Vitality and variablity of morphological parameters of Medicago falcata L. and Medicago x varia L. Under conditions of the Middle Lena river valley

The research objective was studying the vitality and variability of morphological features of coenopopulations of Medicago falcata L. and Medicago × varia L. in the conditions of the valley of Central Lena. The research was conducted on the crops of the territory of the Re-search Station of the Institute for Biological Problems of Cryolithozone SB RAS (and in a wild), in 13 km from the city of Yakutsk, the capital of the Republic of Sakha (Yakutia). The objects of the research were Medicago falcata L. and Medicago × varia L. For the assessment, the population-ontogenetic methods were used. The structure of variability of morphological parameters was studied using the method suggested by N.S. Rostova. Variability degree was estimated according to G.N. Zaitsev. Coenopopulation vitality was estimated by means of coenopopulation vitality index (IVC) proposed by A.R. Ishbirdin and M.M. Ishmuratova. To achieve the objective the analysis of biometric parameters was per-formed which allowed revealing the peculiarities of plant structure and variability of their parts...