Cluster Thinning Effects on Yield and Cluster Characteristics in Sloping Vineyard
2022
Korkutal, Ilknur | Bahar, Elman | Koskosoglu, Batuhan
This study was carried out in the vineyard (40°39'12.00" N and 27°03'20.00" E) located within the Tekirdağ province Şarköy district in the vegetation periods of 2019-2020 and 2020-2021. 13-year-old Cabernet Franc vines grafted onto Fercal and 140 Ru rootstocks were used. Vines planted at 2.1 m × 1.0 m spacing, height of trunk is 70 cm, in the form of a single-arm Cordon Royat trellising and in N-S direction. The altitude of the vineyard is between the highest 327 m and the lowest 309 m. In this study; the effects of two rootstock (Fercal and 140 Ru), three location (located on the slope: “top”, “middle” and “bottom”), three cluster thinning applications (0%, 25% and 50%) on cluster characteristics were determined. In the conditions of Sarkoy county of Tekirdag province, low values were obtained from the Fercal rootstock in terms of cluster characteristics, except for the number of berry per cluster. In terms of the location on the slope, the “top” location gave a high value in terms of the number of berry in the cluster, while it had a decreasing effect in all other criteria. Therefore, when Cabernet Franc/Fercal combination, low cluster width, cluster length, cluster weight, cluster volume and cluster density are desired in sloping vineyards, it has been found that the “top” location in slope can be preferred and it is recommended not to do the cluster thinning in order to avoid lower yield.
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