pH | Net nitrification rate (mg kg−1 day−1) | |||
---|---|---|---|---|
Control | Urea | Urea + nitrapyrin | Urea + NBPT | |
3.97 | 3.79 ± 0.11c | 6.56 ± 0.13a | 5.58 ± 0.09b | 5.65 ± 0.07b |
4.82 | 3.55 ± 0.09d | 8.21 ± 0.09a | 7.34 ± 0.08c | 7.68 ± 0.10b |
6.07 | 4.18 ± 0.05d | 5.21 ± 0.10a | 5.02 ± 0.10b | 4.33 ± 0.09c |
7.04 | 0.80 ± 0.09b | 0.99 ± 0.07a | 0.97 ± 0.01a | 0.79 ± 0.06b |