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Wyszukujesz frazę "forest type" wg kryterium: Temat


Tytuł:
Illuminance under canopy in different types of forest in the northern taiga
Autorzy:
Feklistov, Pavel
Sobolev, Alexandr
Barzut, Oksana
Neverov, Nikolay
Powiązania:
https://bibliotekanauki.pl/articles/2041229.pdf
Data publikacji:
2021
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
illumination
forest type
spruce forests
pine forests
Opis:
The illumination under the canopy in different types of pine and spruce forests is considered. The research was carried out in different points of the Northern taiga of the Arkhangelsk region. Illumination was measured using a luxmeter in different directions: at the level of the moss-lichen layer, at the level of the grass-shrub layer and at a height of 1.3 m; at different distances from the tree trunk; at different distances from the edge of the forest. Illumination in pine forests at the level of the moss-lichen layer is 2.3 times higher than in spruce forests. Under the canopy of spruce forests, it is 1–3%, and in the pine forests, 3–9% of the illumination in the open. Illumination from tree trunks to the edge increases in pine and spruce forests equally. The lowest illumination is observed at the level of the moss-lichen layer, then it increases to the grass-shrub layer, and then practically does not change. However, the difference between pine and spruce forests is consistently high 47%. The decrease in illumination in the tree stand as it moves away from the edge in blueberry pine forests is observed up to a distance of 10 m from the edge, and in blueberry spruce forests up to 6 m.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2021, 63, 2; 112-115
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System klasyfikacji gospodarstw leśnych w wielofunkcyjnym i proekologicznym modelu leśnictwa
A classification system of stands in a proecological model of multifunctional forest managment
Autorzy:
Przybylska, K.
Powiązania:
https://bibliotekanauki.pl/articles/1023086.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo wielofunkcyjne
klasyfikacja
gospodarstwa lesne
lesnictwo
lesnictwo proekologiczne
economic division
natural forest type
forest stand type
forest function
Opis:
The paper presents the concept of a schematic division of a forest into stand farms using two criteria i.e. forest function and natural forest type. Forest function is understood as the function dominating in a stand, namely productive, protective or social. The natural forest type was identified with the name of a habitat type because in forest typology habitat characteristics and stand attributes are treated jointly.
Źródło:
Sylwan; 2005, 149, 09; 3-9
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficiency of different forest types in carbon storage depends on their internal structure
Autorzy:
Gheorghe, I.F.
Biris, I.A.
Valcu, C.-M.
Powiązania:
https://bibliotekanauki.pl/articles/57973.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
forest vegetation
efficiency
forest type
carbon storage
internal structure
temperate forest
productivity
Opis:
Forest vegetation is a key factor in the maintenance of global carbon cycle balance under the present climate change conditions. Forest ecosystems are both buffers against extreme climatic events accompanying climate change and carbon sinks diminishing the environmental impact of anthropogenic greenhouse gas emissions. We investigated the influence of stand structure and site characteristics on the productivity and carbon storage capacity of temperate forest types. Predictors of species productivity were parameters such as stand density, age, height, average diameter and wood density. Morus alba (L.) was more productive than average both in terms of annual volume increment and annual biomass gain, while Quercus sessiliflora (Matt.) Lieb. and Quercus frainetto (Ten.) were significantly less productive than average. Differences in stand productivity were explained by stand density, age, height, altitude, type of regeneration and species composition. Statistically significant differences were measured between the productivity of stands dominated by different woody species, with low productive stands dominated by slow growing species with high wood density like Quercus or Fagus, and highly productive stands rich in fast growing species with low wood density like Populus or Salix. Stands with different plant communities in the underlying herbaceous layer also tended to have different levels of productivity.
Źródło:
Acta Societatis Botanicorum Poloniae; 2010, 79, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zróżnicowanie warunków glebowo − siedliskowych podstawą bioróżnorodności Lasów Karpackich
Variation in soil-and-site conditions - a basis of biodiversity of Carpathian forests
Autorzy:
Brozek, S.
