Table 1.

Experimental treatments settings.

Samples	Biochar (%)	Bacillus clausii Suspension (1 × 108 CFU mL−1) (mL)	Lolium perenne L.
CK	×	×	√
BC	×	10	√
B	2	×	√
FeB	2	×	√
BBC	2	10	√
FeBBC	2	10	√
Soil (g)	1200
Lolium perenne L. (Number)	50
Incubation cycle (d)	56

Note: CK: control; BC: Bacillus clausii; B: biochar; FeB: Fe-modified biochar; BBC: biochar combined with Bacillus clausii; FeBBC: Fe-modified biochar combined with Bacillus clausii.