28. Mathematical phenologycal assesment of red wine vine varieties

The application of 2 mathematical methods for phenological assessment of a big group of red wine vine varieties was studied. It was determined that this approach allows the disclosure of characteristic features connected with the phenophases duration and their specific dynamics during the vegetation period. The red wine vine varieties grown in Bulgaria form four phenotypic groups. This research allows the completion of the phenological characteristic in their ampelographic description. The obtained information can be used for practical purposes and in scientific research.