Table 3.
Effect of different supplemental LED light spectra (red/blue, 3:1; R: B, with a peak 656 nm, blue, with a peak at 450 nm, red, with a peak at 656 nm, control (ambient light)) on vegetative growth characteristics (LFM: leaf fresh mass, CFM: crown fresh mass, RFM: root fresh mass, LDM: leaf dry mass, CDM: crown dry mass, RDM: root dry mass, CD: crown diameter, RL: root length, LN: leaf number) of four strawberry cultivars. The photosynthetic photon flux density (PPFD) was 215 ± 5 mol m− 2 s− 1. The photoperiod of 11/13 h (day/ night) was maintained
| Strawberry cultivar |
Light spectrum |
LFM (g plant− 1) |
CFM (g plant− 1) |
RFM (g plant− 1) |
LDM (g plant− 1) |
CDM (g plant− 1) |
RDM (g plant− 1) |
CD (mm) |
RL (cm) |
LN (plant− 1) |
|---|---|---|---|---|---|---|---|---|---|---|
| “Sabrina” | Control | 12.32 ± 0.42hi | 3.08 ± 0.30 h | 3.42 ± 0.24 g | 5.03 ± 0.58 fg | 0.55 ± 0.02 h | 2.96 ± 0.40d | 10.52 ± 0.27de | 14.00 ± 0.76 g | 67 ± 10.5def |
| Red | 10.81 ± 0.60i | 5.28 ± 0.51c-g | 3.67 ± 0.13 g | 4.94 ± 0.50 g | 0.72 ± 0.07gh | 3.27 ± 0.05d | 12.44 ± 0.41a-e | 15.42 ± 0.58 fg | 66 ± 3.6def | |
| Blue | 16.45 ± 1.11f-i | 3.95 ± 0.77fgh | 7.53 ± 0.50f | 8.79 ± 0.87c-f | 0.81 ± 0.10fgh | 3.69 ± 0.29d | 11.54 ± 0.85b-e | 14.83 ± 0.83 fg | 77 ± 7.2cde | |
| Red/Blue | 14.15 ± 1.77ghi | 3.41 ± 0.38gh | 8.15 ± 0.11f | 7.09 ± 1.48efg | 0.68 ± 0.07gh | 4.61 ± 0.27 cd | 10.28 ± 0.75e | 16.33 ± 0.17efg | 67 ± 10.4def | |
| “Albion” | Control | 18.69 ± 0.79 fg | 3.89 ± 0.44fgh | 9.54 ± 0.73f | 6.95 ± 0.20efg | 0.83 ± 0.07fgh | 4.64 ± 0.50 cd | 11.59 ± 0.88b-e | 16.67 ± 1.01d-g | 69 ± 4.6de |
| Red | 17.13 ± 0.38fgh | 4.24 ± 0.30e-h | 7.54 ± 0.58f | 6.47 ± 0.58 fg | 0.78 ± 0.06fgh | 3.42 ± 0.25d | 9.95 ± 0.38e | 15.42 ± 0.71 fg | 61 ± 4.4ef | |
| Blue | 17.37 ± 0.09fgh | 5.66 ± 0.44c-f | 10.23 ± 0.13ef | 7.63 ± 0.58d-g | 1.01 ± 0.09efg | 5.05 ± 0.41 cd | 11.94 ± 0.78a-e | 17.17 ± 0.67c-f | 77 ± 12.5cde | |
| Red/Blue | 20.33 ± 1.51f | 5.9 ± 0.10b-f | 16.82 ± 0.93bc | 8.79 ± 0.75c-f | 1.17 ± 0.8def | 6.87 ± 1.18bc | 13.03 ± 0.73a-d | 19.50 ± 0.29a-d | 65 ± 7.8ef | |
| “Parous” | Control | 40.77 ± 1.11ab | 6.12 ± 0.53b-e | 13.64 ± 1.29de | 10.39 ± 0.78bcd | 1.01 ± 0.12efg | 6.79 ± 0.46bc | 14.31 ± 1.15a | 21.67 ± 0.88ab | 104 ± 11.1b |
| Red | 40.52 ± 2.65ab | 6.70 ± 0.54a-d | 18.86 ± 3.04a | 11.24 ± 3.16a-d | 1.23 ± 0.09cde | 8.75 ± 1.56ab | 14.10 ± 0.65ab | 21.17 ± 1.45ab | 88 ± 8.2bcd | |
| Blue | 45.94 ± 4.5a | 6.67 ± 0.58a-d | 15.88 ± 0.22 cd | 14.33 ± 1.33a | 1.31 ± 0.13cde | 6.84 ± 0.20bc | 13.79 ± 0.84abc | 20.00 ± 0.76abc | 134 ± 17.4a | |
| Red/Blue | 40.27 ± 1.98bc | 6.80 ± 0.89a-c | 16.37 ± 1.84bcd | 12.58 ± 1.27abc | 1.42 ± 0.17bcd | 6.70 ± 1.29bc | 13.52 ± 1.07abc | 19.00 ± 1.04b-e | 96 ± 9.6bc | |
| “Camarosa” | Control | 26.64 ± 2.18e | 6.21 ± 0.56b-e | 13.21 ± 0.74de | 9.51 ± 1.36cde | 1.34 ± 0.08cde | 5.60 ± 0.26 cd | 11.18 ± 0.70cde | 21.50 ± 1.04ab | 77 ± 9.5cde |
| Red | 27.48 ± 1.82de | 7.23 ± 0.03abc | 15.34 ± 0.46 cd | 12.37 ± 0.19abc | 1.57 ± 0.21bc | 8.77 ± 1.45ab | 12.22 ± 0.22a-e | 21.33 ± 0.93ab | 100 ± 20.2b | |
| Blue | 28.24 ± 1.70 cd | 8.39 ± 0.19a | 13.60 ± 0.56 cd | 9.61 ± 0.65cde | 1.75 ± 0.24ab | 6.45 ± 1.11bc | 13.19 ± 1.32abc | 20.67 ± 0.44abc | 89 ± 14.8bc | |
| Red/Blue | 27.92 ± 2.12de | 7.88 ± 1.31ab | 15.49 ± 0.59 cd | 10.11 ± 0.32b-e | 2.06 ± 0.11a | 5.39 ± 0.25 cd | 14.18 ± 0.59ab | 22.00 ± 1.61a | 91 ± 23.6bc |
Mean separation was done by Duncan’s multiple range test and the same letter(s) in each column indicates non-significant difference at P ≤ 0.05