Improving the honeysuckle propagation by lignified cuttings technology

The aim of research is to study the effect of the growth stimulator "Kornevin" and the mineral fertilizer "Fertika" on the rooting rate and morphophysiological parameters of lignified honeysuckle cuttings. Research objectives: to assess rooting rate of cuttings; determine the morphometric parameters of the aboveground part and root system; to study the physiological and biochemical parameters of the leaves. The study was carried out on the ecosystem dendrological territory of the Siberian Botanical Garden of Tomsk State University in 2018-2019. Research objects were the varieties: Barkhat, Roxana and Parabelskaya. The paper studied the influence of the growth stimulator "Kornevin" and the complex mineral fertilizer "Fertika" on rooting, development of the aerial part and root system of lignified honeysuckle cuttings, physiological and biochemical parameters of leaves. The study considered the effect of the separate application of the stimulant and fertilizer and their combined effect. A high rooting rate in the control was revealed in varieties Barkhat (82.3 %), low in varieties Roxana (52.8 %) and Parabelskaya (34.3 %). The positive effect of the complex use of "Kornevin" and "Fertika" has been noted. In the experimental variants, the rooting rate of cuttings increased by 1.0-9.1 %; plant height - by 3.3-26.7; root length - by 8.4-30.7 % compared to the control. In the leaves of cuttings, an increase in the amount of chlorophylls was observed in the experimental variants by 4.7-27.2 %. The nitrogen balance index (NBI) of the Roksana and Parabelskaya varieties increased by 5.8-19.2 % in comparison with the control. To improve the technology of reproduction of honeysuckle by lignified cuttings and to obtain high-quality planting material, it is necessary to use the growth stimulator "Kornevin" and the mineral fertilizer "Fertika".