Abstract:

The ripening of grapes consists of some complex physico-chemical and bio-chemical processes. These processes; climate, soil, geographical location, variety, rootstock and cultural practices, in short, affect all terroir components. As these conceptions are effective alone, they are also in constant interaction with each other. In this research, terroir-grapevine-grape berry relations were examined. Trial is located in Sarkoy/Tekirdag, Chateau Kalpak Vineyards for two years 2019/2020 and 2020/2021. In the vineyard with a slope of 18%, an altitude of 309-327 m, and a height of trunk 70 cm in which Cabernet Franc/Fercal and Cabernet Franc/140Ru grafting combinations are used, between rows is 2.1 m and the width on rows is 1.0 m. The vines planted in the N-S direction were cultivated in the single-arm Cordon Royat trellising system. The aim of the study is to determine how three different cluster thinning (0%, 25% and 50%) applied to grapevines which is grafted on two different rootstocks (140Ru and Fercal) considering their positions on the slope (Top, Middle and Bottom) affect the grape berry characteristics. As a result, low values were obtained from Fercal rootstock in terms of berry fresh and dry weight, berry volume, berry density and berry skin area. On the other hand, berry width, berry length, % dry weight and berry skin area / berry volume from 140Ru rootstock, too. When the location on the slope is examined; the Top position reduced the criteria other than berry density and berry skin area / berry volume. Since the average yield of two years in the vineyard is between 700-800 kg da-1, it was determined that it would be more appropriate no cluster thinning (0% S).

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