The state of Medicago falcate L. coenopopulations under conditions of Khangalassky region of Central Yakutia

The paper represents the results of the study of structure, parameters variability and survival strate-gy of alfalfa Medicago falcata L. coenopopulations (CP) under the conditions of Khangalassky region (Central Yakutia). It was stated that all CPs were normal; CP1 and CP2 were incomplete lacking old plants; while CP3, CP4, and CP5 were complete. Low recovery and replacement indices showed hindered self-maintaining processes. The estima-tion of the complex of organism and population pa-rameters (total average point) revealed CP4 (3.0) to be in the best state. It was characterized by larger area of the circular diagram. CP1, CP2, CP3 and CP5 featured the stable state. This was proved by the absence of discontinuities in diagrams. Such important resource parameters as a number of leaves per stem, a number of inflorescences per stem, a number of flowers per inflorescence, and a number of seedpods per stem had a high level of variability. This was significant for original material to be used for further selection and introduction of alfalfa. For the studied Medicago falcata L. CPs the protective ontogenetic strategy was determined. Along with stress growth, plant development coor-dination was enhanced as well (i.e. morphological entirety of plant is increased).