Table 11.
The interactive effects of lettuce variety, light quality and three replacement methods of nutrient solution on the transpiration rate and stomatal conductance in lettuce plants.
| Variety | Light | Transpiration rate (mol (H2O) m−2 s−1) (E) | Stomatal conductance (mol H2O m−2 s−1) (gs) | ||||
|---|---|---|---|---|---|---|---|
| Complete replacement | Based on EC | Based on plant needs | Complete replacement | Based on EC | Based on plant needs | ||
| Lollo Rossa | White | 3.08 efgh | 3.92 cdef | 5.46 abc | 0.12def | 0.18def | 0.21cde |
| Blue | 4.14 bcdef | 4.44 bcdef | 5.22 abcd | 0.16def | 0.32b | 0.33b | |
| Red/Blue | 2.91 fgh | 4.52 bcdef | 5.43 abc | 0.09f | 0.31b | 0.40ab | |
| Red | 4.52 bcdef | 3.96 cdef | 5.37 abc | 0.18def | 0.13def | 0.34ab | |
| Lollo Bionda | White | 3.54 defg | 4.01 cdef | 5.86 ab | 0.22cd | 0.15def | 0.40ab |
| Blue | 4.01 cdef | 1.87 h | 6.47 a | 0.113ef | 0.31b | 0.43a | |
| Red/Blue | 3.02 efgh | 1.94 gh | 4.70 bcde | 0.116def | 0.113ef | 0.21de | |
| Red | 3.57 defg | 4.15 bcdef | 4.77 abcde | 0.116def | 0.16def | 0.22cd | |
Values are means ± SE of three replicates. Different letters in each column show significant differences at P ≤ 0.05 (Duncan’s test).