Fulvic acid silicon fertilizer

The invention relates to a fertilizer, and particularly relates to a fulvic acid silicon fertilizer which solves the technical problem of high input cost per mu caused by poor particle disintegrability, slow dispersity and poor water solubility of the existing silicon fertilizer. The fulvic acid silicon fertilizer is prepared from silicon raw materials, urea, fulvic acid, magnesium oxide powder and clay. A large number of field experiments verify that the application amount of 5 kilograms per mu can meet the requirements of crops, and the application amount of 5 kilograms per mu ensures that the fulvic acid silicon fertilizer is less than other silicon fertilizer varieties in application amount, thereby achieving the advantages that the input cost per mu is low and the crop yield can be obviously improved; and thorough the large-area demonstration of rice, the yield of the rice can be increased by 5.2-14.8% and is increased by 9.8% on the average. The fertilizer has the characteristics that the physical behavior is favorable, the solubility is high, the water solubility is fast, rice can absorb the fertilizer more easily, etc., and solves the problems of poor particle disintegrability, slow dispersity and poor water solubility of the common silicon fertilizer.