The nitrogen content of the plants inoculated with SMH12, ZX20 and HN01, as well as the nitrogen content of blank control plant were 2.26%, 2.44%, 2.10%, 1.70% respectively.

• 接着，又对菌株SMH12、ZX20、HN01所接植株和空白对照植株的氮含量进行了测定。 4组植株在渝豆上的氮含量分别为2.；26%25、2