VEGETATIVE REPRODUCTION FEATURES OF CHRYSANTHEMUMS OF THE GARDEN GROUP MULTIFLORA

Abstract

The purpose of research is to study the influence of the substrate and plant growth stimulants on the rooting of cuttings of some varieties of chrysanthemum of the Korean garden group Multiflora (Chrysanthemum coreanum (H. Lev. & Vaniot) Nakai) multiflora). Four varieties of chrysanthemum introduced into the South Ural Botanical Garden-Institute of the Federal Research Center of the Russian Academy of Sciences (Sundeam Bronze Bicolor, Meridian Red, Ditto Dark Pink and Daybreak Apple Blossom) were used as research objects. We examined the influence of two types of substrate (sand and vermiculite) and four growth stimulants on the rooting of chrysanthemums (“Zircon”, “Lignohumate” brand AM potassium, “Beres Super” seaweed extract, “Beres AminoComplex”). It was revealed that the treatment of chrysanthemum cuttings with plant growth regulators contributed to an increase in the number (by 7–117 %) and length of roots (by 3–118 %) in the majority of the studied objects. It was noted that positive results from the use of drugs were obtained when chrysanthemum cuttings were placed in vermiculite, in contrast to options with sand as a substrate. It has been shown that the greatest effect is noticeable when cuttings are soaked in solutions of “Beres Aminocomplex” and “Beres Super” in comparison with the control variant. Varietal diffe¬rences in chrysanthemums to the effects of root formation stimulants during vegetative propagation have been revealed. Thus, in the varieties Ditto Dark Pink and Daybreak Apple Blossom, an improvement in the biometric parameters of cuttings was observed when rooted in vermiculite after exposure to plant growth regulators. It was noted that when chrysanthemum cuttings are soaked for three hours, in contrast to their wetting, the number of roots increases by 38–88 % in all variants of the experiment.