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Effect of cluster and berry thinning on Merlot and Cabernet Sauvignon wines composition

Author

Listed:
  • Marko KAROGLAN

    (Department of Viticulture and Enology, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia)

  • Mirela OSREČAK

    (Department of Viticulture and Enology, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia)

  • Luna MASLOV

    (Department of Viticulture and Enology, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia)

  • Bernard KOZINA

    (Department of Viticulture and Enology, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia)

Abstract

The manipulation of grape yield is widely practised to improve grape and wine quality. Merlot and Cabernet Sauvignon vines in the Zagreb vineyard hills, north-western Croatia, were subjected to three crop removal treatments [cluster thinning (CT), berry thinning (BT), CT+BT, and untreated control] in a randomised block design experiment. CT and CT+BT treatments reduced the grape yield but increased the mean cluster weight compared to control vines. BT alone had a little effect on the yield components. Control grapes generally had the lowest soluble solids (°Oe) and highest titratable acidity (g/l). In most cases, control wines had the lowest total phenols, flavan-3-ols, and anthocyanin concentrations, while CT+BT treatment had the highest ones followed by CT treatment. It was concluded that CT+BT produced wines with generally increased total phenols, flavan-3-ols, and anthocyanins, as well as many individual phenolic compounds. Thus, grape yield per vine seems to be strongly connected with the grape and wine compositions. The final cost-effectiveness of this canopy interventions still remains questionable.

Suggested Citation

  • Marko KAROGLAN & Mirela OSREČAK & Luna MASLOV & Bernard KOZINA, 2014. "Effect of cluster and berry thinning on Merlot and Cabernet Sauvignon wines composition," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 32(5), pages 470-476.
    • Handle: RePEc:caa:jnlcjf:v:32:y:2014:i:5:id:598-2013-cjfs
    DOI: 10.17221/598/2013-CJFS
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