Sikorska, E.
Zwydak, M.
Lasota, J.
Powiązania:
https://bibliotekanauki.pl/articles/972887.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
warunki siedliskowe
siedliska lesne
sklad gatunkowy
Karpaty
lasy gorskie
roznorodnosc biologiczna
warunki glebowe
lesnictwo
typy lasow
forest type
montane forest site type
Carpathians
Opis:
The paper depicts the soil−and−site conditions of the Carpathian forests wherein forest site types and stand species biodiversity develop. Individual forest site types were described in conjunction with the location characteristics, soil properties and importance of admixture species.
Źródło:
Sylwan; 2006, 150, 04; 14-25
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
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:
Current state of Picea abies stands in the Ukrainian Carpathians
Autorzy:
Guz, M
Powiązania:
https://bibliotekanauki.pl/articles/41137.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
international conference
Europe
forest ecosystem
plant breeding
tree
Norway spruce
Picea abies
environmental function
forest type
composition
productivity
Carpathians Mountains
Ukraine
Opis:
The paper provides a detailed characterisation of Norway spruce stands in the Ukrainian Carpathians. The majority of natural spruce stands in Ukraine occur in Polesie, while artificial regeneration is spread all over the country. The most densely forested part of Ukraine is the Carpathian region with 41.1% of forest-covered area (2.1 million ha). Spruce-dominated stands occupy about 700 thousand hectares (30%) of the forested area of the state forest fund in the Ukrainian Carpathians, and another 10% of the mixed forests contain 10 to 30% of spruce. Besides pure spruce stands, there are beech-spruce, beech-fir-spruce, and cedar-spruce stands. The most productive stands (750-900m3 stem wood per ha) grow in the middle and lower parts of slopes at 1100-1200 m a.s.l. which have favourable soil and climate conditions. Since the second half of the 20th century, spruce stands in the substantial part of the Ukrainian Carpathians have declined under the influence of complex anthropogenic and natural factors. Although the present condition of most spruce forests in this region remains satisfactory, the degradation processes and the ban imposed in 2006 on planting spruce on non-spruce forest sites (in state forests) may decrease their area in the longer term.
Źródło:
Dendrobiology; 2009, 61 Supplement
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
European ash in the Bardzkie Mountains - species characterization based on forest documentation
Autorzy:
Filipiak, M
Dolatowska, A.
Kmiecik, M.
Pilarek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/40973.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Sudetes Mountains
Bardzkie Mountains
forest habitat type
European ash
Fraxinus excelsior
forest documentation
ecology
forest stand composition
Opis:
On the basis of forest taxation data the presence of European ash in the Bardzkie Mountains area (central part of the Sudety Mountains) was analysed. This included the reckoning of the number of sites and the area covered by ash in various forest habitat types, age classes, altitude zones and on variously slanted and exposed mountain sides. The decline in the number of ashes in younger age classes and complete absence of trees older than 140 years have been noted. In the Bardzkie Mountains ash is the main species forming the forest on mountain riparian forest stands (a 43% participation in the area of forest of this type). Considering the number of specimens most ashes are scattered in mountain broadleaved forest. To the altitude of 650 m ash’ participation in the forest stand composition is stable (30% of analysed locations), but it occupies only 2.6% of total forest area.
Źródło:
Dendrobiology; 2004, 52; 17-21
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pracochłonność i koszty prac leśnych w wybranych typach siedliskowych lasu
Labour consumption and costs of forest work for selected type of forest site
Autorzy:
Białczyk, W.
Molendowski, F.
