Wpływ produkcyjnych podsadzeń bukowych na wybrane właściwości gleb siedlisk porolnych i cechy taksacyjne drzewostanów sosnowych w Nadleśnictwie Tuchola

As a result of past forest management practices, where economic considerations dominated over ecological ones, large areas of Polish forestry are currently occupied by pine monocultures. These stands urgently require restructuring (diversification of species composition) based on native deciduous species, under habitat properties and the characteristics of the natural-geographical landscape. Within the territorial range of the Tuchola Forest District, one such species is the European beech (Fagus sylvatica L.). The main objective of the conducted research was to determine the impact of European beech underplanting on the morphological structure of forest litter, as well as the physicochemical and chemical properties of the humus mineral horizons (A/Ap), and their effect on the biometric characteristics of Scots pine. The research was conducted on former agricultural soils in the habitat of a fresh mixed coniferous forest. It was established that beech underplanting in middle-aged pine stands positively affects the morphological structure of forest litter and the physicochemical and chemical properties of the humus mineral soil horizons (A/Ap). Additionally, the research demonstrated the beneficial impact of European beech underplanting on the silvicultural and technical characteristics and current productivity of pine stands.