Abstract
AbstrAct: Plant variables and must physicochemical properties were evaluated for the grapevine ‘Syrah’ cultivated in sequential growing seasons (summer and winter) from 2011 to 2015. The vines were trellised in vertical shoot position, grafted on Paulsen 1103, with approximate density of 5,800 plantsha −1 ∙. They were grown under plastic overhead cover. The experimental design was completely randomized, and the following variables were measured at the harvest: number of branches, number of clusters, cluster weight and yield, Agrometeorology - Article Plant parameters and must composition of ‘Syrah’ grapevine cultivated under sequential summer and winter growing seasons Mario Jose Pedro Junior 1 *, Jose Luiz Hernandes 2 , Ludmila Bardin-Camparotto, Gabriel Constantino Blain 1. Instituto Agronomico - Centro de Ecofisiologia e Biofisica - Campinas (SP), Brazil.2. Instituto Agronomico - Centro de Frutas - Jundiai (SP), Brazil. *Corresponding author: mpedro@iac.sp.gov.brReceived: Apr. 28, 2016 – Accepted: Sept.5, 2016
Highlights
Viticulture in São Paulo State (Brazil) is based on the production of rustic table grapes as well as on the production of grapes for juice or wine
The highest values of yield, cluster weight, and titratable acidity were observed during the summer growing season, while the highest values of soluble solids content and pH were observed during winter
These results suggest that the grapes harvested during the winter show physicochemical characteristics more suitable than those observed during the summer crops for winemaking purposes
Summary
Viticulture in São Paulo State (Brazil) is based on the production of rustic table grapes as well as on the production of grapes for juice or wine. Rural tourism has increased the demand for high-quality wines obtained from fine wine grapes In this view, the ‘Syrah’ grapevine has been used because of its adaptability to warm regions (Orlando et al 2008). It is known that the rainy season in southeastern Brazil (November to March) may negatively affect grape quality because of its influence on the phenological stages of cluster development, maturation, and harvest (Regina et al 2011). This feature is relevant for growers who produce fine wines (Regina et al 2011)
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