Table 2 Basic characteristics of the biochars used in the study
From: Effect of biochar addition on legacy phosphorus availability in long-term cultivated arid soil
Biochar | pH | EC (ds m−1) | Total C (%) | Total N (%) | Total P (%) | BET surface area (m2 g−1) | |
|---|---|---|---|---|---|---|---|
Feedstock | Pyrolysis temperature (°C) | ||||||
Sewage sludge | 300 | 6.72 | 1.07 | 33.04 | 4.37 | 1.09 | 0.59 |
Sewage sludge | 500 | 8.35 | 0.80 | 20.59 | 2.26 | 1.80 | 11.13 |
Sewage sludge | 700 | 11.28 | 0.95 | 17.84 | 0.99 | 1.94 | 12.17 |
Olive mill pomace | 300 | 8.71 | 3.25 | 65.8 | 1.66 | 0.28 | 2.60 |
Olive mill pomace | 500 | 9.56 | 6.91 | 68.41 | 1.21 | 0.44 | 4.32 |
Olive mill pomace | 700 | 9.63 | 7.63 | 65.9 | 1.24 | 0.50 | 9.28 |
Chicken manure | 300 | 7.30 | 7.97 | 50.39 | 8.48 | 1.93 | 3.54 |
Chicken manure | 500 | 10.37 | 12.60 | 48.44 | 3.90 | 3.36 | 5.77 |
Date palm residues | 300 | 6.84 | 7.27 | 55.31 | 0.49 | 0.05 | 3.60 |
Date palm residues | 500 | 8.62 | 6.76 | 66.54 | 0.39 | 0.06 | 142.94 |
Date palm residues | 700 | 10.56 | 18.48 | 67.16 | 0.51 | 0.12 | 255.08 |