Treatment | Abbreviation | Flow velocity (m s−1) | Time (h) | NO3−–N concentration (mg L−1) | NH4+–N concentration (μg L−1) | DIC concentration (mg L−1) | Alkalinity (μmol L−1) | pCO2 (μatm) |
---|---|---|---|---|---|---|---|---|
Add + high | A + H | 0.37 ± 0.21 | 0 | 0.33 ± 0.01 | 5.6 ± 0.4 | 9.53 ± 4.79 | 721.2 ± 83.8 | 3537 ± 2670 |
280 | 0.06 ± 0.07 | 0.03 ± 0.03 | 6.21 ± 3.18 | 571.2 ± 14.5 | 43.3 ± 34.8 | |||
Add + low | A + L | 0.11 ± 0.07 | 0 | 0.33 ± 0.03 | 6.3 ± 1.2 | 10.11 ± 5.06 | 794.8 ± 17.0 | 3270 ± 2259 |
280 | 0.13 ± 0.05 | 0.11 ± 0.12 | 6.40 ± 0.86 | 629.3 ± 60.4 | 439 ± 612 | |||
Non + high | N + H | 0.32 ± 0.22 | 0 | 0.01 ± 0.01 | 6.2 ± 1.6 | 9.85 ± 4.94 | 758.3 ± 53.0 | 1889 ± 1349 |
280 | 0.01 ± 0.00 | 0.01 ± 0.00 | 7.02 ± 3.51 | 588.9 ± 22.1 | 15.2 ± 15.8 | |||
Non + low | N + L | 0.09 ± 0.06 | 0 | 0.02 ± 0.00 | 5.8 ± 0.9 | 9.33 ± 4.78 | 719.6 ± 81.9 | 3549 ± 1943 |
280 | 0.01 ± 0.00 | 0.03 ± 0.05 | 7.25 ± 3.64 | 591.1 ± 25.1 | 383 ± 605 |