The amounts of ammonium nitrogen in soil by fertilizing the dicyandiamde(DCD) and NBPT-amended and the DCD and NBPT-amended large size granular of urea coated by starch acetate was the highest in all the fertilizers treatments.

• 硝化抑制剂DCD与NBPT混合涂层大颗粒尿素、醋酸酯淀粉包膜DCD与NBPT混合涂层大颗粒尿素的铵态氮含量最高；分别达到60.；22 mg kg-1土和59