How Actinometric Processes Impact Geographical Trial Plantations?
Keywords:
climatype, provenance, solar radiation, annual ring width, AFLR-LibraryAbstract
This study analyzes the long-term measurement data of direct, diffuse, and total solar radiation recorded at the Minsk meteorological station from 1954 to 2023 (70 years). We investigated the relationship between variations in these radiation components and changes in the annual ring width of Scots pine (Pinus sylvestris L.) from different provenances. The trees were grown in a geographical trial plantation located in the Berezinsko-Predpolessky geobotanical region of the Republic of Belarus. The annual influence of incoming solar radiation on the radial growth of Scots pine of different geographical origins was assessed. A moderate to strong negative correlation was established between the tree-ring width of several Scots pine climatypes and the intensity of direct radiation. All studied climatypes were divided into two groups based on the sensitivity of their radial growth to direct solar radiation. Climatypes with an average continentality index in the range of 46–55%, as well as those belonging to the Siberian and Lapland subspecies, showed a negative reaction to an increase in the proportion of direct radiation. Furthermore, the obtained datasets contribute to the AgroForest Landscape Restoration Library (AFLR-Library).
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Copyright (c) 2026 Siarhei U. Rabko, Liliya F. Paplauskaya, Pavel V. Tupik, Nebi Bilir, Tatyana P. Novikova, Arthur I. Novikov
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