▎ 摘　　要

NOVELTY - Fertilizer synergistic agent comprises modified graphene oxide with three-dimensional network structure of nanogel particles, where the modified graphene oxide raw material comprises 70-80 pts. wt. agriculture and forestry waste, 10-20 pts. wt. modifier, 0.5-1 pts. wt. catalyst, 1-5 pts. wt. stabilizer, 5-10 pts. wt. cyclodextrin and 0.3-0.5 pts. wt. graphene oxide. The agriculture and forestry waste includes flax waste, cotton stalk, wheat straw, reed straw, Sorghum straw or bagasse. USE - Used as fertilizer synergistic agent. ADVANTAGE - The synergistic agent is environmentally friendly, increases fertilizer use rate and improves soil environment. DETAILED DESCRIPTION - Fertilizer synergistic agent comprises modified graphene oxide with three-dimensional network structure of nanogel particles, where the modified graphene oxide raw material comprises 70-80 pts. wt. agriculture and forestry waste, 10-20 pts. wt. modifier, 0.5-1 pts. wt. catalyst, 1-5 pts. wt. stabilizer, 5-10 pts. wt. cyclodextrin and 0.3-0.5 pts. wt. graphene oxide. The agriculture and forestry waste includes flax waste, cotton stalk, wheat straw, reed straw, Sorghum straw or bagasse. The modifier is sodium polyglutamate, cis-butadiene anhydride, polyaspartic acid, konjac glucomannan, polyacrylamide or polyvinylpyrrolidone. The catalyst is ammonium persulfate, potassium persulfate or sodium bisulfite. The stabilizer is sodium carboxymethyl cellulose, guar gum, gum arabic, propylene glycol alginate, or esterified starch. An INDEPENDENT CLAIM is also included for preparing the fertilizer synergistic agent, comprising (i) adding agriculture and forestry waste into high speed shearing machine for cutting processing, water washing and removing dust, drying at 60-80 degrees C and smashing with pulverizer through 150-300 meshes sieve, (ii) placing the agriculture and forestry waste powder into reaction kettle in closeness, plasma irradiating for 2-6 minutes, setting discharge circuit power at 250-300 W and vacuum degree 12-15 pa, (iii) adding water, stirring and dissolving modifying agent, adding stabilizer and catalyst to the modified agriculture and forestry waste powder, placing into ultrasonic wave generator and carrying out ultrasonic treatment for 15-30 minutes to obtain nano composite gel, where the acoustic power is 400-600 W and field strength is 500-1000 W/cm2, (iv) mixing the nano composite gel and cyclodextrin, adding graphene oxide, stirring and drying.