Fertilizer applicable to lateral deep fertilization technology of rice as well as preparation method and application of fertilizer

The invention discloses a fertilizer suitable for a rice side deep fertilization technology and a preparation method and application thereof, and belongs to the technical field of fertilizers. The core is prepared from the following raw materials in parts by weight: 10 to 20 parts of monoammonium phosphate, 10 to 20 parts of potassium chloride, 10 to 20 parts of diatomite, 50 to 80 parts of urea, 5 to 10 parts of sorbitol, 2 to 6 parts of calcium carbonate, 5 to 10 parts of yeast powder, 1 to 3 parts of seaweed essence and 0.02 to 0.06 part of microbial agent. The preparation method of the coated slow-release fertilizer comprises the following steps: (1) drying and polishing the granulated fertilizer in a rotary drum dryer until the average moisture content of the granulated fertilizer is 0.8%; and (2) atomizing the coating liquid on the surface of the granular fertilizer dried in the step (1), and curing to obtain the fertilizer. Tests show that the release of the fertilizer can be effectively slowed down, a