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Tytuł:
Fluorescencja chlorofilu igiel klonow jodlowych [Abies alba Mill.] w archiwach genetycznych zlokalizowanych na roznych wysokosciach nad poziomem morza w Karkonoskim Parku Narodowym
Chlorophyll fluorescence of silver fir [Abies alba Mill.] clone needles in genetic archives located at different altitudes in the Karkonosze National Park
Autorzy:
Niemczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/46158.pdf
Data publikacji:
2009
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
Karkonoski Park Narodowy
hodowla lasu
drzewa lesne
wysokosc nad poziomem morza
jodla pospolita
Abies alba
klony
igly jodlowe
fluorescencja chlorofilu
pomiary
maksymalna wydajnosc kwantowa
tlumienie niefotochemiczne
tempo transportu elektronow
Źródło:
Leśne Prace Badawcze; 2009, 70, 3; 213-221
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
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:
Wzory do określania pierśnicowej liczby kształtu mieszańców selekcyjnych topoli
Equations for diameter at the breast height form factor of poplar and its hybrids
Autorzy:
Niemczyk, M.
Bruchwald, A.
Powiązania:
https://bibliotekanauki.pl/articles/989038.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
plantacje roslin energetycznych
drzewa szybkorosnace
mieszance
topola
Populus
piersnicowa liczba ksztaltu
wzory empiryczne
populus
form factor
empirical equations
Opis:
Knowledge of diameter at the breast height (DBH), tree height and form factor allows to estimate tree volume, which is one of the most important measures in forestry. The paper presents empirical equations for the determination of DBH form factor of different species and hybrids of Populus sp. The study was set up on short−rotation plantation in Wichrowo Forest District (northern Poland). Four poplar hybrids at the age of six were taken into account: P. × generosa × P. trichocarpa, P. trichocarpa, P. maximowiczii × P. trichocarpa, Populus × canadensis. In total, 427 trees were felled and individually measured in one meter sections. The estimation equations are based on the relationships between form factor and one or some independent variables derived from diameter at breast height and height. We used determination coefficient as a goodness−of−fit measure. In addition, standard error of estimates from this dataset was calculated. The standard error values varied from 5.8 to 6.6% depending on the formulae and Populus hybrids. Th e equations proposed in this paper enable the determination of the discussed form factor for varied poplar cultivars and can be treated as a regional equations.
Źródło:
Sylwan; 2017, 161, 05; 413-421
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proweniencyjno-rodowa zmienność terminu wiosennego rozwoju pąków brzozy brodawkowatej (Betula pendula Roth)
Provenance-family variation in the time of spring bud development in silver birch (Betula pendula Roth)
Autorzy:
Wojda, T.
Niemczyk, M.
Kowalczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/994522.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
fenologia
drzewa
brzoza brodawkowata
Betula pendula
paki lisciowe
rozwoj pakow
rozwoj wiosenny
proweniencje
rody hodowlane
bud development time
provenance
family
heritability
Opis:
The aim of this study was to assess the variation of bud development time of the Polish and Latvian silver birch provenances and its impact on tree growth in the juvenile phase. The assessment of bud development was carried out in 2008 and 2009 on three experimental plots with ten Polish and three Latvian provenances using a six−point scale. Browsk, Augustów and Latvian provenances are in the group of provenances that develop early buds, while the provenances from Łobez, Młynary and Golub develop late buds. The spring development of silver birch buds shows a clinal variation depending on the longitude. The spring leaf development of the eastern provenances begins earlier than the western ones. The dependence of growth traits on the time of bud development has not been sufficiently proven and requires further research.
Źródło:
Sylwan; 2012, 156, 03; 197-207
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura drzewostanów a populacje cisa pospolitego (Taxus baccata L.) w rezerwatach przyrody "Cisy Rokickie" i "Bogdanieckie Cisy"
Stand structure and populations of yew (Taxus baccata L.) in the Cisy Rokickie and Bogdanieckie Cisy reserves
Autorzy:
Dobrowolska, D.
Olszowska, G.
Niemczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/46236.pdf
Data publikacji:
2012
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
rezerwaty przyrody
rezerwat Cisy Rokickie
rezerwat Bogdanieckie Cisy
drzewa lesne
gatunki chronione
cis pospolity
Taxus baccata
struktura drzewostanu
zywotnosc
pokrycie powierzchni
odnowienia naturalne
pokroj
Źródło:
Leśne Prace Badawcze; 2012, 73, 4
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przydatność hodowlana wybranych odmian topoli w plantacjach energetycznych o krótkim cyklu produkcji
Silvicultural potential of selected poplar cultivars growing on short rotation plantations
Autorzy:
Niemczyk, M.
Wojda, T.
Kantorowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/989267.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
topola
uprawa plantacyjna
plantacje roslin energetycznych
surowce energetyczne
biomasa
topola sekcji Aigeiros
topola sekcji Tacamahaca
przydatnosc hodowlana
poplar
energy plantation
short rotation coppice
biomass
Opis:
The use of biomass for energy purposes is an important European Union policy. In light of the restrictions concerning the use of the full−value wood from forests for energy purposes, short rotation forestry can become an alternative source of woody biomass. In this context, the most promising species is poplar (Populus spp.), productivity of which depends on various aspects such as plant spacing, cutting cycles, fertilization and cultivar characteristics. The aim of this study was to assess the possibility of cultivation of ten selected poplar clones from the section Aigeiros and Tacamahaca in short−rotation coppice in the climatic conditions of Poland. An experiment was set up in the north−eastern part of Poland in the Wichrowo Forest District. Survival, tree stocking, and biomass yield were compared. Productivity of clones was examined in five−year cutting cycle. The highest dry biomass yield (7.8 t/ha/yr) was achieved by the clone 'Hybrida 275'. In contrary, the biomass yield of the worst clone ('AF−8') amounted to 2 t/ha/yr. Some other Italian clones, such as 'AF−6' and 'MON' were not able to adapt to the local conditions at all and were excluded from the experiment. Because of the need to implement the full economic analysis of short rotation poplar plantations, it would be important to study propagation ability of certain currently studied varieties of poplar in subsequent rotations and with different production cycle period length up to the end of biomass production on a given plantation. Resistance to diseases of energy poplar plantations should also be researched.
Źródło:
Sylwan; 2016, 160, 04; 292-298
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ ażurowości drzewostanu osłaniającego na wzrost cisa pospolitego (Taxus baccata L.)
The influence of stand canopy openness on the growth of common yew (Taxus baccata L.)
Autorzy:
Niemczyk, M.
Żółciak, A.
Wrzesiński, P.
Powiązania:
https://bibliotekanauki.pl/articles/1312166.pdf
Data publikacji:
2015
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
drzewa lesne
ochrona ex situ
cis pospolity
Taxus baccata
wzrost roslin
powierzchnie zachowawcze
drzewostany oslaniajace
gatunki oslonowe
azurowosc
common yew
ex-situ conservation plots
canopy openness
Opis:
The aim of this study was to evaluate the development of common yew, Taxus baccata L., with respect to canopy openness. The plants were growing in ex-situ conservation plantations (established in 2008) in the understory of different tree species. Eleven forest plantations belonging to the following five forest districts were inventoried: Rokita, Baligród, Kołaczyce, Międzylesie and Henryków. In each plantation, the height and height increment of 200 yews were measured and gap light transmission indices were determined. The canopy species affecting yew growth most significantly were oak (Quercus sp.) and Scots pine (Pinus sylvestris L.), followed by Norway spruce (Picea abies Karst.), silver fir (Abies alba L.) and European beech (Fagus sylvatica L.). The most favorable development of yew occurred at 30% canopy openness. An increasing light transmission index correlated with a decrease in the proportion of treelike yews. An insufficient amount of light resulted in a low height increment of yews growing under the canopy and an extended period of direct competition of yews with herbaceous species.
Źródło:
Leśne Prace Badawcze; 2015, 76, 1; 42-48
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena rębni gniazdowej na podstawie drzewostanów uszkodzonych w lasach nizinnych Polski
Evaluation of the group cutting system on the basis of damaged forests in lowland Poland
Autorzy:
Łukaszewicz, J.
Niemczyk, M.
Dmyterko, E.
Bruchwald, A.
