Influence of growth regulators on the development and branching degree of najdared apple trees in the nursery

Abstract

The experimental plot is placed in fruit-growing nurseries of "Vindex Agro" Ltd. during the 2022 year. The object of the research was the apple trees Najdared variety, grafted on M 9 rootstock. Planting of rootstocks was carried out in the spring of 2021. The grafting method used in the field of nursery trees was Chip beading grafting. Planting distance was 80x35 cm. In order to intensify the formation of the anticipated shoots in the area of the crown formation, various technological processes were used: 1. Free eyelid growth (control); 2. Progerbalin LG, 25 ml; 3. Progerbalin LG, 25 + 25 ml; 4. Progerbalin LG, 25 ml + topping of apical leaves; 5. Progerbalin LG, 25 + 25 ml + topping of apical leaves; 6. Progerbalin LG, 30 ml + topping of apical leaves; 7. Gerba 4 LG, 25 ml; 8. Gerba 4 LG, 25 + 25 ml; 9. Gerba 4 LG, 25 ml + topping of apical leaves; 10. Gerba 4 LG, 25 + 25 ml + topping of apical leaves; 11. Gerba 4 LG, 30 ml + topping of apical leaves. It has been established that the most reasonable garnishing of the crown formation with anticipated shoots at Najdared variety was obtained by topping the apex area once when the graft reaches 65-70 cm height combined with twice sprays with different growth regulators. The first treatment was done after topping the apical leaves and the next at 5-7 days late.