Statistical assessment of the degree of influence of Chasselas 41В rootstock on some technological characteristics of Misket rusenski and Super ran Bolgar table vine cultivars (Vitis vinifera L.)

摘要

The choice of rootstock is important not only for the power that it induces to the grafted, but with respect to its influence on mineral nutrition, content of sugars, total acids, percentage ratio of the components in fruit, etc. The study included two dessert vine varieties -Misket rusenski and Super ran Bolgar, grafted on two different rootstocks -Berlandieri x Riparia, selection Oppenheim 4, better known as S04 (it is accepted for control in the researches) and Chasselas x Berlandieri 41 В (hereinafter for short Chasselas 41B. Both varieties were grown at the experimental vineyards of IASS "Obraztsov chiflik" -Rousse, as during the vegetation, the values of 12 technological characteristics were registered. Data obtained were statistically analyzed using the evaluation criteria F - Fisher and t - Student.The results showed different levels of significance of the individual characteristics of both varieties when Chasselas 41В rootstock was used, compared to the control. In cv. Super ran Bolgar, Chasselas 41В rootstock influenced quite positively on thecharacteristics: % seeds and % skin of berry mass, number of seeds in 100 berries and mass of 100 berries, in statistical analysis conducted by the criteria of Student. At the same complex of characteristics for Misket rusenski variety, but using F criterion of Fisher, significant negative differences compared to the control were reported. Only for the characteristics "mass of 100 seeds", the positive difference compared to the control was significant, on the significance level: a=0,001. From the statistical analysis conducted by Fisher's criteria, 33% of the studied technological characteristics were registered for Misket rusenski variety and 17% - for Super ran Bolgar variety, with significant differences in favor of Chasselas 41В rootstock, compared to the control. By the criterion of Student, the significant differences as percentage of all the characteristics studied were 25% for Misket rusenski variety and 42 % for Super ran Bolgar, respectively.In less than the half of the technological characteristics for both dessert vine varieties, high degrees of variability were identified, which was probably due to a strong dependence of those characteristics on the environmental factors.