▎ 摘　　要

NOVELTY - Foliar nutritional agent comprises 100 pts. wt. basic nutrients and 5-8 pts. wt. ammonium polyphosphate-organic bentonite/graphene complex nanomaterial additive composition. USE - The foliar nutritional agent is useful for providing antibacterial and fertilization effect. ADVANTAGE - The foliar nutritional agent is rich in selenium, has excellent dispersibility and uniformity and thermal and optical properties and improves photosynthetic response, promotes healthy growth and enhances products of vegetables and avoids the local concentration difference. DETAILED DESCRIPTION - Foliar nutritional agent comprises 100 pts. wt. basic nutrients and 5-8 pts. wt. ammonium polyphosphate-organic bentonite/graphene complex nanomaterial additive composition. The ammonium polyphosphate-organic bentonite/graphene complex nanomaterial is prepared by pouring 70-85 %mass phosphoric acid into the reactor, heating and stirring content, adding urea and organic bentonite, when the temperature rises to 75-80 degrees C, then adding nanographene, when the temperature rises to 110-120 degrees C, continue heating the content for 120-130 degrees C, stirring and reacting content for 10-20 minutes, treating content at 160-180 degrees C for 3-5 hours, cooling the content to room temperature and subjecting content to nano-pulverization process to obtain the product. An INDEPENDENT CLAIM is included for method of preparing foliar nutritional agent which involves (a) preparing ammonium polyphosphate-organic bentonite/graphene complex nanomaterial as mentioned above, (b) heating basic nutrients at 30-35 degrees C and continue stirring the content for 20-30 minutes, then adding formulated amount of ammonium polyphosphate-organic bentonite/graphene complex nanomaterial and uniformly stirring content at not less than 1000 revolutions per minute for more than 30 minutes to obtain semi-finished product and (c) then adding and mixing semi-finished product with bactericide, ultrasonically treating content for 10-20 minutes, filtering content and removing impurities to obtain the product.