Influence of trellis system on the amount of shoot and leaf growth and crop yield of Cabernet Sauvignon. Data represents the average of three in-row vine spacings (1 m, 2 m, and 3 m) and two rootstocks (110R and O39-16) for three years, 1993–1995.
| Trellis-training system | |||||||
|---|---|---|---|---|---|---|---|
| Parameter | Vertical | Scott-Henry | TK2T | GDC | Lyre | V-trellis | Signif. |
| No. shoot/vine | 27.3 | 34.8 | 46.3 | 45.3 | 46.8 | 49.7 | 0.0001 |
| No. shoot/m canopy | 14.0 | 9.1 | 12.0 | 11.8 | 12.3 | 13.2 | 0.0001 |
| Shoot length (cm) | 130 | 142 | 102 | 120 | 103 | 136 | 0.0001 |
| No. node/shoot | 24.0 | 25.5 | 20.2 | 23.8 | 21.3 | 25.2 | 0.0001 |
| Internode length (cm) | 5.3 | 5.5 | 5.0 | 5.1 | 4.9 | 5.3 | 0.0002 |
| Primary leaf area/shoot (cm2) | 2280 | 2470 | 1790 | 2120 | 1810 | 2380 | 0.0001 |
| Lateral leaf area/shoot (cm2) | 1050 | 1190 | 610 | 900 | 600 | 950 | 0.0003 |
| Lateral leaf area (%) | 28.5 | 30.5 | 24.5 | 28.7 | 23.9 | 17.0 | 0.003 |
| Total leaf area/vine (m2) | 8.4 | 11.6 | 10.7 | 13.2 | 11.0 | 15.8 | 0.0001 |
| Total leaf area/m canopy (m2) | 4.72 | 3.20 | 2.90 | 3.52 | 2.98 | 4.51 | 0.0001 |
| Leaf area/g fruit (cm2/g) | 14.4 | 15.9 | 11.9 | 13.1 | 11.2 | 15.5 | 0.002 |
| Pruning wt (kg/vine) | 1.58 | 2.04 | 1.74 | 1.99 | 1.73 | 2.51 | 0.002 |
| Pruning wt/m canopy (kg/m) | 0.89 | 0.59 | 0.50 | 0.54 | 0.48 | 0.72 | 0.005 |
| Crop yield (mt/ha) | 9.9 | 12.8 | 15.3 | 15.9 | 16.8 | 18.6 | 0.0001 |
| Yield: pruning weight ratio | 4.9 | 4.9 | 6.4 | 7.0 | 7.4 | 5.8 | 0.0001 |
| Shoot weight (g) | 64 | 64 | 40 | 44 | 38 | 53 | 0.003 |