Polyion synergia stabilized urea ammonium nitrogen fertilizer and preparation method thereof

The invention belongs to the field of fertilizers, and particularly relates to a polyion synergia stabilized urea ammonium nitrogen fertilizer and a preparation method thereof. The urea ammonium nitrogen fertilizer comprises the following components by weight percent: 32.0-75.0% of urea, 20.0-65.0% of ammonium nitrogen fertilizer, 0.0-10.0% of various medium nutrient elements necessary to plants, 0.0-8.0% of various micro nutrient elements necessary to plants, 0.5-50 per millof polyion synergist, 0.0-10.0% of nutrient conditioner, 0.01-10.0% of plant growth substance, and 0.5-8.0% of nitrogen stabilizer. Compared with common urea ammonium nitrogen fertilizer, in the yield-increasing potential range of the crops, the fertilizer can help to increase the yield of food crop by 10-30%, vegetable crop by 30-100% and fruit by 10-50% with the same application amount, can save 10-30% of fertilizer at most for the same target yield, and has a long fertilizer efficiency period of more than 120 days. The polyion synergia stabilized urea ammonium nitrogen fertilizer can be used for saving a large amount of resources and energies consumed in production of the fertilizer, thus being an ideal, energy-saving and emission reduction new nitrogen manure product.