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The study aimed to determine the influence of site moisture conditions on the health status of European ash. The research plots were located in the Babki, Konstantynowo and Łopuchówko forest districts, as well as in the Poznań Municipal Forests (western Poland). The research was carried out on 30 research plots established in the part of the stands with at least 80% share of ash in the stand species...
The aim of the study is to analyse the size and efficiency of assimilation apparatus of Scots pine (Pinus sylvestis L.) using the site index model for unthinned pine stands (Model Pinus). The size of the assimilation apparatus was regarded in terms of mass of the twigs covered with needles (Ugc) and mass of needles (Ic). It reaches maximum values at the age of 20−25 years, then dynamically decreases...
The aim of the study was to compare the site index of common oak growing under the canopy of Scots pine stands with the values typical for this species on a given habitat. The research was carried out in 20 Scots pine stands with well−developed lower layers of common oak occurring in the fresh mixed forest habitat. The analyzed stands were located in 5 forest districts in central and north−eastern...
Ash is an important component of European forest ecosystems. In recent years the stability of the species has been threatened by the fungus Hymenoscyphus fraxineus (T. Kowalski) Baral, Queloz & Hosoya 2014 (anamorph Chalara fraxinea). Infested stands die out dynamically, and forest management does not have the seeds to restore future populations. Seed orchards may be a suitable place, where the...
All tree breeders cope with the same challenge of the very long time interval of a single breeding cycle. What is more, trees are long−lived, with desirable breeding traits expressing late during their life cycle. Increasing problems with climate change, globalization or economic growth have forced us to accelerate tree breeding and improve selection precision, both of which can be achieved by genomic...
A dynamic process of mortality of Norway spruce stands in south−west Poland, mainly in the Sudety Mts. was observed in 2015. It was associated with an insufficient amount of precipitation in the growing season. This process was intensified by the outbreak of insects, especially bark beetles. The aim of the paper was to verify the hypothesis that the application of the stand damage risk model allows...
The aim of the study was to present two issues concerning forests in the Sudety Mts. (SW Poland): 1) the process of tree mortality in individual years in the period between 2002 and 2018, as well as 2) the analysis of the radial growth of the main tree species (i.e. spruce, larch, beech, fir and Douglas fir). The intensity of the process of tree mortality is evidenced by the volume of wind−broken...
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