PROPORTION OF STRAIGHT-STEMMED TREES OF SCOTS PINE CLIMATYPES IN THE PROVENANCE TRIAL IN SIBERIA
S. R. Kuzmin, N. A. Kuzmina
Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of Science, V. N. Sukachev Institute of Forest, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation
Keywords: Scots pine, provenance, stem straightness, crookedness of trees, seed transfer
Abstract
The analysis of crooked trees proportion of Scots pine ( Pinus sylvestris L.) climatypes was conducted in the provenance trial of Boguchansky forestry district with different soil conditions in the southern taiga of Krasnoyarsk Krai. Averagely, the results of the study showed significantly lower proportion of crooked pine trees in conditions of loam soil, than in conditions of sandy soil. The plantations of western and southern pine climatypes are exposed to different stress factors in conditions of sandy soil. As a result, in young age trees had contortion of stem, including replacement of central shoot. The southern climatypes from forest-steppe territories are differ with high proportion of crooked trees on sandy and loam soils. There are differences in regularities of stem shape variability in the different soil conditions. The significant proportion increase of trees with straight stem was revealed with eastern longitude of origin place increasing in conditions of sandy soil. Mainly, the climatypes from eastern regions of Russia (Siberia, Zabaikalie, Far East) have small percentage (0-20 %) of crooked trees in the provenance trial of Boguchany forestry. The more northerner latitude of climatypes origin places is - the more proportion of trees with straight stems on experimental plots with different soil condition is. The posterities of Scots pine from northern, middle and southern taiga, from European and Asian parts of species range, have small percentage of crooked trees.
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