Table 2.
Photons and electric power consumption for producing per unit weight of lettuce harvested at 49 DAS. p: photons consumed for producing per gram of lettuce in a unit of planting area; k:electric energy consumed for producing per gram of lettuce in a unit of planting area.
| Treatment | p(mol·g−1) | K(MJ·g−1) | ||
|---|---|---|---|---|
| Dry weight | Fresh weight | Dry weight | Fresh weight | |
| 100%R | 4.11 | 0.14 | 2.44 | 0.09 |
| 90%R | 2.92 | 0.09 | 1.67 | 0.05 |
| 80%R | 4.24 | 0.12 | 2.38 | 0.07 |
| 70%R | 4.37 | 0.14 | 2.40 | 0.08 |
| 60%R | 5.09 | 0.18 | 2.74 | 0.09 |
| 50%R | 5.60 | 0.17 | 2.94 | 0.09 |
| 40%R | 5.23 | 0.16 | 2.69 | 0.08 |
| 30%R | 6.49 | 0.20 | 3.26 | 0.10 |
| 20%R | 8.01 | 0.28 | 3.93 | 0.14 |
| 10%R | 8.57 | 0.28 | 4.10 | 0.14 |
| 0%R | 6.39 | 0.25 | 3.02 | 0.12 |