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Rotwein unter Hochspannung: Mehrjährige Qualitäts- Untersuchung mit Gas-Discharge-Visualisation (GDV)

Bigler, C.; Levite, D.; van der Meer, M.; Kaufmann, A. and Weibel, Dr. F. (2009) Rotwein unter Hochspannung: Mehrjährige Qualitäts- Untersuchung mit Gas-Discharge-Visualisation (GDV). Paper at: 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.

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Summary

We investigated whether we can detect any differences in red wines produced either
by bio-dynamic or by standard organic agriculture. We used standard methods to
investigate the quality of the wines and Gas-Discharge-Visualisation (GDV) method to
investigate a holistic quality of the wines. With the GDV-method, samples are exposed
to high voltage. The halo-like gas discharge caused by a burst of electron emission of
the sample is captured by a digital camera underneath a transparent, dielectric surface.
The wine samples measured originate from an On-Farm experiment in South of
France with two separately managed but neighbouring blocks (same soil and climate
conditions): bio-organic and bio-dynamic. Apart from the use of bio-dynamic preparations,
plant protection and fertilization was the same in both blocks. The vinification of
the sampled grapes was made in two replicates which were analysed separately.
During the three years of examination, the bio-dynamic samples did not reveal significant
differences when assessed with standard methods (sensory triangle test, polyphenol
analysis etc.). However, with GDV measurements the values for the imageparameter
“mean intensity” were mostly higher for the wines from bio-dynamically
produced grapes. In a „mixed effect model“ (GDV-parameter „mean intensity“ as
dependent variable, replication und cultivation-system as fix and year as random
effect) the difference was statistically significant. We conclude that the GDV-method
has an interesting potential to detect very sensitively differences in food attributes.
However, in order to interpret the results in terms of consumer-relevant quality further
research is needed.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Subjects: Food systems > Food security, food quality and human health
Research affiliation: International Conferences > 2009: Scientific Conference on Organic Agriculture > Lebensmittel > Lebensmittelqualität
Related Links:http://www.wissenschaftstagung.de/, http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37
Deposited By: Bigler, Christoph
ID Code:14446
Deposited On:14 Apr 2009
Last Modified:12 Apr 2010 07:38
Document Language:German - Deutsch
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Dieser Beitrag ist im Tagungsband der 10. Wissenschaftagung erschienen:
Mayer, J.; Alföldi, T.; Leiber, F.; Dubois, D.; Fried, P.; Heckendorn, F.; Hillmann, E.; Klocke, P.; Lüscher, A.; Riedel, S.; Stolze, M.; Strasser, F.; van der Heijden, M. and Willer, H., (Hrsg.) (2009) Werte – Wege – Wirkungen: Biolandbau im Spannungsfeld zwischen Ernährungssicherung, Markt und Klimawandel. Beiträge zur 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.
Band 1: Boden, Pflanzenbau, Agrartechnik, Umwelt- und Naturschutz, Biolandbau international, Wissensmanagement
Band 2: Tierhaltung, Agrarpolitik und Betriebswirtschaft, Märkte und Lebensmittel.
Verlag Dr. Köster, Berlin.
Der Tagungsband kann beim Verlag Dr. Köster bezogen werden; siehe http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37

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