Nursery stock organic-inorganic compound fertilizer composition and preparing method thereof

The invention belongs to the technical field of fertilizer, and the embodiment discloses a nursery stock organic-inorganic compound fertilizer composition and a preparing method thereof. The composition is prepared from organic fertilizer and/or humic acid, urea, ammonium di-hydrogen phosphate, triple superphosphate, potassium chloride, magnesium sulfate, ferrous sulfate, manganese sulfate, copper sulfate, zinc sulfate, sodium molybdate, boric acid, potassium iodide and synergist. The raw materials of the composition are dried, smashed, mixed and granulated to obtain the fertilizer product. The fertilizer product can be applied to nursery stock planting, and compared with fertilizer products used in traditional nursery stock planting, the prepared organic-inorganic compound fertilizer composition is reasonable in matching, contains necessary microelement and is capable of effectively improving the growth condition of nursery stock and then effectively increasing the diameter at breast height and the tree height.