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Nitrogen loses as nitrous oxide in response to urea supplementation with and without biochar and/or urease inhibitor.
| Treatments | Total N2O losses (kg ha−1) | N lost as N2O (% of the applied N) | % Changes in N2O relative to urea |
|---|---|---|---|
| Control | 0.4 ± 0.12a | – | – |
| Urea | 1.7 ± 0.34e | 1.4 | – |
| Biochar | 0.6 ± 0.15b | – | |
| Urea + biochar | 1.3 ± 0.22d | 1.0 | − 24 |
| Urea + biochar + UI | 0.8 ± 0.17c | 0.40 | − 53 |
Means followed by same letter(s) within columns are statistically non-significant (p < 0.05).
