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Wyświetlanie 1-4 z 4
Tytuł:
Diversity of spruce ectomycorrhizal morphotypes in four mature forest stands in Poland
Autorzy:
Karlinski, L
Kieliszewska-Rokicka, B.
Powiązania:
https://bibliotekanauki.pl/articles/41194.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Polska
air pollution
mature forest stand
forest stand
ectomycorrhizal diversity
Picea abies
Norway spruce
forest type
environment pollution
soil
Opis:
Ectomycorrhizal communities structure of Norway spruce (Picea abies L. (Karst.) was studied in four mature forest stands: Brenna, Salmopol, Zwierzyniec and Mirachowo. Morphological classification was used to distinguish the major mycorrhizal types associated with spruce in different forest types. Three of the foreststands were located within the natural geographical range of Norway spruce (Brenna, Salmopol, Zwierzyniec) and one (Mirachowo) was located in so-called “spruce-less zone”. The sites differed in terms of environmental pollution. The mountain sites (Brenna, Salmopol) were characterized by relatively high levels of air pollution. The upland forest stand (Zwierzyniec), located in the southeastern part of Poland, was affected by a moderate pollution. The lowland stand in northern Poland (Mirachowo) was free from direct impact of anthropogenic pollution. The level of mycorrhizal colonization was 100% at all the study sites. Thirty-seven mycorrhizal morphotypes were distinguished in total. The number of ectomycorrhizal morphotypes varied between sites from 12 in Salmopol to 28 in Zwierzyniec. From one to three dominant morphotypes were found at the study site. Site-specific morhotypes were also observed. The frequency of mycorrhizal morphotypes differed between the forest stands.
Źródło:
Dendrobiology; 2004, 51; 25-35
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Skuteczność insektycydu Mimic 240 LV w ochronie sosny zwyczajnej Pinus sylvestris L. przed brudnicą mniszką Lymantria monacha L. i barczatką sosnówką Dendrolimus pini L.
Efficacy of Mimic 240 LV in the protection of Scots pine Pinus sylvestris L. against the nun moth Lymantria monacha L. and the pine lappet moth Dendrolimus pini L.
Autorzy:
Głowacka, B.
Bystrowski, C.
Skrzecz, I.
Powiązania:
https://bibliotekanauki.pl/articles/985922.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
barczatka sosnowka
lesnictwo
ochrona lasu
drzewa lesne
sosna zwyczajna
Pinus sylvestris
szkodniki roslin
brudnica mniszka
Lymantria monacha
Dendrolimus pini
zwalczanie szkodnikow
insektycydy
Mimic 240 LV
skutecznosc
insect control
mature stand defoliators
tebufenozide
Opis:
The nun moth Lymantria monacha L. and pine lappet moth Dendrolimus pini L belong to the insects occurring in cyclical outbreak threatening the sustainability of Scots pine Pinus sylvestris L. forests. The populations of both species are reduced in aerial treatments carried out in Poland on thousands of hectares. Therefore there still is a need to implement to the forest practice insecticides that characterize by high efficiency and meet the safety standards for the environment. The aim of the study was to evaluate the effectiveness of Mimic 240 LV (24% of tebufenozide) in the control of nun moth and pine lappet moth populations. Aerial treatments were performed in 55−80−years old Scots pine stands located in three forest districts on the area of Regional Directorate of the State Forest in Zielona Góra (western Poland). The experiment consisted of one aerial spray to limit the population of nun moth with the use of tested insecticide at a dose of 0.3 l/ha and two aerial treatments to control pine lappet moth with a doses of 0.4 and 0.5 l/ha. The treatments were conducted with the use of Dromader M−18 and AN−2R aircrafts equipped with Micronair AU 5000 atomizer. The insecticide was mixed with adjuvant Ikar 95 EC (mineral oil) and water, and applied at a dose of 3 l of spray solution/ha. In the case of L. monacha, evaluation of treatment efficacy showed insect mortality at the rate of 98.7%. The lower and higher doses of Mimic 240 LV caused the mortality of 90.4% and 97.2% of D. pini caterpillars respectively. The obtained results confirm a high efficacy of tested insecticide, which can be recommended for aerial applications in the forest practice.
Źródło:
Sylwan; 2018, 162, 05; 403-410
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ryzyko masowego występowania pędraków chrabąszczy (Melolontha spp.) w strefie ekotonowej drzewostanów dojrzałych na terenie Nadleśnictwa Lubaczów
Risk of the mass occurrence of cockchafer (Melolontha spp.) grubs in the ecotone of mature stands in Lubaczow Forest District
Autorzy:
Niemczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/989889.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany dojrzale
ekotony
ekoton las-laka
szkodniki roslin
chrabaszcz majowy
Melolontha melolontha
chrabaszcz kasztanowiec
Melolontha hippocastani
pedraki
wystepowanie masowe
ryzyko wystapienia
regresja logistyczna
Nadlesnictwo Lubaczow
melolontha spp.
forest−meadow ecotone
mature stand
logistic regression
Opis:
This study evaluated the environmental risk drivers affecting the occurrence of cockchafer grubs in mature stands bordering with open spaces. The following factors were taken into the consideration: the distance from the edge towards the forest interior, the forest site type, species composition, canopy openness and the cover of forest floor with vegetation as well as cutting treatment in some of the investigated stands. In one of the biggest cockchafer outbreak centers in Poland (Lubaczów Forest District; SE Poland) 6 mature stands were chosen and estalished 5 transects in each of them. Each transect was 250 m long and consisted of 6 pits (1×0.5×0.5 m) in a regular distance of 50 m with the first pit on an open space bordering with forest. Pits were used to determine the grub infestation of the soil. In the area of 100 m² around the pit, the general vegetation cover and tree species composition of a stand were characterized. The forest light environment was defined by hemispherical photography. The distance in transect and the fact that stand was harvested were also taken into consideration. The applied logistic regression model demonstrated that the site fertility is the most important factor that significantly increases the risk of cockchafer grubs occurrence. The other characteristics that also cause that stand is more attractive for the cockchafer grubs are: participation of the broadleaved species in stand composition and the dense vegetation cover. Furthermore, the cockchafer grubs occurrence was more frequent in the forest interior than in an open space or at the forest−meadow ecotone.
Źródło:
Sylwan; 2015, 159, 04; 326-335
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ zgnilizny na jakość drewna w zróżnicowanych wiekowo drzewostanach świerkowych
The effect of decay on the quality of wood in spruce stands of different age
Autorzy:
Dardziński, A.
Giefing, D.F.
Powiązania:
https://bibliotekanauki.pl/articles/1009391.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
uzytkowanie lasu
drzewostany swierkowe
drzewostany przeszlorebne
drzewa lesne
swierk
Picea
drewno swierkowe
degradacja drewna
wady drewna
zgnilizna drewna
mature and overmature spruce stand
rotation age
bark stripping
fungal decay
Opis:
The objective of the research was to analyse the level of fungal infection of spruce wood in the mature and overmature stands and determine the age of their technical maturity. Trees from seven stands aged 49−137 were examined. Age was found to have a statistically significant effect on the level of infection of trees caused by wood−rotting fungi. A high infection level was also detected in the bark−stripped spruces of the lower storeys of multi−storeyed stands. The obtained results enabled determination of the age at which spruces are considered mature (technical maturity) for felling at 80−90 years.
Źródło:
Sylwan; 2010, 154, 08; 569-576
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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