EFFECTS OF CULTURAL PRACTICES ON THE PRODUCTIVITY OF CV DIMIAT VINES

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.

V International Symposium on Grapevine Physiology

T. Slavtcheva

grapevine (V.vinifera L.), row widths, trainings, yield, leaf area, photosynthesis, statistics

https://doi.org/10.17660/ActaHortic.2000.526.28