The effect of the graperootstock-scion interaction on the potassium and calcium content of the leaves in connection with yield production

An experiment was set up to determine the most important effect of the grap erootstock-scion interaction in vineyard on the experimental plot of the Un iversity at the West edge of Lake Balaton. Three scion varieties were graft ed on six rootstocks resulting in 18 combinations of graftings. All the dev elopment each of the graftings was examined and surveyed separately. Based on leaf analysis results we can gain data about the interaction of rootstoc k and scion varieties concerning mineral nutrition of the grafts, its diffe rences and characteristics. In the present study we give account of leaves originated from vines grown same soil type and nutrient condition. Statisti cally significant differences were found in the yield production and Ca con centration of scion leaf blades according to the rootstocks as well accordi ng to the scions also. After the first yield production year the difference s in K and Ca contents of the leaves were greater by the scion varieties th an the rootstocks. The highest Ca concentrations were determined at the sci on leaves with combination of Georgikon 28 {(V. berlandieri x V. riparia T. K. 5BB) x V. vinifera} rootstock. The differences in Ca concentrations wer e higher according to the scion varieties. It shows not only the rootstocks or the scions influences the nutrient supply of the vines, but the combina tions of these two components is very important from this point of view.