Even though the inoculation with Rhizobium could increase the nodulation of Dayiheidou, the nitrogen content of the soybean seedlings dropped slightly.
接种根瘤菌尽管能使大邑黑豆结瘤增加，但是大豆植株的氮含量却有轻微下降。
2
The biological effect of protectively applied nitrogen on nodulation N-fixing activity, nitrogen forms in Xyloid liquid, and amount of assimilated nitrogen in soybean were studied.