The results showed that the NRA was high in the leaves and that the NRA was effected obviously by development, fertilization and seed-removing.

• 在非诱导条件下，用活体法测定幼苗叶片的硝酸还原酶活性(NRA)表明，叶片具有较高的NRA，而且，不同的发育阶段、施肥和切除种子都明显影响叶片的NRA。