The effect of meteorological factors on wood macrostructure in mixed pine stands (Pinus sylvestris L.) on different soils

The present work analyzes the relationship between meteorological factors and soil conditions and the annual radial increment of naturally formed pine stands of the boreal zone. It has been noted that on dual sandy loam and drained illuvial sandy loam soils, the annual increment of pine trees has greater response to the sum of temperatures than on loamy soils. Under different soil and hydrological conditions, when the pine share in the composition changes, the structural elements of xylem demonstrate an increasing dependence of annual increment on the share of the species in the composition of the plantation. This dependence is stronger for early wood than for late wood. At coarser soils and decreasing pine share in the stand composition, the growth of pine's macrostructural xylem elements becomes less influenced by meteorological factors.