Effect of rootstock-scion interaction on petiole nutrient content, bud break, and yield of three commercial grape cultivars

Abstract

An experiment was conducted to study the influence different rootstocks (1103 P, SO4 and Dog ridge) on petiole nutrient content (%), bud break (days) and fruit yield (kg ha−1) of commercial grape varieties (Thompson Seedless, Flame Seedless and Kishmish Chorni). The study revealed that there was often rootstock, scion and rootstock x scion interaction effect on mineral nutrient content, yield components and yield. In general, across scion cultivars higher petiole N content was recorded with Dogridge rootstock at full bloom, while the pronounced effect on increasing petiole K content was recorded with Dogridge at bud differentiation stage. Considerable effect in increasing phosphorus (P) content was recorded with 1103 P which was comparable to own rooted vines during both the stages. Across rootstocks, Thompson Seedless cultivar recorded higher nitrogen (N) and P and Kishmish Chorni recorded higher potassium (K) content. Early bud break was observed with 1103P and own rooted vines among rootstocks and with Kishmish Chorni among cultivars. Yield per vine was higher in Thompson Seedless on own root which was on par with Kishmish Chorni on Dogridge which recorded comparable yields with 1103 P and own rooted vines. Irrespective of the scion varieties, higher bunch weight was recorded on Dogridge.