Powiązania:
https://bibliotekanauki.pl/articles/288495.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
typ siedliskowy lasu
nakłady pracy
koszty
type forest site
labour consumption
costs
Opis:
Wiedza na temat związku pomiędzy pracochłonnością, kosztami zagospodarowania lasu i pozyskania drewna, a typem siedliskowym lasu może być wykorzystana w procesie projektowania prac leśnych i konstrukcji maszyn. Dlatego też w niniejszej pracy przedstawiono wpływ typu siedliskowego lasu na nakłady pracy i koszty zagospodarowania lasu i pozyskania drewna. Spośród badanych siedlisk najniższe nakłady pracy na jeden hektar odnowienia lasu stwierdzono na siedlisku BMśw, a najwyższe na BMb. Nakłady pracy, koszty pielęgnacji i ochrony drzewostanu są zbliżone na siedliskach borowych, a wyższymi od nich charakteryzuje się siedlisko LMw. Nakłady pracy i koszty pozyskania drewna są wyższe niż odnowienia, pielęgnacji i ochrony lasu. Różnica w łącznych nakładach pracy zagospodarowania lasu i pozyskaniu drewna pomiędzy typem siedliskowym lasu mieszanego, a boru świeżego wyniosła 632 rbh/ha.
The knowledge of the influence of type forest site on the values of labour consumption and costs of forest site disposal and logging wood is also of importance in the design of forest work and machines. The paper presents characterizing of influence of type forest site on the values of labour consumption and costs of forest site disposal and logging wood. The data obtained in the tests were analyzed and were fond to be investigated forest work are significantly affected by type of forest site. Between the coniferous forest site and leafy forest site differences of mean value of labour consumption were 632 man-hours.
Źródło:
Inżynieria Rolnicza; 2006, R. 10, nr 2 (77), 2 (77); 111-118
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potrzeby przebudowy drzewostanów w Lasach Państwowych
The needs related to the reconstruction of stands in the State Forests
Autorzy:
Czuba, M.
Powiązania:
https://bibliotekanauki.pl/articles/1018668.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewostany gospodarcze
przebudowa drzewostanow
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
lesnictwo
forest management plan
adjustment of stands to site conditions
managed forest type
complete stand
conversion
partial stand conversion
Opis:
The paper presents a division of the State Forests stands by the degree of adjustment of species composition of stands to site conditions. An assumption was made that the stands whose species composition is not adjusted to the occupied biotope should be urgently rebuilt, especially those featuring low stability.
Źródło:
Sylwan; 2006, 150, 12; 33-38
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Skład gatunkowy i biomasa nadziemna krzewów w podszycie drzewostanów Puszczy Niepołomickiej
Species composition and aboveground biomass of shrubs in the understory of the Niepolomice Forest
Autorzy:
Orzeł, S.
Powiązania:
https://bibliotekanauki.pl/articles/989741.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Puszcza Niepolomicka
podszyt
krzewy lesne
sklad gatunkowy
biomasa nadziemna
warunki siedliskowe
niepołomice forest
understory
shrub biomass
forest site type
Opis:
The understory, a layer composed predominantly of shrubs that perform an important phytomeliorative function, has rarely been the subject of research on the productivity and biomass. The aim of this paper was to specify the occurrence of understory aged ≥10 years as well as its species composition and the share of individual species in the biomass in the Niepołomice Forest (S Poland). The analysed features were related to the age and site conditions of the stands. The research material consisted of dry biomass of shrubs growing within circular sample plots spaced 500 m apart from each other. Dead and live (damaged and undamaged) shrubs of dbh<7 cm were cut at a ground level to determine their wet mass and samples were taken to determine the dry mass. The mass of live shrubs was calculated based on empirical formulas. 368 sample plots were set up in total. Shrubs (13 species) were observed on 76.1% of plots. Shrubs were the most common in the stands of II and IV age groups (87% of plots). No shrubs were observed on the plots with stands older than 160 years. The most common species was Frangula alnus (56.8% of the plots). Quite common ones included Sorbus aucuparia (27.7%) and Padus avium (12.8%). Cornus sanguinea, Prunus spinosa, Salix caprea and Viburnum opulus were observed on less than 1% of the sample plots. Frangula alnus and Padus avium were inventoried in as many as 8 forest site types. The largest amount of shrubs (10 species) were observed in moist broadleaved forest stands, while the fewest (2 species) in boggy mixed broadleaved and ash−alder swamp stands. Over 56% of the aboveground biomass were live shrubs of dbh <7 cm (868.6 kg/ha), almost 29% (444.1 kg/ha) were shrubs of the dbh ≥7 cm, and around 15% (227.6 kg/ha) of the biomass were dead shrubs. The total aboveground biomass of shrubs in the understory of the analysed stands equaled, on average, to 1,540 kg/ha. 94% of the biomass was the aboveground woody biomass including bark (1,448 kg/ha). The dry mass of leaves amounted to 92 kg/ha (6%). Due to high variability of the understory biomass, the estimation error of its average amount was almost 11.4% for total biomass and 13.5% for leaves.
