The eight treatments included (1) control (without bacteria or fertilizer addition), (2) N fertilizer (40 mg N kg−1 soil), (3) P fertilizer (20 mg P kg−1 soil), (4) NP fertilizer (40 mg N kg−1 soil+20 mg P kg−1 soil), (5) Bacillus RC01, (6) Bacillus RC02, (7) Bacillus RC03, and (8) Bacillus M-13.