Influence of growth regulators on the rooting of european cranberry (Vaccinium oxycoccos L.)

The aim of the study is to research the effect of treatment with growth stimulants on the rooting of ligni-fied cuttings of marsh cranberry grown in Moscow. The studies of European cranberry plants (Vaccinium oxycoccos L.) were conducted in 2023–2024 at the Edelstein Scientific and Practical Center of Horticulture and Vegetable Growing (Timiryazev Russian State Agrarian University). The objects of the study were promising varieties of European cranberry bred in Russia (Dar Kostromy, Fomich). The experimental de-sign provided for the use of 4 types of growth stimulants for each variety of European cranberry: Kornevin (10 mg / cutting); heteroauxin (200 mg/l); indolebutyric acid (100 mg/l); succinic acid (250 mg/l). The con-trol was plant cuttings without treatment with stimulants. The processes of harvesting cuttings, treatment with solutions of growth stimulants, planting cuttings for rooting were carried out according to generally accepted methods of cutting garden crops. The rooting period of the cuttings of the European cranberry varieties in the experiment averaged 28 days. The rooting of the Fomich European cranberry cuttings in all variants of the experiment exceeded the Dar Kostromy variety in this indicator. In the variant with the use of Kornevin, all the studied cranberry varieties showed the highest percentage of rooting of the cuttings (Dar Kostromy variety – 96.0 %, Fomich – 98.5 %). The largest rhizogenic zone was observed in plants in the variant of the experiment with Kornevin (Dar Kostromy variety – 120.7 cm, Fomich – 125.5 cm). The drug Kornevin showed high efficiency in rooting and further development of the adventitious root sys-tem of marsh cranberry varieties of Russian selection (the rooting of plants increased by 1.5 times com-pared to the control).