Influence of Pruning Levels on the Yield of Grape Cultivar "Salty" (Vitis vinifera) under rainfed conditions

Abstract

This research was conducted in one of grapevine fields in Sweida province during two seasons 2016-2017, to determine the exact number of remaining nodes on the shoot to get optimal yield, in the lack of farmers knowledge to determine the nodes load in vine grapes and the absence of mixed pruning application (spur and shoot). 36 vines were pruned according to three replicates and four levels of pruning (4-6-8) nodes / shoot in addition to the control, which is the pruning of the farmer in which he usually does without leaving a replacement spurs (leaving 10 shoots/vine with a different length 4-5-6 nodes/shoot). Four nodes / shoot treatment significantly revealed the highest of fruitfulness percentage and fertility index (53.54% and 95.28, respectively), While the treatment of eight nodes / shoot significantly gave the highest percentage of burst buds (58.33%). In addition, the treatment of four nodes / shoot significantly revealed the highest number of clusters per vine, cluster weight, yield (kg/vine), Pruning wood (kg/plant), which were (37.67, 394.4g, 12.56kg, and2.94kg respectively). While the two treatments of pruning (four and six nodes / shoot) were significantly higher than other treatments in terms of Ravaz index (4.26 and 4.56 respectively).