Powiązania:
https://bibliotekanauki.pl/articles/989687.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
przebudowa drzewostanow
rebnie gniazdowe
rebnie czesciowe gniazdowe
drzewostany nizinne
uszkodzenia drzewostanow
czynniki abiotyczne
czynniki biotyczne
group cutting system
sawtimber stand
demaged stand
Opis:
The paper compares the proportion of damaged stands managed under group cutting system (group clear cutting and group shelterwood cutting) with the analogous stands where cuts had not been performed. The empirical material came from the database of the State Forests Information System and covered all forest districts located in Polish lowlands. To evaluate the group cutting a test of differences between the fractions of the elements distinguished in the population was used. The first population involved sawtimber stands in which no group cuts had been performed in the past decade. The number of damaged stands was determined for this population and their percentage share was established. A similar procedure was applied to the second population of stands in which the group cutting was employed. A damaged stand was assumed to be one in which the volume of windbroken and windfallen trees and deadwood harvested in the past 10 years exceeded the volume set in the given formula (1). The performed analysis shows that after several years, the proportion of damaged stands in which gaps were established is significantly higher (57.2%) than in the stands without cut patches (32.9%). Stands with patches demonstrate a significant, statistically greater susceptibility to damage from abiotic and biotic factors. The proportion of damaged stands managed under the group shelterwood cutting (60%) is larger than that under the group clear cutting (55.4%). Spruce is the most vulnerable to damage, while alder − the least vulnerable. On average, the higher proportion of damaged forests, mainly pine and oak forests is in the territory of the Bialystok Regional Directorate of the State Forests (RDSF) (tab. 2) being lower in the territory of the Warsaw RDSF where damaged pine stands are more frequent (tab. 3). In areas with a high probability of damage to stands group cut should be limited, and in spruce stands – totally abandoned. Time regimes should also be established applying the group cutting by shortening the period of reconstruction of the entire forest stand.
Źródło:
Sylwan; 2015, 159, 01; 3-12
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka wybranych drzewostanów jodłowych Beskidu Niskiego i sposoby ich zagospodarowania
The characteristics of selected fir stands in Beskid Niski and the method of their management
Autorzy:
Bruchwald, A.
Dmyterko, E.
Niemczyk, M.
Łukaszewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/989908.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
gory
Beskid Niski
drzewostany jodlowe
struktura drzewostanu
liczba drzew
piersnicowe pole przekroju
miazszosc drzew
zagospodarowanie lasu
stand layer
multi−layer structure
bdq method
abies alba
Opis:
Assuming multilayer structure as optimal for silver fir stands, we attempted to answer the following questions: 1) how to describe such structure, 2) to what extent does the structure of a particular stand differ from the optimal one, and 3) how to obtain the optimal structure. The study was based on the material collected in 12 stands in the Nawojowa Forest District (S Poland). Three to five 0.04 hectare circular plots were established in each stand, and diameters at breast height (d) of all trees with d > 7 cm were measured. Height (h) was measured for 25 trees selected within the stand. The top height determined for each stand enabled to classify trees into two layers: higher (group I) or lower (group II) than ⅔ of top height. Trees with d<7 cm were divided into 3 layers according to the height: III – h>2 m (higher upgrowth), IV – h between 0.5 and 2 m (lower upgrowth), and V – h<0.5 m (seedlings). Trees in layer V were counted on a 0.005 ha plot, while trees in layers IV and III on a 0.04 ha plot. The selected fir stands revealed high diversity in basic characteristics (tab. 1 and 2). The number of trees in layer III was higher than in layer II only in one stand, and was larger than the number of trees in layer I. Moreover, the variation in tree height formed a vertical canopy closure. The stand was considered to be a model one, and used to develop diameter distribution according to the BDq method. Most stands characterized a smaller number of trees in lower and larger in higher diameter classes compared to the model distribution. It seems that large number of thick trees prevent satisfactory growth of thinner trees. Fir stands proved to have a mosaic vertical structure. In some fragments, eight classes can be distinguished including one layer only: 1) upper (I), 2) middle (II), 3) upgrowth (III), combination of layers: 4) I and II, 5) I and III, 6) II and III, 7) I, II and III, and 8) gaps. The multi−layer structure of fir stands can be maintained only in the form of such a mosaic, but single−layer fragments are also needed to enhance the natural regeneration. We could select a stand with a close−to−optimal multilayer structure, which was considered as a model one and its diameter distribution was used in the BDq method. A comparison of the model curve with the empirical distribution of diameters at breast height for the stand under consideration allows determining diameter classes with an excess of trees that can be harvested without the fear of losing the multilayer structure of the stand. Whether a given tree has to be cut should depend on the vertical differentiation of trees in a particular fragment of the stand. In further studies, measurements in multilayer fir stands should be conducted to verify the model distribution.
