| 来源 | 光合参数 | 平方和 | df | 均方 | F | 显著性 |
| 不同海拔 | Pn | 0.186 | 1 | 0.186 | 0.452 | 0.505 |
| Ci | 9811.00 | 1 | 9811.00 | 9.629** | 0.00 | |
| Tr | 0.03 | 1 | 0.03 | 1.553 | 0.22 | |
| Gs | 0 | 1 | 0 | 0.071 | 0.791 | |
| WUE | 6.684 | 1 | 6.684 | 1.291 | 0.263 | |
| 月份 | Pn | 14.69 | 3 | 4.897 | 127.744** | 0 |
| Ci | 38,504.01 | 3 | 12,834.67 | 6.968** | 0.00 | |
| Tr | 0.27 | 3 | 0.09 | 7.173** | 0.00 | |
| Gs | 0.05 | 3 | 0.00 | 11.37** | 0.00 | |
| WUE | 17.287 | 3 | 5.762 | 1.115 | 0.356 |