Home – Home – Jornals – Flora and Vegetation of Asian Russia 2022 number 3

On the basis of 25 years of observations (1990-2014), the types of ecological-cenotic strategies have been determined for laxicaespitose grasses Arrhenatherum elatius and Dactylis glomerata on spoil banks in the Kuznetzk Basin. In 1989-1990, seven agrophytocenoses were created on levelled open-cut spoil banks of “Listvyanskiy” coal mine. Seeding of D. glomerata and A. elatius was carried out on Quaternary and Perm deposits as a part of mixtures of grasses or grasses with legumes. Determining ecological-cenotic strategies was based mainly on revealing the following aspects: above-ground phytomass, projective cover, lifespan, hummock size, numger of generative shoots, ontogenetic spectrum. D. glomerata acts as a violent species in the grass mixtures on deposits of different geological age for the initial 14 years. But D. glomerata is an ecotopic patient species in the grass mixture with Onobrychis arenaria, in sowing with Trifolium pratense, and in the thickened clover-grass mixture (with a higher seeding rate). A. elatius acts as violent species in the grass mixtures on deposits of different geological age for the initial 4-5 years after seeding. During the subsequent years in the grass mixtures, as well as for all years in the mixture with Onobrychis arenaria, A. elatius acts as a phytocenotic patient species. The following features were also noticed. Both species, D. glomerata and A. elatius, persisted in all communities for all years of observatioin. The generative shoots of D. glomerata were emerging rather late, for the 3-4 years of life, which guaranteed fruiting of the shoots. For both species, the ontogenetic spectra laked the senile individuals (and for and A. elatius even the subsenile ones). In particular years, A. elatius was producing large quantities of generative shoots, about 100 per m²; and the numbers of individuals per m² were reaching 800 on account of seedlings.