The influence of growth regulators on the stimulation development, fruit setting and productivity of Kordia cherry variety

Abstract

Growth regulators play an important role in regulating the process of plant growth and development and are increasingly used successfully in fruit growing. The aim of the research was to establish the effect of growth regulator, on setting of ovaries in the crown, enhancing growth and morphogenetic processes, increasing yields and maintaining physiological balance in crown of trees. The experimental plot is placed in the orchard “Agroparc Management” Ltd. founded in 2015. The study subject of the experience was Kordia cherry variety grafted on MaxMa 14. The trees were trained as vogel central leader systems. The distance of plantation is 5.0 x 3.0 m. The tested product was Auxiger LG and Gibbera, SL. The active ingredient of Auxiger it is 1-naphthylacetamide (1-NAD – 1.5 g/l) and 1-naphthylacedic acid (1-NAA– 0.6 g/l), but for Gibbera, SL product was gibberellic acid (GA4+7) To study the influence of the treatment on fruit setting ovaries and fructification of Kordia variety, four variants were experimented: 1. Control – no treatment; 2. Auxiger LG – 0,7 l/ha; 3. Gibbera, SL – 0.25 l/ha; 4. Gibbera, SL – 0.50 l/ha. We demonstrated that Gibbera, SL product may be included in the technologic system to stimulate fruit formation, productivity and maintaining physiological balance in crown of trees to administered in the dose 0.5 l/ha, up to 3 times, starting from petal fall stage and continuing intervals of 7-10 days.