VEGETATIVE REPRODUCTION OF CHRYSANTHEMUM × KOREANUM MAKAI IN THE CONDITIONS OF THE ESIC OF THE SUMY NAU

Abstract

The article presents the results of studies of vegetative reproduction of several varieties of small-flowered chrysanthemums, promising for landscaping in the conditions of the northeast of Ukraine, on the base of educational and scientific industrial combine of Sumy national agrarian university. The hormonal stimulators effect of root formation on the rooting process and development of Chrysanthemum × koreanum Makai was studied. It is established that rooting processes on cuttings of chrysanthemum of Korean variety in conditions of closed ground pass quite actively both with the use of phytohormones, and without them. But in variants with phytohormone heteroauxin, the most developed root system is formed on the cuttings, as indicated by the results of morphometric studies. Execution of work foresees the following tasks: to determine the influence of vegetative reproduction variants on the percentage of rooting and formation of the root system of plants; determine the dynamics of growth processes and changes in morphological parameters in plants of different varieties according to the experimental variants. For vegetative reproduction, selected varieties of state registration were recommended for cultivation in the forest-steppe natural zone. Reproduction was carried out according to the developed methods according to the variants of the experiment: cuttings without heel, without stimulators of root formation (control); heel-free cuttings that have undergone phytohormonal stimulation; cuttings with heel, without the use of phytohormones. Cutting - the most convenient and effective way of vegetative reproduction, which gives a large number of high-quality homogeneous planting material. Studies have shown that in all variants under the conditions of regular irrigation and stable temperature regime in the range of 15-18°С, the percentage of rooted cuttings without stimulation of phytohormonum was 98%, with the use of phytohormones - 100%. In general, the root system of cuttings that were rooted with the use of phytohormones, was the best developed, in them the total length of the roots of the order of order was 2 times greater than that of plants without stimulation. On the basis of conducted observations it turned out that the process of branching and the formation of lateral shoots is influenced by varietal features and almost does not affect phytohormone stimulation