Comparison of grape harvesting and sorting methods on factors affecting the must quality
This study compared two harvesting techniques (manual and mechanical) and three grape sorting methods (no sorting, manual, and densimetric) in attempts to obtain high-quality must. The trials were carried out in 2009 and 2010 in Tuscany, Italy. The effectiveness of the harvest-sorting chain was asse...
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doaj-f38e5bd28d0046129a159a8ac3f1f6ed2020-11-25T03:19:04ZengPAGEPress PublicationsJournal of Agricultural Engineering1974-70712239-62682015-04-01461192210.4081/jae.2015.456390Comparison of grape harvesting and sorting methods on factors affecting the must qualityAlessandro Parenti0Paolo Spugnoli1Piernicola Masella2Lorenzo Guerrini3Stefano Benedettelli4Stefano Di Blasi5Department of Agricultural, Food and Forestry Systems, University of FirenzeDepartment of Agricultural, Food and Forestry Systems, University of FirenzeDepartment of Agricultural, Food and Forestry Systems, University of FirenzeDepartment of Agricultural, Food and Forestry Systems, University of FirenzeDepartment of Plant, Soil and Environmental Science, University of FirenzeConsorzio Tuscania s.r.l., FirenzeThis study compared two harvesting techniques (manual and mechanical) and three grape sorting methods (no sorting, manual, and densimetric) in attempts to obtain high-quality must. The trials were carried out in 2009 and 2010 in Tuscany, Italy. The effectiveness of the harvest-sorting chain was assessed on two parameters. Substandard berries (SSB) is the percentage of berries, which do not meet quality standards that enter the winemaking process, and material other than grape (MOG) is a measure of the cleanliness of the berries entering the process. In the two years the trial was run the grape maturation level was widely different; in 2009 the vintage was more far mature than in 2010. With respect to SSB content and harvesting methods, in 2009 (more mature grapes) hand-picking reduced SSB content, while in 2010 there were no differences between the two harvesting methods. In both years, densimetric sorting reduced SSB content, while there were no significant differences between no sorting and manual sorting. In terms of MOG content, both harvesting and sorting results were inconsistent. In 2009, MOG was lower in mechanically harvested grapes; while in 2010 it was lower in hand-picked grapes. As for sorting methods, in 2009 there were no differences in MOG, while in 2010 mechanical sorting produced better results. Our results question whether the post-harvest sorting techniques used by many estates are effective; particularly as the question has received little attention and no previous research has compared methods. Secondly, our study contributes to the debate on the effects of harvesting technique on wine quality.http://www.agroengineering.org/index.php/jae/article/view/456Wine grapes, material other than grapes, sub-standard berries, density sorting, hand sorting, mechanical grape harvest |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Alessandro Parenti Paolo Spugnoli Piernicola Masella Lorenzo Guerrini Stefano Benedettelli Stefano Di Blasi |
spellingShingle |
Alessandro Parenti Paolo Spugnoli Piernicola Masella Lorenzo Guerrini Stefano Benedettelli Stefano Di Blasi Comparison of grape harvesting and sorting methods on factors affecting the must quality Journal of Agricultural Engineering Wine grapes, material other than grapes, sub-standard berries, density sorting, hand sorting, mechanical grape harvest |
author_facet |
Alessandro Parenti Paolo Spugnoli Piernicola Masella Lorenzo Guerrini Stefano Benedettelli Stefano Di Blasi |
author_sort |
Alessandro Parenti |
title |
Comparison of grape harvesting and sorting methods on factors affecting the must quality |
title_short |
Comparison of grape harvesting and sorting methods on factors affecting the must quality |
title_full |
Comparison of grape harvesting and sorting methods on factors affecting the must quality |
title_fullStr |
Comparison of grape harvesting and sorting methods on factors affecting the must quality |
title_full_unstemmed |
Comparison of grape harvesting and sorting methods on factors affecting the must quality |
title_sort |
comparison of grape harvesting and sorting methods on factors affecting the must quality |
publisher |
PAGEPress Publications |
series |
Journal of Agricultural Engineering |
issn |
1974-7071 2239-6268 |
publishDate |
2015-04-01 |
description |
This study compared two harvesting techniques (manual and mechanical) and three grape sorting methods (no sorting, manual, and densimetric) in attempts to obtain high-quality must. The trials were carried out in 2009 and 2010 in Tuscany, Italy. The effectiveness of the harvest-sorting chain was assessed on two parameters. Substandard berries (SSB) is the percentage of berries, which do not meet quality standards that enter the winemaking process, and material other than grape (MOG) is a measure of the cleanliness of the berries entering the process. In the two years the trial was run the grape maturation level was widely different; in 2009 the vintage was more far mature than in 2010. With respect to SSB content and harvesting methods, in 2009 (more mature grapes) hand-picking reduced SSB content, while in 2010 there were no differences between the two harvesting methods. In both years, densimetric sorting reduced SSB content, while there were no significant differences between no sorting and manual sorting. In terms of MOG content, both harvesting and sorting results were inconsistent. In 2009, MOG was lower in mechanically harvested grapes; while in 2010 it was lower in hand-picked grapes. As for sorting methods, in 2009 there were no differences in MOG, while in 2010 mechanical sorting produced better results. Our results question whether the post-harvest sorting techniques used by many estates are effective; particularly as the question has received little attention and no previous research has compared methods. Secondly, our study contributes to the debate on the effects of harvesting technique on wine quality. |
topic |
Wine grapes, material other than grapes, sub-standard berries, density sorting, hand sorting, mechanical grape harvest |
url |
http://www.agroengineering.org/index.php/jae/article/view/456 |
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