Terroir 2016 banner
IVES 9 IVES Conference Series 9 Introducing heterogeneity measurements in terroir studies. Application in the região demarcada do douro (n portugal)

Introducing heterogeneity measurements in terroir studies. Application in the região demarcada do douro (n portugal)

Abstract

Terroir zoning studies have to manage the heterogeneity and complexity of the landscape properties and processes. The varying geology is one of the main landscape properties conditioning the spatial variability of terroirs. An entropy-based index used to characterize the heterogeneity of soil particle size distribution has been recently recognized to be controlled by the lithological properties at landscape scale. This index, known as the Balanced Entropy Index (BEI), which has been identified as a very good predictor of soil water content, is a promising tool in geosciences because it provides a continuous parameterization of soil texture that enables establishing quantitative relationships between soil texture and all the hydropedological attributes related to it.

In this study, carried out in the Portuguese winegrowing region called Região Demarcada do Douro (RD Douro), we explored the BEI in the lithostratigraphic units, and its potential relationship with the vineyard distribution and characteristics at plot scale. The data set for this work was the soil map of RD Douro scale 1/25 000, the vineyard distribution, and the information of the soil map database, which includes analytical and morphological data of 1 217 soil profiles.

Results evidenced that, in areas with similar lithological properties, vineyard plant density is linearly related with the soil texture heterogeneity, being this relationship stronger in metamorphic lithologies than in granitic lithologies. In light of this and other remarkable results we concluded that the BEI is a useful new tool that might have multiple applications in terroir studies.

Download the PDF

DOI:

Publication date: June 23, 2020

Issue: Terroir 2016

Type: Article

Authors

Joaquín CÁMARA, Alberto LÁZARO, Vicente GÓMEZ-MIGUEL

Departamento de Producción Agraria, Universidad Politécnica de Madrid, 28040 Madrid, Avda. Puerta de Hierro, 2, Spain

Contact the author

Keywords

soil texture heterogeneity, Balanced Entropy Index, plant density, fractals, RD Douro

Tags

IVES Conference Series | Terroir 2016

Citation

Related articles…

OENOLOGICAL TANNINS FOR PREVENTING THE LIGHT-STRUCK TASTE IN WHITE AND ROSÉ WINES

The light exposure of wine can be detrimental as a relevant loss of aromas takes place [1] and light-induced reactions can occur. The latter involves riboflavin (RF), a photosensitive compound, that is fully reduced by acquiring two electrons. When the electron-donor is methionine, the light-struck taste (LST) can appear leading to cooked cabbage, onion and garlic odours-like [2]. The use of oenological tannins can limit the appearance of LST in both model wine [3] and white wine [4]. This research aimed to evaluate the impact of certain oenological tannins, selected in a previous study as the most effective against LST [5], in both white and rosé wines.

Read More

Grapevine bud fertility under elevated carbon dioxide

Aims: Microscopic bud dissection is a common tool used to assess grapevine bud fertility and therefore to predict the yield of the following season

Read More

Digital PCR: a tool for the early detection of brettanomyces in wine

Brettanomyces bruxellensis is found in various ecological niches, but particularly in fermentative processes: beer, kombucha, cider and wine. In the oenological sector, this yeast is undesirable, as it can produce ethyl phenols, thus altering wine quality. These compounds are characterized by stable or horse-sweat aromas, unpleasant for consumers.

Read More

Response of the plant: a chief element for the characterisation of wine-growing “terroirs”

Face au risque de banalisation des produits agroalimentaires, un intérêt toujours plus marqué se développe en faveur des produits du terroir.

Read More

Characterization of four Chenin Blanc-rootstock combinations to assess grapevine adaptability to water constraint

Climate change impacts water availability for agriculture, notably in semi-arid regions like South Africa, necessitating research on cultivar and rootstock adaptability to water constraints. To evaluate the performance (vegetative and reproductive) of different Chenin Blanc-rootstock combinations to the two water regimes, a field experiment was established in a model vineyard at Stellenbosch University, South Africa. Chenin Blanc vines grafted onto four different rootstocks (110Richter, 99Richter, 1103Paulsen and US 8-7) were planted in 2020. The vines are managed under two contrasting water conditions – dryland and irrigated (industry norm).

Read More