Green-keeping foliar fertilizer for pitaya scales and application method of green-keeping foliar fertilizer

The invention relates to the technical field of plant fertilizers, in particular to a pitaya scale green-keeping foliar fertilizer and an application method thereof. The foliar fertilizer is a liquid fertilizer and comprises the following components by weight: 0.02 to 0.04 g/L of gibberellic acid, 0.0005 to 0.001 g/L of diethyl aminoethyl hexanoate, 0.00025 to 0.0005 g/L of compound sodium nitrophenolate, 0.001 to 0.0015 g/L of S-abscisic acid, 0.4 to 0.6 g/L of EDTA (Ethylene Diamine Tetraacetic Acid), 0.2 to 0.4 g/L of potassium chloride, 0.2 to 0.4 g/L of chelated titanium and 0.2 to 0.4 g/L of chelated ferrous iron. The preparation method comprises the following steps: dissolving gibberellic acid, diethyl aminoethyl hexanoate, compound sodium nitrophenolate and S-abscisic acid powder in an organic solvent, and adding water for dilution; and then EDTA, potassium chloride, chelated titanium and chelated ferrous iron are sequentially added, evenly mixed and diluted. The method has the advantages that the def