Ammonium sulfate fertilizer is a widely used inorganic soil supplement, composition of N is larger than 20.5-21%, especially suitable for alkaline soil. Its active ingredients are nitrogen and sulfur. The correct use of this fertilizer can maintain the nitrogen level in the soil, and can help to improve the pH balance of alkaline soil, ammonium sulfate effect is higher than ammonium chloride, ammonium carbonate, urea and other nitrogen fertilizer.