The effect of root pruning applications on yield and quality of some table grape varieties of different ages grown in different solid culture media

In this study, the effects of root pruning on two and three year old Yalova İncisi and Prima grape cultivars grown in Cocopeat and Perlite:Peat (2:1) solid culture media were investigated. Modified Hoagland nutrient solution was applied to plants grown in 32 liter pots and under bird nets once a week intervals. The amount of water given to the plants varied from 1 to 3 liter for per day, according to the development periods of plants. As a result of the study, Yalova İncisi was more affected from root pruning practices than the Prima variety. Depending on the increase in plant age, Yalova İncisi had lost some yield, but the application effects were not significant in the Prima variety. Cocopeat for Yalova İncisi and Perlite:Peat medium for Prima were more suitable. Root pruning decreased grape yield of Yalova İncisi, depending on the size of the clusters. This effect was less in Prima. On the other hand, the values obtained are included in the standard quality values given for table grapes. Considering macro elements, N was in excess and K was in deficiency limit values in both cultivars. Their micro element contents were found to be sufficient.