Assessment of growth and productivity of Scots pine provenance tests in the Arkhangelsk region in 39-year

For the first time for the region, the survival, growth and productivity of scots pine climates in 39-year-old provenance test of the state network (Plesetsk district of the Arkhangelsk region) were studied. Features of climate redistribution in the collection were traced, the best offspring were selected for use for reforestation within the test region. It has been established that northern offspring (northern and middle subzones of the boreal forest), differing in the I grade of age with high livability, in the II grade of age began the process of differentiation, which led to a decrease in the indicator by almost half. By the end of grade II of age, the offspring of provenance are equalized in height, while maintaining differences related to origin in diameter. The largest diameters of trunks have southern offspring, as well as from the northern subzone of mixed forests, which differ in the lowest rates of survival and quality of trunks. Direct dependence of H/D index with livability is established, which is connected with increase of provenance growth by diameter, increase of escape and curvature of trunks, formation of low-lowered crowns. It has been shown that in cultures of the II class of age, significant correlation of growth and livelihood indicators with the geographical coordinates and climatic characteristics of the places of the initial plantations remains, while with the reserve the connection is lost. Using the assessment approach, in units of standard deviation, the best climates in terms of productivity (reserve) were selected: local mold, Pinezhsky, Vologda, as well as climates from Karelia. The initial plantations of these offspring are included in the range, limited to 60–65 N, 36–44 E. For use in reforestation in the Arkhangelsk region, the use of seeds from plantations of the Urals and Siberia should be completely excluded. In the European part of the country, recommend the use of seeds harvested in three forested areas: South Karelian, Dvinsk-Mezensky and Verkhnedvinsky, limiting the movement of seeds for a distance of not more than 300 km.

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