Published in Scientific Papers. Series A. Agronomy, Vol. LXVIII, Issue 2
Written by Andrew SVYDENKO
The study highlights the results of research into the phases of growth and development of the Moldavian dragonhead (Dracocephalum moldavica) depending on the timing of sowing and moisture conditions. The research was conducted in the agro-ecological conditions of the Central Forest-Steppe of Ukraine. The emergence of seedlings was noted on the 6th - 7th day, depending on the time of sowing. After 20 days from the beginning of the appearance of seedlings, the tillering phase was noted in plants of the first sowing period, and in the case of the second sowing period, after 28 days. In the phase of mass flowering, the height of plants reached 90-95 cm with indicators of above-ground mass of 200-240 g per plant. The mass fraction of essential oil in experiments in the phase of mass flowering varied from 0.08% to 0.16%. The yield of essential oil was the highest during the first sowing period with moderate moisture. Based on the results of the obtained values, a model of economically valuable indicators of the Moldavian dragonhead was built.
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