Table 3 Effects of crop residue incorporation and K fertilization on soil MBC/SOC ratio (%)
Treatment | Nanjing | Dafeng | ||||||
|---|---|---|---|---|---|---|---|---|
SS | FS | BS | BOS | SS | FS | BS | BOS | |
Control | 2.95 ± 0.20b | 3.94 ± 0.13b | 4.96 ± 0.18b | 3.45 ± 0.17b | 3.47 ± 0.18b | 4.07 ± 0.11b | 4.77 ± 0.24b | 4.06 ± 0.20b |
W0C1 | 3.01 ± 0.13b | 3.99 ± 0.25b | 5.02 ± 0.22b | 3.63 ± 0.14b | 3.68 ± 0.18ab | 4.31 ± 0.11a | 5.05 ± 0.14b | 4.09 ± 0.06b |
W1C0 | 3.01 ± 0.15b | 4.08 ± 0.08ab | 5.02 ± 0.23b | 3.57 ± 0.16b | 3.52 ± 0.06b | 4.36 ± 0.10a | 4.87 ± 0.15b | 4.26 ± 0.08ab |
W1C1 | 3.34 ± 0.20a | 4.36 ± 0.25a | 5.87 ± 0.25a | 4.15 ± 0.11a | 3.86 ± 0.11a | 4.49 ± 0.13a | 5.44 ± 0.11a | 4.49 ± 0.20a |
K150 | 3.01 ± 0.15b | 3.98 ± 0.15b | 5.04 ± 0.17b | 3.50 ± 0.17b | 3.57 ± 0.06b | 4.27 ± 0.11ab | 4.91 ± 0.18b | 4.20 ± 0.09b |
K300 | 3.03 ± 0.18b | 3.96 ± 0.20b | 5.10 ± 0.19b | 3.53 ± 0.13b | 3.56 ± 0.18b | 4.33 ± 0.14a | 4.90 ± 0.22b | 4.15 ± 0.08b |
F value | 2.06 | 2.14 | 8.23** | 8.83** | 3.06 | 4.02* | 5.37** | 4.12* |