Postbudburst Spur Pruning Reduces Yield and Delays Fruit Sugar Accumulation in Sangiovese in Central Italy

Tommaso Frioni, Sergio Tombesi, Matteo Gatti, Stefano Poni, Alberto Palliotti, Oriana Silvestroni, Vania Lanari, Andrea Bellincontro, Paolo Sabbatini

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

30 Citazioni (Scopus)

Abstract

The influence of pruning date on yield control and ripening rate of spur-pruned Sangiovese grapevines was investigated over two years (2013 and 2014). Winter pruning was applied on 1 or 4 Feb (mid dormancy); 1 or 5 March (late dormancy); 2 or 7 April (bud swell); 2 or 7 May (flowers closely pressed together); and 1 or 6 June (40 to 50% of flower caps fallen), respectively. Vine yield and fruit composition at harvest were not affected by shift­ing from the standard pruning dates of mid and late dormancy to the bud swell stage. In contrast, the number of inflorescences in compound buds was significantly reduced for vines pruned in early May. No inflorescences were retained on vines pruned at the beginning of June. Early May pruning reduced fruit set and berry weight and slowed fruit ripening compared to the other pruning dates. At harvest, must soluble solids and titratable acidity were 1.6 Brix lower and 1.8 g/L higher, respectively, for the May treatment compared to the standard pruning dates. The early May pruning dates also achieved higher total anthocyanins and phenolic concentrations than the standard pruning dates, indicating that this technique can potentially decouple the accumulation dynamics of these components. Further studies are needed to better calibrate winter pruning date for managing yield and berry maturation rate. © 2016 by the American Society for Enology and Viticulture.
Lingua originaleEnglish
pagine (da-a)419-425
Numero di pagine7
RivistaAmerican Journal of Enology and Viticulture
DOI
Stato di pubblicazionePubblicato - 2016

Keywords

  • berry composition
  • bud fertility
  • leaf area
  • reserve storage
  • winter pruning
  • yield

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