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International Journal of Innovative Approaches in Agricultural Research 2025, Vol 9(4) 388-402

Study of the Technological Characteristics of the White Wine Varieties Tamyanka, Slava and Druzhba, Grown in the Kyustendil Region (Bulgaria)

Tatyana Yoncheva • Simeon Krumov
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Article Type
Research article
Publication Date
December 17, 2025
Pages
388-402
DOI
10.29329/ijiaar.2025.1375.9

Abstract

The study of the technological characteristics of the white varieties Tamyanka, Slava and Druzhba in the Kyustendil region was carried out during four consecutive harvests (2021 – 2024). The climatic factors in the growing region were monitored annually for the period of the study. The grapes were harvested upon reaching optimal maturity for each variety. It was found that the sugar content in the grapes depended on the varietal specifics and the weather conditions of the year. The variety with the best sugar accumulation and the earliest grape harvest was Tamyanka. The lowest sugars and titratable acidity were found in the Druzhba variety. The classical scheme for the production of white dry wines was applied for processing and vinification of the grapes. The obtained experimental wines had a chemical composition without deviations from the normal ranges of the studied indicators. The alcohol concentration was in line with the sugar accumulation in the grapes per variety and harvest. The Tamyanka samples had the highest extract content and titratable acidity. The quantity of phenolic compounds in the wines of the studied varieties was similar. Their sensory characteristics corresponded to the varietal features. In the organoleptic analysis, the samples with the highest tasting ratings were the Tamyanka variety, followed by Slava, and the lowest rated were those of the Druzhba variety.

Keywords: Tamyanka Slava Druzhba Grapes Wine Chemical Composition Sensory Characteristics
Cite this article
Yoncheva, T. & Krumov, S. (2025). Study of the Technological Characteristics of the White Wine Varieties Tamyanka, Slava and Druzhba, Grown in the Kyustendil Region (Bulgaria). International Journal of Innovative Approaches in Agricultural Research, 9(4), 388-402. https://doi.org/10.29329/ijiaar.2025.1375.9

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