INFLUENCE OF WEATHER CONDITIONS OF THE CENTRAL YAKUTIA CLIMATE ON THE GROWTH AND DEVELOPMENT OF SYRINGA L.

Botanical garden of the Institute of biological problems of cryolithozone SB RAS, located in Central Yakutia in the taiga zone. Studies were carried out during 2014–2018 on 10 species, 3 hybrids and 1 variety of syringa. Phenological observations showed that all syringa species except S. reticulata, S. pubescens, S. emodi fully adapted to the conditions of Central Yakutia. The weather, namely, temperature has an impact on the dynamics of vegetation species. Vegetation begins at the end of the first-early second decade of May. The difference between species is 3–11 days. During this time, plants accumulate an average sum of temperatures of 64.5 о C with an average level of variability of dates (CV = 20.9). Bloom 9 types. The average sum of temperatures over 10 о C was 517.5 о C with an average level of variability (CV = 16). Before the others bloom S. komarowii, S. villosa, S. wolfii. The average sum of temperatures over 10 о C was 484–491 о C for them. S. pekinensis (548.9 о C), varieties ‘President’ (541.5 о C) and S. velutina (530.5 о C) were bloom later than other syringa. Thus, in Central Yakutia are promising types of syringa: S. josikaea, S. oblata, S. komarowii, S. villosa, S. wolfii, and S. velutina.