Impacts of Biochar on Physical Properties and Erosion Potential of a Mudstone Slopeland Soil
Table 1
General properties of the studied soil and the biochar.
Properties
Soil
Rice hull biochar
Sand (%)
7.90 ± 1.20a
ND
Silt (%)
58.6 ± 5.30
ND
Clay (%)
33.5 ± 2.70
ND
pH
8.70 ± 0.05
7.90 ± 0.02
SOC (%)
0.49 ± 0.05
3.27 ± 0.05
Total carbon (%)
3.35 ± 0.53
33.0 ± 0.61
Total nitrogen (%)
0.06 ± 0.02
0.41 ± 0.03
CaCO3 (g/kg)
22.1 ± 1.29
4.56 ± 0.53
CEC (cmol kg−1)
9.83 ± 0.27
26.0 ± 1.13
Ca (cmol kg−1)
26.2 ± 1.18
2.44 ± 0.18
Na (cmol kg−1)
1.58 ± 0.07
1.26 ± 0.35
Mg (cmol kg−1)
0.63 ± 0.03
1.91 ± 0.44
K (cmol kg−1)
0.37 ± 0.03
18.7 ± 0.30
SSA (m2 g−1)
ND
15.1
ND: not determined; SOC: soil organic carbon estimated by wet oxidation method; CEC: cation exchange capacity; Ca, Mg, K, and Na were determined as the exchangeable forms; SSA: specific surface area. standard deviation.