THE EFFECT OF SUBSTRATE AND PHYTOREGULATORS ON ROOT SYSTEM OF STRAWBERRY SEEDLINGS IN LOW-VOLUME PLUGS

The purpose of research was the study of vegetative organs reaction in strawberry seedling to the components of organic substrate and phytoregulation. Seedlings of 6 strawberry varietiess, organic substrate (fluffed peat, peat, sand) and growth phytoregulators (Radifarm and Atlante plus) were studied. Analysis of the results of experiments in 2019–2020 showed that the use of a substrate based on dissolved peat with perlite significantly affected the increase in root length by 15.1–27.6 % compared to the control (a mixture of peat and sand) on average for the studied varieties. The root saturation indice with plug volume of (40 cm 3 ) differed significantly compared to the control namely by 27.9–26.8 % for the studied variants. We have established the biological affectiveness of using the studied phytoregulators on root system in low volume plugs (cassettes) on all studied varieties. The root saturation did not differ in the variants with Radifarm and Atlante plus and averaged 5.2-5.4 cm/cm 3 which was significantly higher compared to the control on 28.3–46.0 %.