Composition of grape grown on different Homogenous Terroir Units (HTU)

Abstract

This paper was based on the soil maps units from Ribera de Duero viticulture and wine Denomination of Origin that defined different Homogeneous “Terroir” Units (HTU) with potentially diverse oenological qualities. The main aim of this study was the study of possible correlations between HTU categories and the development and quality of the wine grapes cultivated on specified HTUs. Five vineyards from three different optimum HTUs were selected for this study. Selection criteria were grape variety, clone, rootstocks, age, training systems and cultural practices, trying to select the most similar vineyards.
Samples of 25Kg were manually harvested, from each one of the 15 selected vineyards. The grapes were harvest at the degree of technological maturity as similar as it was possible. Technological maturity is correlated with adequate levels of sugar, acidity and phenolic content, so that good sanitary stages and even good levels of aroma precursor compounds. So, composition of grapes was evaluated considering all these parameters, however this paper showed only partial results, showing levels of sugar, acidity variables (pH, titrable or total acidity and content of malic acid), and phenolic compounds (several phenolic families were considered: total polyphenols, anthocyanins, catechin and flavanol levels). This work will be completed with future studies that will be carried out in future vintages.
Obtained data showed that, even having a large variance among vineyards of the studied Homogeneous Terroir Units, was possible to detect significant differences on the composition and oenological quality of the grapes of each UHT.

 

DOI:

Publication date: December 8, 2021

Issue: Terroir 2008

Type : Article

Authors

M.L. GONZALEZ-SANJOSE (1), M.D. RIVERO (1), M. BLEOJU (1) and V. GOMEZ-MIGUEL (2)

(1) Department of Biotechnology and Food Science. University of Burgos. 09001 Burgos, Spain
(2) Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Politécnica de Madrid, Spain

Keywords

Terroir, zoning, grape quality, soil units

Tags

IVES Conference Series | Terroir 2008

Citation

Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.