Water-soluble mixed fertilizer for delaying vigorous growth of crops and promoting flower bud differentiation and fertilizing method thereof

The invention discloses a water-soluble mixed fertilizer for delaying vigorous growth of crops and promoting flower bud differentiation and a fertilizing method thereof, and belongs to the technical field of fertilizer preparation and application, the water-soluble mixed fertilizer comprises a medium element water-soluble fertilizer containing calcium, magnesium and nitrogen and a trace element water-soluble fertilizer containing boron and molybdenum; the medium element water-soluble fertilizer and the trace element water-soluble fertilizer are proportioned according to a ratio of 1: 1, and the medium element water-soluble fertilizer and the trace element water-soluble fertilizer are respectively diluted to 500 times and are used when being prepared. Crops are managed according to normal cultivation measures and phenology, when the crops enter the initial vegetative growth stage, after the herbaceous vegetables revive seedlings and survive and fruit trees sprout and expand leaves, treatment is conducted throu