| Light gradient | Phenological parameters | Growth parameters | ||||||
| Early stage of linear growth (d) | Final stage of linear growth (d) | Stage of linear growth (d) | The maximum linear growth rate (cm/d) | Average linear growth rate (cm/d) | Quantity of linear growth (cm) | Linear growth as a percentage of total growth (%) | ||
| CK | 52.882 | 130.353 | 77.471 | 0.060 | 0.053 | 4.058 | 57.16% | |
| 2 Needle | 76.405 | 139.119 | 62.714 | 0.166 | 0.147 | 9.122 | 57.44% | |
| 3 Needle | 80.804 | 138.065 | 57.261 | 0.273 | 0.243 | 13.698 | 57.22% | |
| 4 Needle | 64.316 | 133.632 | 69.316 | 0.155 | 0.138 | 9.443 | 56.81% | |
| 6 Needle | 69.300 | 135.150 | 65.850 | 0.189 | 0.168 | 10.892 | 57.20% | |