Saabunud / Received 14.10.2021 ; Aktsepteeritud / Accepted 13.03.2022 ; Avaldatud veebis / Published online 13.03.2022 ; Vastutav autor / Corresponding author: Natalia Georgieva; [email protected] creation of grasslands with the participation of species
of local origin, suitable for the climatic conditions of the region and with
increased productivity and stability of yield is an important condition for
ensuring sustainable or organic feed production. For ecological assessment
of meadow species in the semi-mountainous regions of Balkan Mountains
according to indicators and parameters related to productivity and
stability, an experiment is carried out in the period 2011–2019 in the
following variation: Festuca rubra L., Lolium perenne L., Dactylis
glomerata L., Arrhenatherum elatius P.B., Festuca arundinacea Schreb.,
Briza maxima L., Trisetum flavescens L., Agrostis alba L. The experiment
is performed by the block method, and the methods of regression, variance
and nonparametric analysis are used to assess the stability. According to
the values of most of the calculated stability parameters (bi, Si2, λi, σ2i,
PP, W2, S⁽³⁾, S⁽⁶⁾, NP⁽¹⁾) Dactilis glomerata shows good ecological
stability. Complex evaluation by GGE biplot analysis identifies Festuca
rubra L. as a species that favourably combines high productivity with
relative stability. Dactilis glomerata and French ryegrass are characte-
rized by high stability and yield close to the average for the group. These
species are suitable for growing in a wide range of environmental condi-
tions
