Terroir 1996 banner
IVES 9 IVES Conference Series 9 Characterization of vineyard sites for quality wine production. German experiences

Characterization of vineyard sites for quality wine production. German experiences

Abstract

The quality of grapevines measured by yield and must density in the northern part of Europe conditons can be characterized as a type of “cool climate” – vary strongly from year to year and from one production site to another. One hundred year observations in Johannisberg from 1890 to 1991 demonstrate for the yield formation a clear dependancy from the year combined with a steady increase in productivity; latter a proof of positive clonal selection efforts. A similar and also pronounced time series is available for the must quality: Obviously are dramatic changes between the years. They happened during low yielding periods as well as in those with higher yields. The often forwarded claim that higher yields will depress must quality cannot be confirmed despite such long term observations.
Differences in must densities measured in °Oe ranging from 30 to 50 °Oe are not unusual. An explanation for this behaviour may be changes of weather conditions during critical phenological stages of the grapvines development (2,3,5). In a time series recording the stage of full bloom for “White Riesling” from 1947 to 1991 it can be demonstrated that the earliest onset of this stage is on julian day 159 and the latest on day 191, i.e. a span of one month. A similar course can be shown for the phenological stage “begin of ripening”: it is reached earliest at julian day 222 and latest at day 261, i.e. a range of more than one month.
These influences can be categorized as “macro climatic” influences. According to them the different grape growing areas can be differenciated, because the nothern viticultural areas differ stronger in must quality from year to year in comparison to the southem growing areas. The second scaling deals with spatial and time dependant variability in a growing region. Main factors depend on topography, soil type and climate.
The influences of both categories on must quality as well as on acidity will be described subsequently.

DOI:

Publication date: March 2, 2022

Issue: Terroir 1998

Type: Article

Authors

D. HOPPMANN (1), K. SCHALLER (2)

(1) Agrarmeteorologische Beratungs- und Forschungsstelle des Deutschen Wetterdienstes, Kreuzweg 19, D-65366 Geisenheim, Deutschland
(2) Forschungsanstalt Geisenheim, Institut für Biologie, Fachgebiet Bodenkunde und Pfianzenernahrung, P.O. Box 1154, D-65358 Geisenheim, Deutschland

Tags

IVES Conference Series | Terroir 1998

Citation

Related articles…

Il piano regolatore delle citta’ del vino

Obiettivo generale di questo documenta è fornire un metodo di pianificazione che superi l’organizzazione delle aree rurali, ed in particolare vitate, finalizzata unicamente all’ot­timizzazione economico produttiva delle aziende, verso una pianificazione integrata degli spazi aperti.

Chemical and sensory diversity of regional Cabernet-Sauvignon wines

AIM: To investigate chemical and sensory drivers of regional typicity of Cabernet Sauvignon from different geographical regions of Australia.

The effects of cover cropping systems on vine physiology, berry and wine quality in a climate change scenario in Switzerland

Sustainable weed control with little detrimental effects on vine physiology, yield, berry quality, soil structure, health and biodiversity is a key factor in vineyard management. Few options are available to avoid herbicide utilization and minimize negative effects of frequent tillage on soil quality. The present project aims to investigate and develop different cover management strategies in a cool climate viticultural region in Switzerland. The impact of different treatments on vine, must and wine has been studied in an experimental vineyard in Changins, Switzerland for one year and will be continued over the next three years.

Evaluation of Furmint clones in the Tokaj Wine Region

The ’Furmint’ is the most important grape variety in the Tokaj Wine Region, constituting around 65% of its vineyard area. Before the phylloxera disease many types were grown, but as selection started in the 20th century, its diversity dramatically narrowed. As a result, the cultivation of Furmint was based mainly on two heavy-cropping clones, T.85 and T.92 at the end of the ’80s. Aims of present clone research take into account that after solely quantity as target, quality emerged in the 1990’s and most recently, typicity appeared as more private estates began their own selection program.

Impact of reduction alcohol techiniques in the aromatic chemical profile of rosé Tempranillo wines

Studying the impact of reducing alcohol techniques in the chemical composition of the aromatic profile of rosé Tempranillo wines from the spanish region of Castilla-La Mancha INTRODUCTION: In the last decades there has been an increseasing demand of wines with low or non-existing alcohol concentration due to the negative effects that alcohol has in health. In spite of that, there are not laws that protect these products, and there is also a great difficulty in the elaboration of these type of wines due to the increasing temperatures because of climate change. This is why the oenological industry has made great advances in the development of different techniques that could satisfy consumers’ demands without modifying wine quality. The most used techniques have been post-fermentative ones.