Effects of silicon amendments on grapevine, soil and wine

Paul Schabl, Christoph Gabler, Erhard Kührer and Walter Wenzel
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Paul Schabl: Instituteof Soil Science, University of Natural Resources and Life Sciences, Tulln an der Donau, Austria
Christoph Gabler: Division of Viticulture, School of Viticulture and Pomology, Krems, Austria
Erhard Kührer: Division of Viticulture, School of Viticulture and Pomology, Krems, Austria
Walter Wenzel: Instituteof Soil Science, University of Natural Resources and Life Sciences, Tulln an der Donau, Austria

Plant, Soil and Environment, 2020, vol. 66, issue 8, 403-414

Abstract: Replacing Bordeaux broth and synthetic fungicides by less invasive approaches of fungal disease control remains a challenge for both conventional and organic viticulture. Silicon (Si) application has been proposed as a viable alternative for the control of pathogens and other stresses in agriculture. In a three-year field trial, we tested the effect of foliar and soil application of colloidal silicon on its availability in vineyard soil and pants, the performance and quality of yield, and finally, the control of powdery mildew for grapevine cv. Grüner Veltliner. Soil application of colloidal silicon increased plant-available Si, but only foliar application increased the total silicon concentrations in leaves, yield, and cluster weight. Moreover, the wine produced from the silica-treated grapes were ranked better in sensory evaluations. Our findings provide evidence for the potential of at least partially replacing conventional fungicides, rendering viticulture more sustainable in terms of soil protection and biodiversity. Silicon applications are low in costs and comply with the principles of organic wine production.

Keywords: Vitis vinifera; colloidal silicon; plant nutrition; biostimulant; wine quality (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:66:y:2020:i:8:id:40-2020-pse

DOI: 10.17221/40/2020-PSE

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