Uman NUH | today: 04/15/2024
| Author(s) |
Tkachenko O. B., Doctor of Technical Sciences, , Pashkovskiy O. I., , , Tarasova V. V., , , |
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|---|---|---|---|
| Category | The Agronomy | ||
| year | 2019 | issue | Issue number 94. Part 1 |
| pages | 134-147 | index UDK | 634.836:631.542:547.56 | DOI | 10.31395/2415-8240-2019-94-1-134-147 (Link) |
| Abstract | In recent decades, Ukrainian grape assortment has been replenished with new technical varieties of breeding NSC «IV&V n. a. V. Ye. Tairov». However, the existing viticultural technology does not allow to fully realize their technological potential. Thus, the study of varietal viticulture practices, taking into account grape quality indicators, is relevant. The purpose of this work was to investigate the influence of vine training system on phenolic complex of grape varieties Aromatnyi and Zagrey. To achieve this goal, following tasks were set: 1) to study the accumulation of phenolic substances; 2) to study the activity of the oxidase system (MPMO) of grapes. Experimental design included four training systems: 1) bilateral horizontal cordon on 80 cmheight trunk/vertical shoot positioning (control); 2) bilateral horizontal cordon on 40 cmheight trunk/vertical shoot positioning; 3) bilateral horizontal cordon on 120 cmheight trunk/nonpositioned shoots; 4) monolateral horizontal cordon on 160 cmheight trunk/nonpositioned shoots. Vine planting density for Aromatnyi variety was 3x1,5 m and for Zagrey 3x1, 3x1,5 m. After harvest, technological reserve, mass concentration of phenolic substances in must, proportion of polymeric forms in the total amount of substances, absolute and relative activity of the oxidative system (MPMO) of grapes were determined individually for each variant. . Significant influence of vine training system on the accumulation of phenolic substances in berries was determined. Increasing the concentration of phenolic substances, as well as the proportion of their polymeric forms in Aromatnyi grapes, was recorded for 40 cmheight and 120 cmheight training systems. The same was recorded for Zagrey variety for 40 cmheight training system. Significant effect of studied viticulture practice was also revealed in relation to the activity of the oxidase system of grapes. The lowest absolute and relative activity of MPMO and, accordingly, the potential of grape phenol complex to oxidation, was noted for samples of Aromatnyi variety, obtained from 40 cmheight and 120 cmheight vines. For Zagrey variety, the lowest relative activity and potential for oxidation of phenolic substances were noted for samples of grapes, obtained from 40 cmheight vines. | ||
| Key words | training system, Aromatnyi, Zagrey, quality, phenol complex, oxidase activity | ||