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In the situation of limited number of pesticides being approved for use in forest nurseries it is necessary to examine new products available on European market that stimulate growth and improve resilience and vitality of seedlings as a part of intgrated plant protection program. Paper presents test of fertilizer Actifos used in seven Polish nurseries in order to stimulate the growth of seedlings...
The aim of the study was to assess the effect of the application of Sincocin AL and inoculation with the fungi Hebeloma crustuliniforme or Laccaria bicolor on the growth and level of mycorrhizal colonization of Scots pine seedlings. Sincocin had no effect on the development of biometric parameters of pine seedlings inoculated with L. bicolor, it limited the growth of non−inoculated seedlings and stimulated...
The paper presents variability in morphological traits of trees in mature Scots pine stands exposed to wind. The analysed parameters included breast height diameter, tree height and length, diameter, lateral area and crown base area. Except for the crown base area and crown diameter, values of the other traits increased with an increase in the distance from the edge of the stand. Crown diameter in...
An assessment of ectomycorrhizal fungi associated with Pinus sylvestris L. growing on abandoned post−agri− cultural soil was performed. The seedlings were growing at three different treatments of soil amendments (harvest residue, bark compost and sawdust). As a control treatment, the soil without any amendments was used. The comparison of ectomycorrhizal structure done ten years after the application...
The aim of the research was to indicate the most useful bioindicator for monitoring the industrial contamination degree in forest communities, mainly polluted with heavy metals and suphur. The Hypogymnia physodes (L.) Nyl. lichen has proved higher ability to accumulate industrial contamination in Scots pine−dominated forest communities comparing to the pine bark.
Spontaneous regeneration in the hurricane−disturbed stand in the Pisz Forest District (N Poland) was registered in the years 2007−2008 and 2011−2012. Breast height diameter and crown size were measured on 10×10 m plots. The analysis also included the soil respiration rate, the decomposition rate of organic matter, soil pH, leaf area index (LAI), content of Mg, Ca, C, N and P in soil, and vegetation...
Research was carried out in Scots pine (Pinus sylvestris L.) stands damaged by strong wind in six locations in Poland. The aim of this study was to analyse the radial variation of compressive strength parallel to grain in the wind−broken trees and neighbouring survivors. Strength tests were conducted in moisture above saturation fibre point. There were no significant differences in the radial distribution...
Deformation of root system as a result of root crookedness, bending or other injuries during plantation represent the main reason predestinating trees to parasitic infection. The objective of the presented work was the determination of the intensified occurrence of root deformation during tree plantation and the appearance of root pathogens. Observations were carried out on 5 sites localized in young...
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