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SOIL-GRAPEVINE INTERACTIONS: INSIGHT FROM VERDICCHIO IN THE MARCHE WINE REGION, ITALY

2017; Geological Society of America; Linguagem: Inglês

10.1130/abs/2017am-301497

0016-7592

Megan L. Barlow, B. I. Cameron, Erik L. Gulbranson, Erica B. Young,

Wine Industry and Tourism

Verdicchio is a white grape varietal notably grown in the Marche wine region of eastcentral Italy within two Denominazione Origine Controllata (DOCs); Castelli di Jesi and Matelica, located less than 50 km apart.Jesi lies in the Apennine foothills near the coast of the Adriatic Sea and produces a smooth wine noted with apple-pear undertones and crisp, clean acidity.Conversely, Matelica is located in a synclinal valley of a fold-and-thrust belt and produces stronger wine with penetrating floral aromas and bold acidity.While macro-climatic variations do exist between DOCs, this research focuses on geological variations, specifically variations in soil composition, and understanding how geology could affect the grapevine nutrient supply contributing to the distinct wine flavor characteristics noted between DOCs.In order to quantify variations in both soil and plants between DOCs, several soil and plant analyses were conducted.This study focused upon soil samples collected within eight vineyards, with a total of ten soil profiles, and ten grapevine stem samples collected next to each soil profile.Soil samples were analyzed for soil texture, pH, organic matter, mineralogy, elemental and oxide concentrations, plant available nutrients, base saturation, cation exchange capacity, macronutrient element concentrations (N, C, and P), and N isotopes ( 15 N).Grapevine stem samples were also analyzed for macronutrient elements (N, C, and P) and N isotope composition ( 15 N).The isotopic N ratios of grapevine stems and soil were used in a model to 