Search

The literature widely presents methods that allow evaluating and comparing the decorative qualities of woody plants of different genera and families. But there is no universal method for assessing the decorative qualities of woody plants and the existing methods are not applicable to high latitudes. The purpose of the work was to develop approaches and methods for assessing the decorativeness of woody plants in the Far North. The following approaches were used: the exclusion of the descriptive characteristics of the criterion, the introduction of a question-answer (yes or no) system, the introduction of measurable criteria; accounting of at least 3–5-year data of phenological observations. The assessment of the decorative qualities of woody plants consists of evaluating the crown architectonics, foliage, flowering and fruiting. It includes reduction coefficients that take into account the amount of plant organ damage. The overall assessment of the object can be represented by the sum of all criteria assessments or the decorativeness curve. The advantages of the proposed methodology are the exclusion of the descriptive characteristics of the criterion and the use of criteria calculated on the basis of real data on the plant, while providing the possibility of refining the coefficients for other places of growth.

A list of seeds of cultivated plants collected in 2017-2018 at the Polar-Alpine Botanical Garden-Institute, offered for exchange with other botanical gardens and institutions.

The work is devoted to the study of lateral shoots' seasonal growth of introduced species of Crataegus L. in the Kola Peninsula conditions (as exemplified by the city of Apatity). The alternation of the periods of intensive and weakened growth caused by weather conditions is typical for seasonal dynamics of growth of lateral shoots of the samples Crataegus L. introduced in the central part of the Kola Peninsula. The culmination of the linear growth of shoots occurs with an increase in average daily values of temperature and relative humidity of air. Species affiliation affects the duration of linear growth of lateral shoots of introduced Crataegus species.

In the article results of long-term phenologucal observations of introduced species of Picea A. Dietr. on the Kola Peninsula. The cycle of vegetative development of types of Picea corresponds to the vegetative period of a place of an introduction.