Table 5.
Main and interaction effects of biostimulant dose, application method and cultivar for projected and total root surface area in snapdragon plants.
| Treatments | Projected root area (cm2 /plant) | Total root surface area (cm2 /plant) |
|---|---|---|
| DOSE (g L−1) (D) | ||
| 0 | 136.4c | 414.2c |
| 0.1 | 221.0a | 697.6a |
| 0.2 | 172.3b | 545.3b |
| METHOD (M) | ||
| Foliar spray | 157.9b | 493.0b |
| Root drenching | 195.3a | 611.7a |
| CULTIVAR (CV) | ||
| Yellow Floral Showers | 148.2a | 468.0b |
| Red Sonnet | 204.9b | 636.7a |
| D × M | ||
| D0 × Foliar spray | 132.5d | 401.9c |
| D0 × Root drenching | 140.3d | 426.5c |
| D0.1 × Foliar spray | 193.4bc | 611.1b |
| D0.1 × Root drenching | 248.7a | 784.2a |
| D0.2 × Foliar spray | 147.9cd | 466.1c |
| D0.2 × Root drenching | 196.8b | 624.6b |
| D × CV | ||
| D0 × Yellow floral showers | 95.7d | 305.5c |
| D0 × Red sonnet | 177.1b | 522.9b |
| D0.1 × Yellow floral showers | 210.8ab | 665.6a |
| D0.1 × Red sonnet | 231.3a | 729.7a |
| D0.2 × Yellow floral showers | 138.2c | 433.1b |
| D0.2 × Red sonnet | 206.5ab | 657.6a |
| M × CV | ||
| Foliar spray × Yellow floral showers | 137.9b | 432.7b |
| Root drenching × Red sonnet | 158.4b | 553.3b |
| Foliar spray × Yellow floral showers | 177.4b | 503.3b |
| Root drenching × Red sonnet | 232.1a | 720.1a |
| SIGNIFICANCE | ||
| D | *** | *** |
| M | *** | *** |
| CV | *** | *** |
| D × M | ** | *** |
| D × CV | *** | *** |
| M × CV | ** | *** |
| D × M × CV | ns | *** |
Different letters within each column indicate significant differences according to Duncan's multiple-range test (P ≤ 0.05). ns, non significant,
**
P < 0.01 and
***
0.001, indicate level of significance.