NUTRIENT CONTENT OF GRAPEVINE LEAVES IN VARIOUS GRAFT COMBINATIONS

Rootstock-scion relationships are complex and this subject remains dif ficult for a researcher desiring to measure rootstock contributions to scion characteristics. The interaction of stock and scion is an impor tant factor which essentially determines the productivity and the dura bility of the vineyard. Rootstock-scion interactions were studied with focus on mineral nutrition. Pot experiments were conducted under gree nhouse conditions. Plants were grown in pots containing 2.5 kg soil. C lonal scions of Noble Italian Riesling (Vitis vinifera L.) were grafte d onto different rootstocks. Based on results of leaf nutrient analysi s, we obtained data about the interaction of rootstock varieties and s cion relating to the mineral nutrition of the grafted plants, their di fferences and other characteristics.