Variables | Ratios (H. tuberosus: A. adenophora) | ||||
---|---|---|---|---|---|
4:0 | 2:1 | 1:1 | 1:2 | 0:4 | |
July | |||||
 H. tuberosus (µmol CO2 m−2 s−1) | 15.59 ± 0.06a | 15.65 ± 0.09a | 15.57 ± 0.10a | 15.69 ± 0.08a | – |
 A. adenophora Pn (µmol CO2 m−2 s−1) | – | 9.06 ± 0.08b | 9.10 ± 0.06b | 9.17 ± 0.03ab | 9.27 ± 0.07a |
August | |||||
 H. tuberosus (µmol CO2 m−2 s−1) | 18.42 ± 0.09c | 18.69 ± 0.07b | 18.84 ± 0.06a | 18.85 ± 0.03a | – |
 A. adenophora Pn (µmol CO2 m−2 s−1) | – | 8.98 ± 0.05d | 10.10 ± 0.02c | 12.59 ± 0.04b | 13.26 ± 0.07a |
September | |||||
 H. tuberosus (µmol CO2 m−2 s−1) | 20.11 ± 0.18d | 20.80 ± 0.11c | 21.49 ± 0.12b | 21.83 ± 0.09a | – |
 A. adenophora Pn (µmol CO2 m−2 s−1) | – | 9.52 ± 0.12d | 11.46 ± 0.13c | 13.70 ± 0.13b | 15.51 ± 0.17a |
October | |||||
 H. tuberosus (µmol CO2 m−2 s−1) | 18.39 ± 0.06c | 18.46 ± 0.07bc | 18.53 ± 0.07b | 18.71 ± 0.05a | – |
 A. adenophora Pn (µmol CO2 m−2 s−1) | – | 9.28 ± 0.08d | 10.46 ± 0.05c | 12.64 ± 0.08b | 14.26 ± 0.06a |