Źródło:
Sylwan; 2015, 159, 10; 848-856
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of environmental conditions on surface water quality in the Zimnik and Czyrna catchments of the Beskid Śląski
Wpływ warunków środowiskowych na jakość wód powierzchniowych w zlewni Zimnika i Czyrnej w Beskidzie Śląskim
Autorzy:
Małek, S.
Krakowian, K.
Powiązania:
https://bibliotekanauki.pl/articles/292743.pdf
Data publikacji:
2009
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
Beskid Śląski
budowa geologiczna
jakość wód
skład gatunkowy
typ siedliskowy lasu
wody powierzchniowe
Beskid Śląski Mts.
forest type
geology
species composition
surface water
water quality
Opis:
The study was carried out in the year 2004 in the Zimnik and Czyrna catchments situated on opposite slopes of Skrzyczne in the Beskid Śląski Mts. Water samples collected from streams during three sampling sessions were analysed. The first session was carried out during snowmelt (April/May), the second during intensive rainfall in the vegetation season (June) and the third - during low water level (October). A data set consisting of conductivity, water pH, concentrations of major anions (Cl-, NO3-, SO42-) and cations (NH4+, Na+, K+, Ca2+, Mg2+) was produced and waters were then classified according to Polish standards (years 2002 and 2004). Chemical composition of stream waters depended on physical and geological properties of drainage areas and on seasonal changes of water level in the catchment. Water class depended also on precipitation and on forest type. It was found that water from most sampling points in streams was unfit for drinking - 66 out of collected 89 samples were beyond the first A1 category and the main reason for that was too low pH and high concentrations of NH4+ and NO3-. During intensive rainfall in the vegetation season higher washing out of cations was observed from beech and multispecies forest stands than from spruce stands, which partly neutralized water pH and in consequence improved water quality. This phenomenon should be considered while afforesting streams neighborhoods where water is or will be used as a source of drinking water.
Badania zostały przeprowadzone w 2004 roku w zlewniach Zimnika i Czyrnej leżących na przeciwległych stokach Skrzycznego w Beskidzie Śląskim. Analizie poddano wody pobrane z potoków podczas trzech sesji pomiarowych. Pierwsza odbyła się podczas roztopów śniegu (kwiecień/maj), druga sesja w trakcie intensywnych opadów deszczu w okresie wegetacji (czerwiec), trzecia przy niskim stanie wód (październik). Analizowano odczyn i przewodność elektrolityczną, oraz stężenie anionów (Cl-, NO3-, SO42-) i kationów (NH4+, Na+, K+, Ca2+, Mg2+). Wyniki poddano klasyfikacji wód pitnych wg polskich norm (z 2002 i 2004 r.). Skład chemiczny wód powierzchniowych zależy od fizycznych i geologicznych właściwości utworów budujących zlewnie. Przynależność wód do klasy zależy również od wystąpienia i rodzaju opadów atmosferycznych oraz składu gatunkowego. Stwierdzono niezdatność dużej części badanych wód do picia - 66 z 89 pobranych prób znajdowało się poza klasa A1, głównie ze względu na niski ich odczyn oraz wysokie stężenie NH4+ i NO3-. W drzewostanach bukowych i wielogatunkowych zaobserwowano znacząco większe niż w świerkowych wymywanie kationów podczas intensywnych opadów deszczu, co w pewnym stopniu neutralizowało odczyn wód a tym samym podnosiło jakość wód. Ten fakt powinien być brany pod uwagę przy zalesianiu terenów źródliskowych i sąsiadujących z potokami w obszarach, gdzie wody te wykorzystywane są lub będą w przyszłości, jako dodatkowe ujęcia wód pitnych.
