ЭЛЕМЕНТЫ АГРОТЕХНИКИ ЗВЕРОБОЯ ПРОДЫРЯВЛЕННОГО (HYPERICUM PERFORATUM) В УСЛОВИЯХ СВЕТОКУЛЬТУРЫ

Abstract

This paper discusses the productivity evaluation results (shoot length, shoot number, leaf size, and yields) of hy-droponically grown perforate St. John’s wort (Hypericum perforatum L.). Hydroponic technique enables year-round growing of this medicinal plant preserving natural plant population in the Khanty-Mansiysk Autonomous District -Yugra; perforate St. John’s wortis listed in the District’s Red Book as the species that should be closely monitored in its natural habitat. A vertical ebb-and-flow hydroponic unit was used for growing. The research target was the Optimist variety of perforate St. John’s wort. Generally ac-cepted research methods were applied. Phytopathological evaluation of the perforate St. John’s wort plantation re-vealed low level of infestation with fusarium disease (less than 5%). The experiment showed that the plants reached the best values of all growth indices when grown under white lights of luminous flux of 8000 lm, color temperature of 4000 K, and РРF of 165 μmol s m2. Moreover, lighting with white LEDs stimulates transition of growing plants to flowering stage on the 97th day after planting and increas-es yield to 3.12 kg m2. The variety Optimist variety of perfo-rate St. John’s wort in hydroponic environment forms creeping, aggressively branching shoots that should be considered during growing.