Published in Scientific Papers. Series B, Horticulture, Vol. LXVIV, Issue 2
Written by Marian ION, Liliana PÎRCĂLABU, Cristian BURLACU
The rootstock exerts an important influence on the quality of the grapes, affecting the level of production through the vigor given to the vinifera variety. The research was carried out between 2020 and 2024, in a plantation with the Fetească neagră variety grafted on rootstocks: 125AA, 2C, RG, 71C, SO4-4, 5BB, 140 Ru, 57D, 26C. Compared to the average (2020-2023), grape production in 2024 decreased by +1.117 kg/vine in the case of SO4-4 rootstock and by 0.464 kg/vine in the RG rootstock. The multiple comparison between rootstocks indicates that the 57D, 71C and 2C rootstocks achieved statistically assured positive production differences compared to the 125AA, 26C and RG rootstocks. Due to the accentuated hydric deficit and a high heliothermic regime characteristic of 2024, the concentration of the sugars varied between 262.9 g/l tartric acid at rootstock 57 D and 241.7 in the case of rootstocks 2C, RG, 26 C and SO4-4, to the detriment of the total acidity with variations between 3.9 g/l tartaric acid (57 D) and 5.7 g/l tartaric acid (125 AA and 2 C).
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