In vineyards grown in warm areas, it is usual that the stage of maturity of the grapes is fast and easily reach a high concentration of sugar and low acidity, but not an adequate phenolic maturation.
The geometry of the trellis system and the shoot density can modify the microclimate of the cluster and, therefore, the maturation process. In order to know whether, in warm areas, free or semi-free foliage systems are most appropriate to achieve a maturity more balanced than systems with guided foliage, such as the vertical shoot positioned, during 2013 and 2014 developed a test in a vineyard of Cabernet Sauvignon in Albacete (Spain).
Comparing two trellis systems – vertical shoot positioned and sprawl -, each of them with three shoot densities - 35000, 55000 and 70000 shoots per hectare-.
During maturation were determined the weight of the grape and the basic composition of the must (° Brix, pH and total acidity). Yield components and the grape phenolic components were determined at harvest.
Work presented at the Enoforum awards 2018. The paper reproduced in this video-seminar was presented at the 11th edition of Enoforum (Zaragoza, Spain, May 31 – June 1 2018)
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