ISHS Acta Horticulturae 526: V International Symposium on Grapevine Physiology
EFFECTS OF CULTURAL PRACTICES ON THE PRODUCTIVITY OF CV DIMIAT VINES |
| Author: | T. Slavtcheva |
| Keywords: | grapevine (V.vinifera L.), row widths, trainings, yield, leaf area, photosynthesis, statistics |
| Abstract:
With distance in the row of 1.25 m the following row widths were tested: 1.25, 2.0, 2.5, 3.0 and 3.5 m (semi-high training, 0.8 m trunk height); 2.5 and 3.5 m (modified Moser training, 1.2 m trunk height). The loading was from 4 to 12 buds per vine. A positive correlation existed between the yield per vine and the row width (individual load). Highest yield per hectare was produced however with 2.0 m and 2.5 m - row width (semi-high training), followed by 3.5 m - row width variant (Moser training). The increase of row distance from 2.5 to 3.5 m resulted in a reduced sugar content; the elongation of the trunk had a similar effect. Relations were found also between the leaf area per vine and the row width with semi-high training. Largest leaf area per vine was at 3.0 m - row width on account of greater leaf size. However, vine leaf productivity (yield per unit leaf area) was highest in case of 2.5 m - row width, which corresponded to the photosynthetic activity. The commercial harvest depended not only on the amount of assimilates, but also on their distribution between reproductive and vegetative organs. | |
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