УДК 631.53.04: [631.524.84: 633.8]
Authors:
Mikhail Karpukhin - candidate of agricultural sciences, Vice-rector for research and innovation, Ural state agrarian University. 620075, Russian Federation, Yekaterinburg, Karla Libkhneta str., 42. E-mail:
S. Lyakhova - master's student of the Ural State Agrarian University. 620075, Russian Federation, Yekaterinburg, Karla Libkhneta str., 42.
Abstract. The study on the topic: "The structural composition of aboveground biomass of Lofant Tibet depending on the timing of sowing seeds in the open ground" was conducted at the collection site of medicinal plants of the Ural State Agrarian University (Ur GAU), located in the Beloyarsk district, Sverdlovsk region. The aim of the study is to study the effect of different sowing periods on the structural composition of aboveground biomass of Tibetan lofant, in which the main active substance is essential oil. In the lofant biomass, it is found mainly in the leaves and inflorescences (approximately in the same amount) and a very small amount is noted in the stems. Therefore, the more leaves and inflorescences in the structure of aboveground biomass, the higher the quality of medicinal raw materials. In the course of the study, it was found that the time of sowing seeds of Tibetan lofant in the open ground has a noticeable effect on the structure of the aboveground biomass of Tibetan lofant. The best results, both by weight (6 t/ha) and by percentage (26.9 %) of inflorescences in aboveground biomass, were provided by the first option - at an early seed sowing date (May 1). The lowest rates were observed in the third variant, where inflorescences were formed by 3.0 t / ha (50.0 %) less than in the control variant. As for the content of stems and shoots in the structure of the crop, their participation is approximately the same. their share ranges from 41.6 % (third option) to 43.7 % (first option).
Keywords: Lofant Tibetan, sowing, the structure of above-ground biomass/
