Repin E.N.
Vestnik IrGSHA 2022; (111): 118-129
The method of climatic analogues is most often used when selecting the source material for introduction. According to its provisions, 21 species of pine have been tested in the arboretum of the Mountain Taiga Station for the entire time of its existence, including: from the regions of North America - 7 species, from Europe - 8 species, from Asia - 4 species. Phenological observations were carried out in order to determine the degree of correspondence between the rhythm of the seasonal development of introducers and seasonal changes in the climatic situation under new conditions for them. To find out the possible causes of the negative result of the introduction, an analysis of the climate of the natural habitats of growing and fallen pines from the arboretum was carried out. Differences between species in the timing of the passage of the main phenological phases during the growing season can be considered insignificant, since they fit into the time period limited by the possible onset of late spring and early autumn frosts. In the course of our work, we were unable to find a clear pattern between the death or preservation of certain species in the arboretum and the climate characteristics of their habitats. The only explainable difference between the dead and preserved species is the assignment of the former to the age of 5-7 years. In abnormally cold winters, young plants of this age die even from areas with a more severe climate than in the place of introduction. And vice versa, vitas from a milder climate, which did not fall under the influence of critical environmental factors in the juvenile period, were successfully introduced into arboretumsThus, the first negative result of the introduction of a species selected by the method of climate analogues cannot be considered final. A repeated, perhaps more than one, introduction of the fallen species is recommended in order to study the limits of their genotypic possibilities.
