Liquid fertilizer for resisting drought and preserving moisture and fertility and preparation method thereof

The invention discloses a liquid fertilizer for resisting drought and preserving moisture and fertility, belongs to the technical field of fertilizer. Each 1L of the liquid fertilizer comprises the following raw materials: 60-90 g of fulvic acid, 50-80 g of a nitrogenous fertilizer (counted by N), 100-120 g of a phosphatic fertilizer (counted by P2O5), 50-80 g of a potash fertilizer (counted by K2O), 5-8 g of microelement and the balance of water; the corresponding preparation method comprises the following steps: adding the nitrogenous fertilizer, the potash fertilizer, the phosphatic fertilizer and the fulvic acid into water, stirring for dissolving, adding the microelement, stirring for dissolving, diluting with water to 1 L, uniformly stirring, and filling to obtain the liquid fertilizer. According to the liquid fertilizer provided by the invention, fulvic acid, the nitrogenous fertilizer, the phosphatic fertilizer, the potash fertilizer and the microelement in the chelating state are mixed for dissolving to form the chelated liquid fertilizer that is nutritionally balanced, better in fluidity, and stable and uniform; besides, after application of the liquid fertilizer in soil, both the water-holding capacity and the degree of porosity are improved, the growth of roots of crops in soil is promoted, and the yield-increasing effect of crops is good.