Published in Scientific Papers. Series A. Agronomy, Vol. LXV, Issue 1
Written by Svetlana MANHARТ, Vanya DELIBALTOVA
The field experiment was carried out in 2020 and 2021 crop years on alluvial-meadow soils, on the land of the village of Voivodinovo - central-south Bulgaria. The experiment was set by the method of fraction parcels in four repetitions, with size of the crop parcel - 15 m2, after a precrop - wheat. Three leaf treatment products were examined in the relevant doses: Grow Plant Gel Energy 20-8-60 + 2% MgO + amino acids and algae extract - 25 l/ha; Fulvin 40-22-80 l/ha; Isabion - 30 l/ha and were compared with an untreated control. The tested products were applied in the stage - budding of five coriander varieties: Jantar, Moroccan, Mesten drebnoploden, Thüringen and Marino. The present research work aims at examining the reaction of coriander varieties with relation to the applied leaf treatment products and their influence on the indicators productivity and seed yield. The obtained results showed that the examined leaf treatment products have a positive effect on seed yield, as well as on productivity elements of the following coriander varieties - Jantar, Moroccan, Mesten drebnoploden, Thüringen and Marino.Compared to the control, all varieties treated with Isabion preparation /30 l/ha/ registered the highest seed yield. Seed yield grew from 8.3 to 13.4 % during the crop years. The increase of seed yields after the application of Isabion - 30 l/ha was due to the higher values of the indicators number of seeds and weight of seeds per plant. The leaf treatment products applied on the coriander varieties increase the values of the indicator number of seeds from 11.3 to 18.6%, and weight of seeds from 5.1 to 21.4%, compared to the control.
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