benefit system
9.The results showed that it was benefit for the root system and nodule growth of faba bean on squaring stage and blooming stage under phosphorus and phosphorus add potassium fertilizer; The benefit was not significant for the root system and nodule growth of faba bean in all stage under potassium fertilizer; nitrogenous add phosphorus add potassium fertilizer was benefit for the root system growth, but it restrained to the nodule growth of faba bean on squaring stage and blooming stage.

