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The effect of the new growth stimulator with the cytokinin nature Ivin was investigated at the parameters of growth, blooming and chlorophylls content of the leaves of  Ca  llistephus chinensis  (L.) Ness. plants. The researched plants grow under the impact of industrial and exhaust fumes. The intensification of the growth processes of the treatment plants in comparison with untreated was established. The processed specimens enhance height, the number of side shoots, quantity of the leaves and their area as well as the area of the total assimilation plants surface with increasing of the vegetative mass of the plants accordingly. At the same time, the number of inflorescences and their average diameter increase. There was no significant difference in essential influence of the biostimulator upon the plants of  Callistephus chinensis  between breeds ‘Victoria Sharlachovaya’ and ‘Strausovo pero Rubinivaya’ with the exception of some variables (total assimilation surface). The content of chlorophyll in leaves of  Callistephus chinensis  plants increases under spraying by  Ivin . The rising occurs originally after spraying seedlings due to chlorophyll, after the third treatment (flower-bud formation) – due to both forms of chlorophylls was established, as well as the breed specific reaction of plants was determined. The novelty of this work consists in the investigation of the influencing the growth stimulator on the development of the ornamental flower plants in the conditions of environmental pollution. The treatment of this preparation is appropriate for stimulation of growth and intensity of bloom of the ornamental flower plants of urban territories.

international letters of natural sciences

Effect of Treatment of &lt;i&gt;Callistephus chinensis &lt;/i&gt;( L.) Ness. Plants by Ivin at Growth and Decorative Parameters in Conditions of Industrial City