Źródło:
Journal of Water and Land Development; 2009, no. 13a; 205-223
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wpływu wybranych zabiegów hodowlanych i typów siedliskowych lasu na koszt pozyskania surowca drzewnego w czyszczeniach i trzebieżach
Evaluating the impact of silvicultural treatments and forest habitat type on the cost of timber harvest in cleanings and thinnings
Autorzy:
Adamowicz, K.
Gostołek, R.
Jaszczak, R.
Szczypa, P.
Szramka, H.
Powiązania:
https://bibliotekanauki.pl/articles/989459.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
gospodarka lesna
typy siedliskowe lasu
zabiegi hodowlane
pozyskiwanie drewna
koszty
trzebieze
czyszczenia pozne
forest economics
forest habitat type
costs
silviculture
Opis:
Integrating the economic aspects of forest management (cost) with ecological elements of timber production (habitat type) significantly contributes to a better understanding of forest growth and utilisation. The type of silvicultural treatments and forest habitat types determine number of economic activities carried out in the stands and have an important impact on the associated costs. The aim of the study was to describe the impact of silviculture treatments and types of forest habitat on unit timber harvesting cost. We summarised the cost of timber logging depending on the harvest practices and types of habitats. In total, costs of treatments performed on the 2.5 thousand ha area were analysed. Obtained results were combined in relation to average unit costs of raw timber logging from individual habitats and silviculture treatments such as late cleanings and thinnings. The studied impact was assessed with standard deviation (SD) based on the assumption that the higher its value, the more important role of silvicultural treatments and forest habitats in defining the cost of raw timber harvesting. Our study showed that both factors (type of forest habitat and silvicultural treatment) had an effect on variability of timber logging costs. Comparing deciduous and coniferous habitats, higher costs were reported for the latter one. The highest unit cost of timber logging was found on the fresh coniferous habitat, while the lowest on the wet mixed forest. Moreover, the highest cost was reported for timber raw material harvested from late cleanings and the lowest from late thinnings. SD of the average cost of timber harvest ranged from 12.67 to 13.53 PLN depending on the silviculture treatments and from 0.68 to 2.39 PLN depending on the forest type. Our findings are important preliminary steps in broader study regarding revenues generated from forest stands growing on different habitats. Eventually it would help in assessing the profitability of economic activity that depends on environmental conditions of forest management.
Źródło:
Sylwan; 2016, 160, 12; 993-1001
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Program Copernicus źródłem informacji o dominującym typie drzewostanu w Polsce – ocena dokładności krajowej warstwy wysokorozdzielczej
Copernicus Program as a source of information on the dominant leaf type in Poland – assessment of the accuracy of the national high resolution layer
Autorzy:
Mirończuk, A.
Leszczyńska, A.
Hościło, A.
