Avaliação agronômica e enológica da cultivar Tannat e sua interação com diferentes portaenxertos e clones em vinhedo na Campanha Gaúcha - RS

Abstract

The Campanha Gaúcha region - RS has stood out in the production of grapes and fine wines, and there are technological demonstrations that Tannat cultivar can produce an emblematic wine from the region, but there were no rootstocks, nor clones of this variety in the biome under study. In view of the above, it was decided to evaluate the relationship between the interaction of rootstocks with ‘Tannat’ clones in agronomic responses and wine quality. The evaluated portagrafts were: 'SO4' (Vitis Berlandieri x Vitis Riparia), 'Gravesac' ('161-49C x' 3309C ') and' 3309C '(Vitis Riparia x Vitis Rupestris). The Tannat clones evaluated were: Californian, ‘944’, ‘717’, ‘398’ and ‘794’. For the study, a comercial vineyard planted seven years ago was used on 2015, 2016 and harvests. As dependent variables the productivity per plant, average mass of the bunches, average mass of berry, yield per hectare and yolk fertility were evaluated as well as to elaborate the wines and to evaluate them as to the physical-chemical composition, phenolic and sensorial. From this study it was observed that, in agronomic terms, the different combinations between rootstock / clone generated similar productivities, grapes with good technological maturation, less for Californian clone, and high K contents in the grapes. In the wine composition and sensory characteristics there was no difference, all treatments presented presented equivalent wines, and with high oenological potential in Campanha Gaúcha, providing wines with good sensory profile, high alcohol content, and high color and phenolic concentration.