Vine-shoot waste aqueous extract applied as foliar fertilizer

摘要

The aim of this work was to study the influence of foliar applications of different wood aqueous extractson the amino acid content of musts and wines from Airén variety; and to study their relationship with thevolatile compounds formed during alcoholic fermentation. For this purpose, the foliar treatments proposedwere a vine-shoot aqueous extract applied in one and two times, and an oak extract which wasonly applied once. Results obtained show the potential of Airén vine-shoot waste aqueous extracts tobe used as foliar fertilizer, enhancing the wine amino acid content especially when they were appliedonce. Similar results were observed with the aqueous oak extract. Regarding wine fermentative volatilecompounds, there is a close relationship between musts and their wines amino acid content allowing usto discuss about the role of proline during the alcoholic fermentation and the generation of certainvolatiles.