Table 4.
Effect of biochar application and nitrogen fertilizer reduction on the abundance of soil ammonia oxidizing and denitrifying bacteria communities.
| AOA | AOB | nirK | ni S | nosZ | |
|---|---|---|---|---|---|
| Treatment | 105 copies/g | 105 copies/g | 106 copies/g | 107 copies/g | 106 copies/g |
| Control | 2.4 ± 0.62 c | 2.44 ± 4.49 c | 8.73 ± 0.49 b | 3.02 ± 0.09 d | 0.59 ± 0.01 cd |
| N160 | 3.28 ± 0.64 c | 3.74 ± 0.16 b | 14.03 ± 1.88 a | 12.21 ± 2.65 b | 3.83 ± 0.85 a |
| N160 + BC | 4.50 ± 9.37 b | 3.84 ± 7.62 b | 10.48 ± 0.88 b | 2.69 ± 0.41 d | 1.03 ± 0.05 cd |
| N200 | 2.23 ± 7.09 c | 2.04 ± 4.99 d | 3.16 ± 1.32 c | 7.53 ± 1.39 c | 1.37 ± 0.37 c |
| N200 + BC | 3.32 ± 7.88 c | 5.09 ± 0.42 a | 5.02 ± 1.01 c | 6.85 ± 2.11 c | 1.26 ± 0.11 c |
| N240 | 2.53 ± 0.55 c | 1.73 ± 5.54 d | 2.76 ± 0.14 c | 1.51 ± 0.15 d | 0.33 ± 0.04 d |
| N240 + BC | 6.22 ± 7.96 a | 2.89 ± 3.37 cd | 10.16 ± 2.69 b | 16.34 ± 1.76 a | 2.45 ± 0.80 b |
Different lowercase letters in the same column indicate significant differences between treatments (p < 0.05).