The Influence of AKM Growth Regulator on Photosynthetic Activity of Oilseed Flax Plants in the Conditions of Insufficient Humidification of the Southern Steppe of Ukraine

EN: Zone of South Steppe of Ukraine is distinguished by unstable weather conditions. The experiments were conducted on the sorts of oilseed flax Evryka and Orfei. The optimal concentrations of plant growth regulator AКM are defined for preplanting treatment of oilseed flax seeds. Influence of AКM on photosynthetic activity of the investigated plants was analyzed. It was defined that the increase of pigments concentration in the leaves of experiment plants of all sorts is related to strengthening of leaf area growth and higher intensity of photosynthesis. Correlation dependence between pigments content and index of the net productivity of photosynthesis (NPP), force of which depended both on a sort and influence of AКM, was calculated. So, for the control variant of sort Evryka there was registered a strong correlation connection between chlorophyll content and NPP (r = +0.76), for the sort Orfei—between the chlorophyll index and NPP (r = +0.84). Thus, the increase of the photosynthesis productivity with participation of AКM for the plants of oilseed flax took place due to the increase of assimilative area of leaves and amount of green pigments