▎ 摘　　要

NOVELTY - Fertilizer for cucumber nano-carbon humic acid, comprises 15-30% urea, 15-30% calcium superphosphate, 9-18% potassium sulfate, 11-15% humic acid, 1-5% biological bacterial fertilizer, 25-35% seaweed fertilizer, 7-20% coating material, 3-15% waterproof material, and 14-25% composite nanocarbon. USE - Used as fertilizer for cucumber nano-carbon humic acid. ADVANTAGE - The fertilizer is based on porous composite nanomaterials, and can significantly improve the yield and quality of cucumber through the synergistic effect of humic acid and biological bacterial fertilizer to promote potassium fertilizer absorption. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation method of fertilizer, comprising (a) preparing nano-cuprous oxide and graphene oxide respectively, and compounding nano-cuprous oxide and graphene oxide to form composite nano-carbon; (b) drying the composite nano-carbon, and placing the dried composite nano-carbon into a granulator for granulation, and forming an inner core with nano-cuprous oxide loaded on the surface; (c) taking urea, superphosphate, potassium sulfate and humic acid and uniformly mixing to obtain mixed fertilizer I, compounding the biological bacterial fertilizer and the seaweed fertilizer to obtain the mixed fertilizer II, mixing the mixed fertilizer I and the mixed fertilizer II to obtain the mixed fertilizer III; (d) spraying the outside of the inner core to form a polyurethane film, and coating a layer of adhesive on the outside of the polyurethane film, dispersing the inner core and adding into the mixed fertilizer III and fully stirring, fully wrapping the outer surface of the polyurethane film of the inner core with the uniform mixture to obtain a double-layer fertilizer core; and (e) placing the double-layer fertilizer core into the sugar coating machine, spraying the chitosan and sodium alginate solution, and forming a chitosan coating on the surface of the double-layer fertilizer core.