The significance of yield production and sugar content of the grapejuice with macronutrients in grape rootstock-scion combinations on dry climatic condition
2002
A field experiment was set up at Cserszegtomaj, in western part of Hungary in 2000. The age of the vines was 8 years, the vineyard lays on Eutric cambisol soil. The mean annual temperature and rainfall of the area are 10.4 degrees C and 650 mm. The experiment was randomized block design, with four repetitions and 10-10 stocks per rootstock variety. The rootstocks used in the trial were Berlandieri x Riparia T. 5C (5C), Berlandieri x Riparia T. K. 5BB (5BB), 140 Ruggeri (140 Ru), Fercal, Berlandieri x Riparia T. 8B GK10 (8BGK10), Georgikon 28 (G28). As scions, Vinitor, Hungarian Riesling and Italian Riesling were grafted on the six rootstocks. Leaf samples for analysis were collected at veraison period from above the cluster. N, P, K and their ratios were determined. Yield and sugar content of the juice were determined at harvest. The level of N and P differed according to the rootstock varieties in two scion combinations. Polynomial correlation was determined between potassium and sugar contents under dry condition. Statistically significant differences occurred by rootstock-scion combinations at sugar production also. The mineral uptake of the Hungarian Riesling, which has higher vigor growing habit, was less effected by rootstocks than the other two scions.
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