Influenţa regulatorilor de creștere asupra obținerii producțiilor înalte în plantațiile de cireș din soiul Kordia altoite pe portaltoiul MaxMa 14

Abstract

The experiment was carried out in the orchard “Agroparc Management” Ltd. established in 2015. The study subject of the experiment was Kordia cherry variety, grafted on MaxMa 14. The trees were trained according to the spindle system and the fruit tree spacing of 5.0×3.0 m. The research was conducted during the year 2021. In order to study the effect of the growth regulators Auxiger LG (1-naphthylacetamide (1-NAD - 1.5 g/l), 1-naphthylacetic acid (1-NAA - 0.6 g/l)) and Gibbera, SL (gibberellins, 10 g/l mixture of GA4+7) on the fruit setting rate, the development processes of cherry trees and the fruit yield the following variants of treatment were experimented: 1. Control – without treatment; 2. Auxiger LG, 0.7 l/ha; 3. Gibbera, SL, 0.25 l/ha; 4. Gibbera, SL, 0.5 l/ha. The growth regulator Auxiger LG was sprayed once, during the period of intensive fruit growing, when the fruits diameter was 12–13 mm (14.05.2021), while Gibbera, SL was applied in three phases. The first treatment was done at the end of the flowering phase (26.04.2021), and the subsequent two treatments – at an interval of 7-10 days, on 05.05.2021 and on 14.05.2021, respectively. During the analyzed period, it was established that a higher fruit setting rate, a better development of trees, higher fruit yields and a more balanced economic efficiency of cherry production were recorded when using the growth regulator Gibbera, SL at a dose of 0.5 l/ha