Table 2.
Parameters derived from the modulated 820 nm reflection (MR/MRO) of the two maize hybrids under different planting densities. VPSI: maximum slope decrease of MR/MRO; VPSII-PSI: maximum slope increase of MR/MRO; VPSII = VPSI + VPSII-PSI.
| VPSI | VPSII-PSI | VPSII | ||
|---|---|---|---|---|
| 2019 | Zhengdan958 | |||
| D1 | 1.0045 ± 0.00018a | 1.0055 ± 0.00022a | 2.0100 ± 0.00038a | |
| D2 | 1.0039 ± 0.00018ab | 1.0047 ± 0.00025ab | 2.0086 ± 0.00042ab | |
| D3 | 1.0037 ± 0.00016b | 1.0046 ± 0.00022b | 2.0083 ± 0.00037b | |
| D4 | 1.0033 ± 0.00013b | 1.0042 ± 0.00021b | 2.0076 ± 0.00033b | |
| Xianyu335 | ||||
| D1 | 1.0032 ± 0.00014a | 1.0037 ± 0.00015a | 2.0069 ± 0.00029a | |
| D2 | 1.0029 ± 0.00009ab | 1.0035 ± 0.00021a | 2.0064 ± 0.00041ab | |
| D3 | 1.0028 ± 0.00014ab | 1.0033 ± 0.00014a | 2.0061 ± 0.00027ab | |
| D4 | 1.0023 ± 0.00018b | 1.0026 ± 0.00020b | 2.0049 ± 0.00037b | |
| 2020 | Zhengdan958 | |||
| D1 | 1.0069 ± 0.00022a | 1.0075 ± 0.00025a | 2.0144 ± 0.00047a | |
| D2 | 1.0061 ± 0.00026ab | 1.0065 ± 0.00028ab | 2.0126 ± 0.00053ab | |
| D3 | 1.0058 ± 0.00045ab | 1.0059 ± 0.00041b | 2.0118 ± 0.00086b | |
| D4 | 1.0053 ± 0.00025b | 1.0055 ± 0.00031b | 2.0109 ± 0.00055b | |
| Xianyu335 | ||||
| D1 | 1.0074 ± 0.00042a | 1.0080 ± 0.00049a | 2.0154 ± 0.00091a | |
| D2 | 1.0070 ± 0.00018ab | 1.0078 ± 0.00020a | 2.0148 ± 0.00037ab | |
| D3 | 1.0061 ± 0.00027bc | 1.0069 ± 0.00022a | 2.0130 ± 0.00049bc | |
| D4 | 1.0060 ± 0.00021c | 1.0060 ± 0.00027b | 2.0127 ± 0.00048c |
Note: Different letters (a, b, c) indicate significant differences between different densities within the hybrid at the 0.05 level.