Terroir 2008 banner
IVES 9 IVES Conference Series 9 Using ΔC13 to assess viticultural and oenological suitability for Sangiovese of different pedoclimatic conditions in Chianti

Using ΔC13 to assess viticultural and oenological suitability for Sangiovese of different pedoclimatic conditions in Chianti

Abstract

A two years trial was carried out in Chianti (Central Italy) to assess at the detailed scale the viticultural and oenological suitability for Sangiovese of different pedoclimatic conditions, by means of the ΔC13 measured in the must sugars. Six plots placed in two specialised vineyards in similar geomorphological conditions were investigated. The plots differed for morphological position: summit, backslope and footslope. The soils of the vineyards were similar, except for structure, porosity and related hydropedological characteristics. Soil water content and temperature were measured at different depths. Measurements were replicated every one/two weeks. Soil characterization included macroporosity quantification by image analysis.
The yield, phenological phases, and chemical analysis of grapes were determined. The isotopic ratio 13C/12C was measured in the must sugar upon harvesting. Grapes of each plot were collected for wine making in small barrels. The wines obtained were analysed and submitted to a blind organoleptic testing.
The results demonstrated that almost all plots had rather high amounts of transpirable water, even during the driest time of the year; however, the response of Sangiovese was influenced by site hydropedology. The soils in morphological positions receiving and holding more water produced significant worst results in the moister 2005, than during the drier 2006. The drier soils yielded the best results in both years, but more prominently in 2005. Vines of the plots having a lower soil water availability produced relatively higher values of ΔC13, as well as a better oenological and organoleptic result. The ΔC13 test confirmed the limited stress conditions in the two vineyards, despite yields in the two years ranged from 2 to 8 kg per plant. This result highlighted the pedoclimatic limitations of the studied sites in obtaining high quality wine.

DOI:

Publication date: December 8, 2021

Issue: Terroir 2008

Type: Article

Authors

Edoardo A.C. COSTANTINI (1), Sergio PELLEGRINI (1), Pierluigi BUCELLI (1), Paolo STORCHI (2), Nadia VIGNOZZI (1), Roberto BARBETTI (1), Stefano CAMPAGNOLO (1)

(1) CRA – Research centre for Agrobiology and Pedology, Florence, Italy
(2) CRA – Research unit for Viticulture, Arezzo, Italy

Contact the author

Keywords

carbon isotopes, hydropedology, porosity, land evaluation, terroir

Tags

IVES Conference Series | Terroir 2008

Citation

Related articles…

Identification of the agronomical and landscape potentialities in Côtes du Rhône area (France)

[lwp_divi_breadcrumbs home_text="IVES" use_before_icon="on" before_icon="||divi||400" module_id="publication-ariane" _builder_version="4.19.4" _module_preset="default" module_text_align="center" module_font_size="16px" text_orientation="center"...

Assessment of wine non-Saccharomyces yeast strains as promising producers of glutathione

AIM: Glutathione (GSH) is a non-protein thiol naturally present in grape berries and produced by yeasts during fermentation. It has a strong antioxidant activity, thus can be added during winemaking to limit the oxidative phenomena of wine, preserving sensory characteristics and stability, ultimately promoting a healthier product by reducing the need for SO2 addition.

Unravelling the mystery of drought tolerance confered by rootstocks

Climate change will increase the frequency of water deficit experienced in certain european regions, due to increased evapotranspiration and reduced rainfall during the growing cycle. We therefore need to find ways of adaption, including the use of more drought-tolerant planting material. In addition to the varieties used as grafts and involved in the wine ypicity of our wines, rootstocks selection is a relevant way of adapting to more restrictive environmental conditions.

Immunotestπ: a new test for the determination of proteic stability in white and rosé wines

Proteic haze is a problem which may occur in all fruit-based beverages and fermented juices (beer, cider, wine). When it occurs, the economic loss is important.

Protected Designation of Origin (D.P.O.) Valdepeñas: classification and map of soils

The objective of the work described here is the elaboration of a map of the different types of vineyard soils that to guide the famers in the choice of the most productive vine rootstocks and varieties. 90 vineyard soils profiles were analysed in the entire territory of the Origen Denominations of Valdepeñas. The sampling was carried out in 2018 (June to October) by making a sampling grid, followed by photointerpretation and control in the field. The studied soils can be grouped into 9 different soil types (according to FAO 2006 classification): Leptosols, Regosols, Fluvisols, Gleysols, Cambisols, Calcisols, Luvisols and Anthrosols. A map showing the soil distribution with different type of soils has been made with the ArcGIS program. Regarding to the choice of rootstock, Calcisoles are soils with a high active limestone content, so the rootstocks used in these soils must be resistant to this parameter; Luvisols are deep soils with high clay content, so they will support vigorous rootstocks. Because the cartographic units are composed of two or more subgroups, with are associated in variable proportions, 9 different soil associations have been established; Unit 1: Leptosols, Cambisols and Luvisols (80%, 15% and 5% respectively); Unit 2: Cambisols with Regosols and Luvisols (40%, 30% and 30% respectively); Unit 3: Cambisols and Gleysols with Regosols (40%, 40% and 20% respectively); Unit 4: Regosols with Cambisols, Leptosols and Calcisols (40%, 30%, 15% and 15% respectively); Unit 5: Cambisols, Leptosols, Calcisols and Regosols (25% each of them); Unit 6: Luvisols with Cambisol and Calcisols (80%, 10% and 10% respectively); Unit 7: Luvisols and Calcisols with Cambisols (40%, 40% and 20% respectively); Unit 8: Calcisols with, Cambisols and Luvisols (80%, 10% and 10% respectively); Unit 9: Anthrosols. These study allow to elaborate the first map of vineyard soils of this Protected Designation of Origin in Castilla-La Mancha.