and stirring uniformly, adding crosslinking agent N,N'-methylene-bis-acrylamide to react for 3-5 hours, after finishing the reaction, filtering the reaction product, washing and dialyzing and purifying. USE - The method is for preparation of water retention-slow release fertilizer gel with rigid structure (claimed). ADVANTAGE - The release of the fertilizer and water absorption and water retention of the polymer can be carried out at the same time, solving the problem that the fertilizer release and water absorption are completely separated into two stages. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for water retention-slow release fertilizer hydrogel with rigid structure.