The 1:1:1 type of NPK compound was favorable accumulation of nitrate in flowering stalk compared to 2:1:1 type of Superstar.

• 施用均衡型氮磷钾复合肥(1:1:1型)的菜芯的硝酸盐含量明显大于施用高氮型(2:1:1型)的含量。