Resource characteristics and determination of the value of the raw phytomass of common yarrow (Achillea millefolium L.)

Abstract

As a result of the analysis of the obtained data, the average projective cover of common yarrow in various types of meadow communities was determined - 4.85±O.S7%. The highest average projective coverage was recorded in plant communities of the unions Festucion pratensis - 6.01±1.12% and Dauco-Melilotion (albi) - 6.40±2.16%. The value of the projective cover of common yarrow in these unions of meadow communities varied from 0.5 to 40% and from 2 to 13%. The maximum values of the projective cover (15% or more) of Achillea millefolium were recorded only for 14 populations found in plant communities of the following unions: Arrhenatherion elatioris, Festucion pratensis, Deshampsion caespitosae, and FilipenduUon ulmariae. In them, the average projective coverage of yarrow was 23.43± 2.21%. The highest frequency of occurrence (more than 40%) of this species was noted for the meadow communities of the unions Festucion pratensis and Dauco-Melilotion (albi), in which its high phytocenotic activity is observed. The dependence of the distribution of this species in meadow ecosystems on the ground water level, which was determIned on the basis of the availability of these types of plant communities in certain environmental conditions, was revealed.