Table 6 Effect of two different C-rich biochars on soil properties

From: Evaluation of Biochar Post‐Process Treatments to Produce Soil Enhancers and Phosphorus Fertilizers at a Single Plant

Parameters Biochar application rates (wt%) Fine sand Sandy loam
WCB WSB WCB WSB
SOM (%) 0 3.25 ± 0.02 3.32 ± 0.08
0.1 3.23 ± 0.17 3.43 ± 0.25 3.33 ± 0.15 3.53 ± 0.13
0.5 3.37 ± 0.22 4.02 ± 0.26 3.94 ± 0.05 3.84 ± 0.03
1.0 3.83* ± 0.10 4.05* ± 0.19 4.09 ± 0.24 4.45 ± 0.17
2.0 4.65* ± 0.04 4.45* ± 0.04 4.74 ± 0.03 5.22 ± 0.12
5.0 6.36* ± 0.17 6.32* ± 0.28 7.06 ± 0.14 7.33 ± 0.51
Soil pH 0 6.57 ± 0.03 7.04 ± 0.00
0.1 6.57 ± 0.02 6.57 ± 0.04 7.19 ± 0.09 7.05 ± 0.02
0.5 6.67 ± 0.00 6.70 ± 0.04 7.31 ± 0.05 7.15 ± 0.02
1.0 6.73 ± 0.02* 6.96 ± 0.05* 7.35 ± 0.01 7.35 ± 0.02
2.0 6.82 ± 0.04* 7.36 ± 0.04* 7.45 ± 0.05 7.26 ± 0.01
5.0 7.41 ± 0.02* 8.21 ± 0.03* 7.47 ± 0.17 7.71 ± 0.05
Soil CEC (cmol+/kg) 0 4.68 ± 0.28 7.05 ± 0.13
0.1 5.22 ± 0.01 5.04 ± 0.74 7.32 ± 0.20 7.21 ± 1.64
0.5 6.39 ± 0.03* 5.74 ± 0.17 8.58 ± 0.30 8.41 ± 0.81
1.0 6.68 ± 0.33* 6.36 ± 0.15 10.06 ± 0.12* 10.14 ± 0.12
2.0 6.84 ± 0.12* 6.55 ± 0.86* 8.59 ± 0.10* 11.83 ± 0.45*
5.0 5.82 ± 0.08* 5.66 ± 0.09 7.50 ± 0.37 8.59 ± 0.63
WHC (%) 0 18 ± 0.36 25 ± 0.05
0.1 19 ± 0.34 18 ± 0.25 25 ± 0.05 25 ± 0.08
0.5 19 ± 0.250 19 ± 0.67 25 ± 0.19 25 ± 0.34
1.0 19 ± 0.155 19 ± 0.50 25 ± 0.19 26 ± 0.36*
2.0 20 ± 0.20* 21 ± 0.39* 26 ± 0.13* 27 ± 0.34*
5.0 23 ± 0.17* 23 ± 0.17* 29 ± 0.29* 29 ± 0.19*
  1. Mean ± standard deviation, values with * are significantly (P < 0.05) different from the control (0% biochar application rate)
  2. SOM soil organic matter, WCB woodchips biochar, WSB wheat straw biochar, CEC cation exchange capacity, WHC water holding capacity