Table 4.
Effect of different light sources (HPS, HPS + LED, LED) on the net carbon assimilation measured during the first 20 min after turning on the lamps. Data are given as mean ± SE, n = 3.
| Time from Turning on the Lamps (min) |
Net Carbon Assimilation (μmol CO2 m−2 s−1) |
||
|---|---|---|---|
| Light Conditions | |||
| HPS | HPS + LED | LED | |
| 1 | 0.11 a * (±0.00) | −2.12 b (±0.15) | −2.46 b (±0.69) |
| 2 | 2.24 a (±0.01) | −0.71 b (±0.05) | −0.51 b (±0.19) |
| 3 | 4.74 a (±0.14) | 1.72 c (±0.06) | 2.71 b (±0.23) |
| 4 | 5.66 a (±0.07) | 3.27 c (±0.11) | 4.99 b (±0.10) |
| 5 | 7.29 a (±0.09) | 5.87 b (±0.06) | 6.86 a (±0.26) |
| 6 | 7.55 a (±0.07) | 6.64 b (±0.11) | 7.43 a (±0.13) |
| 7 | 8.95 a (±0.22) | 8.11 a (±0.24) | 8.22 a (±0.20) |
| 8 | 8.84 a (±0.29) | 8.86 a (±0.34) | 9.02 a (±0.28) |
| 9 | 8.99 a (±0.15) | 9.05 a (±0.24) | 9.23 a (±0.13) |
| 10 | 9.01 a (±0.12) | 9.10 a (±0.28) | 9.40 a (±0.12) |
| 11 | 8.71 a (±0.33) | 9.36 a (±0.08) | 9.44 a (±0.11) |
| 12 | 9.08 b (±0.09) | 9.75 a (±0.07) | 9.59 a (±0.12) |
| 13 | 8.76 b (±0.16) | 9.63 a (±0.13) | 9.96 a (±0.16) |
| 14 | 9.27 a (±0.17) | 9.86 a (±0.31) | 10.2 a (±0.17) |
| 15 | 9.25 b (±0.07) | 9.57 ab (±0.10) | 10.0 a (±0.16) |
| 16 | 9.12 b (±0.07) | 9.81 ab (±0.16) | 10.2 a (±0.29) |
| 17 | 9.45 b (±0.18) | 9.96 ab (±0.08) | 10.3 a (±0.20) |
| 18 | 9.57 a (±0.20) | 10.0 a (±0.16) | 10.4 a (±0.21) |
| 19 | 9.47 b (±0.15) | 10.0 ab (±0.27) | 10.5 a (±0.16) |
| 20 | 9.57 a (±0.11) | 10.0 ab (±0.19) | 10.5 a (±0.16) |
* Different lowercase letters within the column indicate a significant difference at p < 0.05 using Tukey’s test.