Research regarding the influence of the nutrition space on the Echinacea purpurea (L) Moench. species yield and quality under the central of Moldova conditions.

Echinacea purpurea (L.) Moench. is a perennial species, originating in North America from which the aerial parts are used in therapeutic purposes, and at the plants from the fourth year may be used also the roots. The extracts and the pharmaceutical forms with extracts are used in urology, gynecology and internal medicine. The echinacea herba is the raw material for the production of antiviral, anti - tumor, immunostimulant. Under the influence of the research factors interaction the highest average yield over the three years (73.38 q/ha) was obtained at the variant sown at a distance of 50 cm between rows and 15 cm between plants per row. The highest content in active principles, respectively polyphenolic compounds, polyphenolic acids and flavonoids was determined at the plants from the same variant that achieved the greatest production of dry herba.