Powiązania:
https://bibliotekanauki.pl/articles/979243.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
program Copernicus
dane satelitarne
warstwa wysokorozdzielcza
lasy
stopien zmieszania
Polska
leśnictwo
źrodła informacji
typy lasów
copernicus
high resolution layers
forest type
remote sensing
Sentinel-2
Opis:
Information on the spatial distribution and variability of forests is important in monitoring of forest resources, biodiversity assessment, threat prevention, estimation of carbon content and forest management. The Pan−European High Resolution Layers (HRLs) produced as part of the European Earth Monitoring Programme – Copernicus provide detailed information on the land cover characteristics in Europe. The HRLs are produced using satellite imagery based on an interactive rule−based classification. There are the following HRL themes: imperviousness, forest, water and wetness and grasslands. The HRLs are available for the reference year 2012 and 2015, at the spatial resolution of 20 m. The forest related HRL consists of tree cover density, dominant tree type and forest type products. In this study, we performed a) the qualitative and quantitative analysis of the accuracy of the dominant leaf type (DLT) layer for the 2015 year at the national scale, and b) detailed analysis of the data quality at the forest stand level over the selected forest districts. The DLT layer was compared with the national orthophotos. The detailed analysis was carried out using Sentinel−2 images and forest inventory data obtained from the Forest Data Bank over the selected forest districts. The accuracy analysis of the national DLT layer revealed the high omission error equal to 18.8%, and lower commission error of 5.4%. The omission error is mostly related to the omitted orchards and young forest plantations, which are included in the DLT layer. The commission error of the broadleaved forest is related mostly to the small patches of coniferous forest that was misclassified as broadleaved. In general, commission errors were identified more frequently in broadleaved forest than in the coniferous forest. In many locations the patches of coniferous forest were misclassified as broadleaved forest. In general, the area of the broadleaved forest is overestimated.
Źródło:
Sylwan; 2020, 164, 02; 151-160
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kolej rębu drzewostanów sosnowych według kryteriów ekonomicznych
Rotation age of pine stands on the basis of economic criteria
Autorzy:
Bednarski, K.
Miscicki, S.
Powiązania:
https://bibliotekanauki.pl/articles/972950.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
pozyskiwanie drewna
drzewostany sosnowe
kryteria ekonomiczne
leśnictwo
gospodarstwa zrębowe
kolej rębu
final cut
forest habitat type
income
maturity
value
Opis:
There is a lack of an acceptable and practical method for calculating the optimal moment at which a forest stand is considered ready for felling. The aim of the research was to: (1) develop a concept for the calculation of the rotation age for forest stands based on economic criteria and (2) develop a methodology for obtaining and processing empirical data necessary for such calculation. It is assumed that stands are felled at the age affecting the age structure (area of age classes) of a forest in such a way that the difference between revenues from the sale of timber harvested in inter−mediate cuts and final cuts and the costs of timber harvest, silvicultural management, forest protection and administration is the largest. The developed method of calculating the rotation age was tested on the example of three Scots pine forests under the clear−cutting system representing typical forest habitats. The collected empirical material consisted of (1) own measurement data used to determine the value of the growing stock, and (2) data from the State Forests Information System used to determine the management costs, timber prices and the volume of timber harvested from intermediate cuts. These data helped to calculate the relationship between the income from a forest (including: revenues from the final and intermediate cuts, costs of forest management as well as timber harvesting and extraction) and the rotation age. The highest net income was when the rotation age was 108−125 years. The more fertile habitat, the shorter was the rotation age. The proposed methodology can be treated as a useful tool for the calculation of rotation age related to forest management in Poland. The dependence of income from a forest on the rotation age can be used to calculate losses that may arise when other than an optimal rotation age is applied.
Źródło:
Sylwan; 2016, 160, 03; 197-206
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bezkręgowce zasiedlające owocniki hubiaka pospolitego (Fomes fomentarius) w różnych typach siedlisk leśnych
Invertebrates of basidiocarps of tinder fungus (Fomes fomentarius) in different types of forest habitats
Autorzy:
Lik, M.
Powiązania:
https://bibliotekanauki.pl/articles/1008881.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
siedliska lesne
hubiak pospolity
Fomes fomentarius
zasiedlenie
bezkregowce
grupy systematyczne
fruiting bodies
fomes fomentarius
forest habitat type
settlement
Opis:
The aim of the study was to describe changes in abundance and settlement (number of specimens per 100 g of fungi) of basidiocarps of tinder fungus (Fomes fomentarius) by the invertebrates in different types of forest habitats. Tinder fungus that contained the invertebrates were collected from four sample plots located in the Tuchola Forest and the Myślęcinek – an area located within the administrative borders of Bydgoszcz city. Statistically differences between the settlement of basidiocarps by the invertebrates in different types of forest habitats were found.
Źródło:
Sylwan; 2011, 155, 08; 546-554
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł

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