Furthermore, by applying ASU to the base fertilizers, the ratio of nitrogen in seeds increased from 67.88% to 74.52% for(15NH4)2SO4 and from 66.13% to 73.54% for 15NH4HCO3, while the ratio of nitrogen in leaves decreased correspondingly.

• 植株中基肥氮在籽粒中的比率；硫铵的为67.；88%25；碳铵的为66