▎ 摘　　要

NOVELTY - Selenium-enriched auxin comprises 5-10 pts. wt. melatonin, 20-36 pts. wt. borax, 15-20 pts. wt. sodium selenite, and 0.5-1.0 pts. wt. graphene oxide. USE - Used as selenium-enriched auxin. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) foliar fertilizer comprises Hoagland nutrient liquid and the selenium-enriched auxin obtained by configuring; (2) preparing foliar fertilizer comprising taking melatonin, borax, sodium selenite, graphene oxide prepared selenium- enriched auxin, Hoagland nutrient liquid and the uniformly to obtaining the selenium-enriched auxin fertilizer ratio of 1-2:1; and (3) selenium-enriched rape planting method comprising applying at least one time, the foliar fertilizer for rape in five leaves period, the bolting period the picking of the rape sprout stem.