Method for preparing foliar fertilizer by recovering nitrogen element from high-ammonia-nitrogen wastewater

The invention relates to the technical field of fertilizers, in particular to a method for preparing a foliar fertilizer by recovering nitrogen from high-ammonia-nitrogen wastewater, and the foliar fertilizer is prepared from 45-80 g/L of nitrogen, 20-25 g/L of phosphorus, 15-25 g/L of potassium, 2-5 g/L of magnesium, 1-2 g/L of iron, 0.5-1 g/L of copper and 0.5-1 g/L of boron according to the element mass concentration. According to the invention, the nitrogen element recovered from the high-ammonia-nitrogen wastewater by a membrane absorption method is creatively combined with multiple nutrient elements, and the prepared foliar fertilizer is beneficial to growth and development of crops, improves the stress resistance and lodging resistance of the crops, effectively improves the fruit quality, supplements trace elements required by the crops, and has a good yield increasing effect. 本发明涉及肥料技术领域，具体为一种从高氨氮废水中回收氮元素制备叶面肥的方法，按元素质量浓度计，配方包括：氮元素45-80g/L，磷元素20-25g/L，钾元素15-25g/L，镁元素2-5g/L，铁元素1-2g/L，铜元素0.5-1g/L，硼元素0.5-