From: N2O emission and its influencing factors in subtropical streams, China
Sampling season | River | Sampling area | s-NO3− (mg kg−1) | s-NH4+ (mg kg−1) | SOC (g kg− 1) | SOC/NO3− |
---|---|---|---|---|---|---|
High flow season | Jinshui River | Downstream | 6.04 ± 2.12a | 5.74 ± 1.95 | 7.42 ± 1.87b | 1.30 ± 0.39 |
Midstream | 5.97 ± 4.47b | 4.83 ± 0.98 | 3.14 ± 0.48c | 2.09 ± 1.66 | ||
Upstream | 6.70 ± 2.34a | 5.99 ± 1.39 | 10.06 ± 0.80a | 1.80 ± 0.49 | ||
Qi River | Downstream | 6.79 ± 0.42ab | 6.17 ± 1.24b | 5.55 ± 2.39 | 1.35 ± 0.39 | |
Midstream | 7.98 ± 0.74a | 8.61 ± 1.05a | 7.93 ± 6.14 | 0.65 ± 0.68 | ||
Upstream | 5.33 ± 1.74b | 5.52 ± 0.55b | 4.38 ± 0.72 | 1.03 ± 0.49 | ||
Normal flow season | Jinshui River | Downstream | 1.34 ± 0.09 | 0.80 ± 0.47 | 3.47 ± 2.05 | 2.62 ± 1.61 |
Midstream | 0.82 ± 0.25 | 0.89 ± 0.55 | 5.74 ± 4.53 | 4.85 ± 4.71 | ||
Upstream | 1.22 ± 0.07 | 0.60 ± 0.10 | 9.48 ± 3.88 | 5.09 ± 2.83 | ||
Qi River | Downstream | 0.98 ± 0.22 | 1.19 ± 0.46 | 2.58 ± 3.43 | 7.01 ± 3.11 | |
Midstream | 0.83 ± 0.32 | 1.13 ± 1.02 | 1.79 ± 1.13 | 5.32 ± 2.34 | ||
Upstream | 1.06 ± 0.73 | 1.26 ± 0.79 | 5.50 ± 3.53 | 7.50 ± 6.14 | ||
Low flow season | Jinshui River | Downstream | 0.60 ± 0.16 | 3.43 ± 0.97 | 2.64 ± 1.11 | 4.59 ± 2.29 |
Midstream | 1.00 ± 0.07 | 2.19 ± 1.14 | 5.21 ± 3.46 | 3.32 ± 3.25 | ||
Upstream | 1.03 ± 0.37 | 2.44 ± 1.92 | 2.72 ± 0.40 | 5.36 ± 0.75 | ||
Qi River | Downstream | 1.81 ± 1.43 | 2.89 ± 0.67 | 2.87 ± 1.75 | 5.16 ± 1.21a | |
Midstream | 0.94 ± 0.25 | 2.10 ± 0.72 | 1.47 ± 0.64 | 5.06 ± 0.27a | ||
Upstream | 0.58 ± 0.32 | 1.73 ± 0.59 | 3.26 ± 1.00 | 2.74 ± 4.39b |