Vine growth, canopy density, crop yield, and fruit soluble solids of vertical-, lyre-, and GDC-trellised Chenin blanc grapevines, Davis, California.
| Trellis-training system | ||||
|---|---|---|---|---|
| Parameter | Vertical | Lyre | GDC | Signif. |
| aMeans followed by different letters in rows indicates significant differences at the indicated significance level. | ||||
| Total shoots/vine | 62.2 aa | 68.1 a | 77.1 b | 0.007 |
| Shoots/m canopy length | 28.3 a | 15.5 b | 17.5 b | 0.01 |
| Leaf area (m2)/m canopy length | 9.9 a | 5.0 b | 3.4 c | 0.01 |
| Crop yield/vine (kg) | 35.4 a | 43.7 b | 41.3 b | 0.01 |
| Pruning wt/vine (kg) | 4.4 a | 5.1 b | 3.4 c | 0.05 |
| Pruning wt/canopy length (kg/m) | 1.8 a | 1.0 b | 0.7 b | 0.05 |
| Crop yield/pruning wt ratio (kg/kg) | 8.0 a | 8.5 a | 12.1 b | 0.05 |
| Leaf area/crop wt (m2/kg) | 0.68 a | 0.55 b | 0.40 c | 0.01 |
| Total soluble solids (B) | 19.8 a | 21.6 b | 20.6 c | 0.02 |