Table 1.
The photon flux density (PFD) at different wavebands of the four treatments.
| Treatment | UVA1(µmol m−2 s−1) | PAR2(µmol m−2 s−1) | FR3(µmol m−2 s−1) | Total incident PFD (µmol m−2 s−1) | DLI4(mol m−2) | UVA/PAR5 (%) |
|---|---|---|---|---|---|---|
| Control | 0 | 230 | 7 | 237 | 13.65 | 0 |
| UVA-10 | 10 | 230 | 7 | 247 | 14.23 | 4.35 |
| UVA-20 | 20 | 230 | 7 | 257 | 14.80 | 8.70 |
| UVA-30 | 30 | 230 | 7 | 267 | 15.38 | 13.05 |
1UVA radiation, 315–400 nm. 2Photosynthetic active radiation, 400–700 nm. 3Far-red radiation, 700–750 nm. 4Daily light integral, 315–750 nm. 5UVA/PAR was 7%–8% in natural sunlight measured in Beijing.