Conference Proceedings

Impacts of sustained deficit irrigation on quality attributes and flavonoid composition of Shiraz grapes and wine

YM Chalmers, MP Krstic, MO Downey, BR Loveys, PR Dry

Acta Horticulturae | Published : 2008

Abstract

Deficit irrigation of grapevines can influence canopy structure, berry size and composition, but how these changes impact on wine quality is not well understood. In 2004, field trials were established in North West Victoria, Australia to explore the impact of sustained deficit irrigation on Vitis vinifera L. and the subsequent effects on quality attributes and flavonoid composition of the grapes and wine. The trials were conducted on Shiraz grafted to 140 Ruggeri (V. berlandieri × V. rupestris) rootstock. The vines were drip irrigated providing 100% of estimated Etc (control) and three graded sustained water deficits being 65%, 45% and 34% of the control. Assessments of grape composition wer..

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