Published in Scientific Papers. Series B, Horticulture, Vol. LXVII, Issue 1
Written by Milena YORDANOVA, Nikolay FILIPOV
Plant biostimulants that have a good effect on the growth and development of plants, especially when they are under the influence of stress factors. The purpose of the experiment was to study the effect of seaweed extract Kelpak® on the development of cucumbers, greenhouse production, under different forms of treatment. The experiment was carried out in the unheated glass greenhouse in the Sandanski region - a city in Southwestern Bulgaria with an altitude of 296 m, in 2019, with April planting. Biostimulant Kelpak was applied in two directions: 1) for soaking seeds and roots and 2) treatment during the growing season. 6 variants in four replicates were developed: 1) control nontreated plants – (NT); 2) treated seeds (TS); 3) treated seedling roots (TSR); 4) only vegetation treatment (VT); 5) treated seeds + vegetation treatment (TS+VT); 6) treated seedling roots + vegetation treatment (TSR+VT). Visible differences in plant growth occur after the first vegetation treatment. The variant with only treated seeds (TS) had the highest number of leaves (23rd day after transplanting), the highest number of fruits at the first harvest and the longest stem length.
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