Influence of yield levels on the quality of grapes and wines from the variety Carminoir cultivated in Ticino | Influence du rendement sur la qualite des raisins et des vins de Carminoir cultive au Tessin
2007
Spring, J.-L. | Ferretti, M., Station de recherche Agroscope Changins-Waedenswil ACW, Nyon (Switzerland)
A study on yield restriction was carried out on the new red wine Carminoir vine plant on the experimental estate at Gudo (Ticino, Switzerland) of the ACW Agroscope Changins-Wädenswil Research Station. A normal yield level, corresponding to a leaf-fruit ratio situated between 1.0 and 1.2 m2 of exposed leaf surface area per kg of grapes, was compared with a heavily restricted variant (50% of normal yield). The heavily restricted variant produced slightly sweeter and less acidic musts and wines richer in polyphenols, and with a deeper colour. Yield levels had no influence on vine strength and no notable differences were detected in the sensorial analysis of wines. Overall, the small qualitative differences measured in the present study did not justify very low yields, characterised by leaf-fruit ratios well higher than the value of 1.0 to 1.2 m2 of exposed leaf surface area per kg of grapes.
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