Yields and raw material quality of Hypericum perforatum L. and Solidago virga-aurea L. from one-year and two-year plantations



Yields of herbs of both compared species were significantly higher in the second year (St. John's-wort by 47%, and goldenrod by 20%). The share of the most valuable parts (leaves and flowers) in the raw material was similar in the first and second year (St. John's-wort:68% and 69%, goldenrod: 73% and 68%, respectively). As far as the contents of biologically active compounds are concerned, the raw material obtained in the second year was more valuable: hypericine in St. John's-wort increased by 0.2% and leiocarposide in goldenrod by 0.15% (flavonoids were at the same level).
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