The most important facts from research and practice
funded by the Federal Ministry for Education and Research
Extract on page 20:
It is no longer a secret that new grape varieties, the PIWIs, can be used to produce high-quality wines. This could also be shown in the framework of the novisys project for wines from the minimal cut in the trellis. The level of yield, the state of health of the grapes and the correct time of harvest are decisive for the quality and type of wine. Excessive yields and harvesting too early in particular quickly lead to unripe, thin and bitter wines with minimal pruning in the trellis, which are associated with low color in red wines. For this reason, a targeted reduction in yield (BBCH scale: 75) in the first few years of the conversion is strongly recommended. In addition, the smaller berries in the minimal cut in the trellis lead to an increased proportion of berry skin and thus to a higher berry skin / pulp ratio.
Wines from the minimal cut in the trellis benefit from this. With a moderate yield level and harvest time adapted to the ripeness, aromatic, fragrant and slim white wines as well as tannin-rich and color-intensive red wines can be produced in the new cultivation system.
Novisys research project Project leader: Prof. Dr. Reinhard Töpfer
Julius Kühn Institute
Federal Research Institute for Cultivated Plants (JKI) Institute for Vine Breeding Geilweilerhof Geilweilerhof