Leigh M. Schmidtke, Susan E. P. Bastian, Keren Bindon, Marcos Bonada, Paul K. Boss, Robert G. V. Bramley, Lukas Danner, Paul R. Petrie, Lira Souza Gonzaga, Cassandra Collins
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In this investigation, an empirical study of grape and wine composition, including sensory evaluations, was used to inform the delineation of subregional areas of the Barossa Zone geographical indicator (GI).</p>\n <p><b>Methods and Results:</b> A spatiotemporal investigation of Shiraz was undertaken with vineyard zones selected to exemplify maximum heterogeneity within a site. Objective measures of vine performance and grape and wine composition were clustered using the <i>k</i>-means approach, and up to three clusters of vineyard sites were evident within the dataset. Clusters were associated with vineyard elevation and thus growing temperatures. The most important measures of composition defining each cluster were the volatiles ethyl octanoate, diethyl succinate, 1,8-cineole and 3-methyl butyl acetate in grapes. Sensory attribute intensity differences were apparent for wines from some subregions, and projection of the important attributes for clusters defined in this study to key sensory differences shows a high variance in composition related to sensory features from year to year. The spatial outcomes of clusters for vineyard sites align with of some outcomes of prior clustering approaches using data-rich sources for precision agriculture.</p>\n <p><b>Conclusions:</b> Subregional zones within the Barossa can be identified where sufficient variations between vineyard elevations exist that impart grape compositional differences, which in turn translate into wine sensory attributes.</p>\n <p><b>Significance of the Study:</b> This empirical study provides some evidence for regionality within the Barossa with up to three subregions identified in some vintages.</p>\n </div>","PeriodicalId":8582,"journal":{"name":"Australian Journal of Grape and Wine Research","volume":"2024 1","pages":""},"PeriodicalIF":2.5000,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/ajgw/2622516","citationCount":"0","resultStr":"{\"title\":\"Exploring Interactions Between Vineyard Performance, Grape and Wine Composition and Subregional Boundaries—The Terroir of Barossa Shiraz\",\"authors\":\"Leigh M. 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Exploring Interactions Between Vineyard Performance, Grape and Wine Composition and Subregional Boundaries—The Terroir of Barossa Shiraz
Background and Aims: Viticulturists and winemakers have a considerable interest in understanding the influence of climate, soil, viticultural and winemaking practices on wine sensory outcomes—that is, understanding the terroir concept, which is important for regionality and claims of product distinctiveness. In this investigation, an empirical study of grape and wine composition, including sensory evaluations, was used to inform the delineation of subregional areas of the Barossa Zone geographical indicator (GI).
Methods and Results: A spatiotemporal investigation of Shiraz was undertaken with vineyard zones selected to exemplify maximum heterogeneity within a site. Objective measures of vine performance and grape and wine composition were clustered using the k-means approach, and up to three clusters of vineyard sites were evident within the dataset. Clusters were associated with vineyard elevation and thus growing temperatures. The most important measures of composition defining each cluster were the volatiles ethyl octanoate, diethyl succinate, 1,8-cineole and 3-methyl butyl acetate in grapes. Sensory attribute intensity differences were apparent for wines from some subregions, and projection of the important attributes for clusters defined in this study to key sensory differences shows a high variance in composition related to sensory features from year to year. The spatial outcomes of clusters for vineyard sites align with of some outcomes of prior clustering approaches using data-rich sources for precision agriculture.
Conclusions: Subregional zones within the Barossa can be identified where sufficient variations between vineyard elevations exist that impart grape compositional differences, which in turn translate into wine sensory attributes.
Significance of the Study: This empirical study provides some evidence for regionality within the Barossa with up to three subregions identified in some vintages.
期刊介绍：
The Australian Journal of Grape and Wine Research provides a forum for the exchange of information about new and significant research in viticulture, oenology and related fields, and aims to promote these disciplines throughout the world. The Journal publishes results from original research in all areas of viticulture and oenology. This includes issues relating to wine, table and drying grape production; grapevine and rootstock biology, genetics, diseases and improvement; viticultural practices; juice and wine production technologies; vine and wine microbiology; quality effects of processing, packaging and inputs; wine chemistry; sensory science and consumer preferences; and environmental impacts of grape and wine production. Research related to other fermented or distilled beverages may also be considered. In addition to full-length research papers and review articles, short research or technical papers presenting new and highly topical information derived from a complete study (i.e. not preliminary data) may also be published. Special features and supplementary issues comprising the proceedings of workshops and conferences will appear periodically.
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