Table 2 Biomass of Bn and Ov under different bicarbonate and nitrogen in simulated karst habitat
Group | HCO3−(mM) | B0 | B10 | ||||||
|---|---|---|---|---|---|---|---|---|---|
Nitrate (mM) | Group | N0 | N19 | N55 | N91 | N0 | N19 | N55 | N91 |
Root (mg) | Bn | 117.39 ± 1.93a | 91.83 ± 1.16a | 177.75 ± 1.62b | 261.61 ± 3.08c | 84.06 ± 1.26a | 180.55 ± 25.05b | 231.13 ± 2.27c | 322.53 ± 5.26d |
Ov | 40.21 ± 2.28a | 44.18 ± 3.78a | 58.88 ± 2.17b | 51.42 ± 1.4c | 40.1 ± 2.09a | 75.71 ± 2.75d | 121.99 ± 4.91e | 344.52 ± 7.29f | |
Stem (mg) | Bn | 346.77 ± 7.83a | 435.74 ± 11.2 ab | 767.17 ± 1.57c | 1002.09 ± 2.09d | 242.25 ± 13.73e | 430.93 ± 13.29ab | 1015.82 ± 6.77f | 1269.75 ± 29.99 g |
Ov | 50.5 ± 7.46a | 63.65 ± 2.36b | 66.9 ± 2.45b | 49.82 ± 1.28a | 53.6 ± 1.89a | 78.74 ± 1.67b | 161.01 ± 6.48c | 320.65 ± 6.79d | |
Leaves (mg) | Bn | 286.43 ± 14.88a | 448.65 ± 5.33b | 520.41 ± 2.85bc | 788.23 ± 7.34d | 220.59 ± 11.21a | 543.09 ± 18.51bc | 671.89 ± 4.44c | 1145.25 ± 34.92e |
Ov | 64.96 ± 4.30a | 76.59 ± 11.06ab | 130.36 ± 6.51c | 93.94 ± 2.42b | 105.27 ± 3.97bc | 121.13 ± 2.2c | 276.06 ± 11.1d | 456.85 ± 9.67e | |
Total biomass (mg) | Bn | 750.59 ± 9.99a | 976.23 ± 11.75b | 1465.33 ± 4.43c | 2051.93 ± 7.03d | 546.9 ± 18.45e | 1154.58 ± 32.38b | 1918.84 ± 4.99d | 2737.53 ± 36.09f |
Ov | 155.39 ± 11.07a | 197.34 ± 33.92b | 256.78 ± 11.24c | 195.53 ± 5.04b | 200.87 ± 5.04b | 273.22 ± 9.94c | 559.07 ± 22.49d | 1122.01 ± 23.75e | |
root/shoot ratio (R/S, %) | Bn | 18.55 ± 0.62a | 10.39 ± 0.15b | 13.81 ± 0.31c | 14.61 ± 0.25c | 18.16 ± 0.15d | 18.54 ± 1.34d | 13.7 ± 0.19c | 13.35 ± 0.05c |
Ov | 25.87 ± 1.35a | 22.9 ± 1.83a | 22.99 ± 0.31a | 26.35 ± 0.23ab | 25.23 ± 0.41ab | 37.87 ± 0.8c | 27.91 ± 0b | 44.31 ± 0d | |