Yield and quality of herb in five populations of stinging nettle (Urtica dioica L.)
The aim of the present study was evaluation of the yield and quality of herb in five wild growing populations of stinging nettle. The dioecism of this plant was taken under consideration. Herb was harvested at the beginning of blooming, at the full blooming stage and at the end of vegetation. Fresh and dry mass of herb, as well as the content of chlorophyll, flavonoids and phenolic acids in dry raw material were determined. Significant differences between populations and between male and female forms were observed. The „Kabaty” population was characterized by the higher mass of herb, whereas „Bielany” by the highest content of chlorophyll and phenolic acids in herb. The male form was characterized by higher mass of herb as well as higher content of flavonoids in comparison with female form.