The features of phenological rhythm of the seasonal development of ericaceae family on the cut-away peatland area of the north of Belarus

The results of the research of phonological rhythms of seasonal development of several plants (V. uliginosum, V. corymbosum and O. macrocarpus (Ait.) Pers) in contrast seasons on a hydrothermal regime on field experiment on a residual peat layer in one of the northern district of the Republic of Belarus are presented. It is shown, that American cranberry, and high-bush blueberry also as a bog blueberry have time to pass here a complete cycle of the development and to generate a crop. Main period of crowing compounds 182+/-4, 175+/-3 and 172+/-4 days accordingly. The earliest onset of all phonological stage in a seasonal cycle of the plant development is representative for the bog blueberry and the latest one – for American cranberry. Terms on onset of phonological stage are defined by quantity of necessary heat individual for each species of Ericaceae. The minimum requirements for which are established at a bog blueberry and maximum – at American cranberry. Gradual leveling of the current distinctions by the season end is observed.