ECONOMIC EFFICIENCY OF CULTIVATION OF APPLE TREES ON DIFFERENT TYPES OF CLONAL ROOTSTOCKS IN THE CONDITIONS OF THE MIDDLE VOLGA REGION
Low-growing fruit trees on weak-growing clonal rootstocks are best suited to the requirements of intensive gardening. Vegetatively produced clonal rootstocks of apple created by V.I. Budagovsky, S.N. Stepanov, A. Veytenberg, O.K. Dyadchenko, P.K. Shuvalov allowed to grow trees with early appearance of fruit, with the limited dimensions and high productivity in Central Russia, the Volga region and the Urals. The experiment was done on middle-growth dwarf trees and high-growth trees the conditions of the Middle Volga, in Samara. The most productive trees were grown on middle-growth rootstock. Harvest exceeded by 51.8% of the trees on the high-growth rootstock and by 17.3% on dwarfs ones. The cost price on middle-growth rootstock was 8.9 rubles, on dwarf 12.0 rubles, in control 10.1 rubles. The highest profitability of 27.3% was in the option for middle-growth rootstocks, which is 2.5 times higher than in the control sample. In conditions of insufficient moisture in the Middle Volga most profitable crops were on middle-growth rootstock 57-233.