Źródło:
Sylwan; 2015, 159, 09; 722-731
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tempo wzrostu wysokości i pierśnicy jodły pospolitej (Abies alba Mill.) w Beskidzie Niskim
Height and diameter growth rates of silver fir (Abies alba Mill.) growing in Beskid Niski mountains
Autorzy:
Bruchwald, A.
Dmyterko, E.
Niemczyk, M.
Łukaszewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/989756.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
jodla pospolita
Abies alba
wzrost roslin
wysokosc drzew
piersnice drzew
przyrost piersnicy
przyrost wysokosci
tempo wzrostu
Beskid Niski
height growth rate
diameter growth rate
spatial diversity of canopy layers
physical age
abies alba
Opis:
Silver fir is one of the main tree species of mountain and foothill forests in Poland that in optimal conditions forms pure stands with multi−layer structure. The study objective is to present differences in height and diameter growth rates of firs growing in upper stand layers and in the undergrowth. The research was conducted in 12 fir stands located in the Beskid Niski Mts. (southern Poland). In each stand height and diameter at breast height (dbh) were measured for 25 fir trees in order to develop a height curve. The first canopy layer included trees that were higher than ⅔ Hmax established from the height curve of the tree with the largest dbh. Height and diameter were measured on eight trees selected from the first canopy layer. An increment core was extracted at breast height in order to estimate the tree age. From the third canopy layer, which included trees higher than 2 m with dbh below 7 cm, five trees were selected. After cutting those trees, the length of the last ten branch whorls was measured. Five−year ring width measurements starting from the bark towards the pith were done at the stem cross−sections obtained at breast height. The number of rings was counted on remaining stumps. Height growth rate was defined as the height at the base age of 100 years (eq. 1). For the first canopy layer, the height growth rate was on average 31.8 m, while for the undergrowth it was 12.1 m. There was also large difference between diameter growth rate of the first stand canopy layer (55.7 cm) and undergrowth (18.3 cm). Both differences were significant at p=0.05. These discrepancies could result from low amount of light reaching the forest floor. The correlation between height and diameter growth rates and undergrowth tree age was negative in both cases. Long periods of shading result in smaller number of firs reaching the first canopy layer. Assuming that uneven−aged stand structure is optimal for that species, it should be characterized by a spatial variability (mosaic) of various canopy layers including even−aged patches with sparse canopy closure as well as gaps where fir regeneration will be initiated having favorable growth conditions.
Źródło:
Sylwan; 2015, 159, 10; 804-812
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wzorzec rozkładu pierśnic drzew wielowarstwowego drzewostanu jodłowego Gór Świętokrzyskich
Pattern of breast height diameter distribution in a multilayer silver fir stand in the Swietokrzyskie Mountains
Autorzy:
Bruchwald, A.
Dmyterko, E.
Łukaszewicz, J.
Niemczyk, M.
Wrzesiński, P.
Powiązania:
https://bibliotekanauki.pl/articles/989331.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Gory Swietokrzyskie
drzewostany jodlowe
jodla pospolita
Abies alba
rozklad piersnic
metoda BDq
diameter distribution
abies alba
bdq method
Opis:
In Poland, the majority of silver fir stands is characterised by a single−layer stand structure. The current silvicultural activities aim at obtaining multilayer stands, which requires a clearer definition of the structure, and more precisely, a better knowledge of the pattern of diameters at breast height (DBH) distribution. The aim of the research was to develop a pattern of DBH distribution of trees in a multilayer silver fir stand in the Świętokrzyskie Mountains (central Poland) using the BDq method, through the mathematical determination of function parameters, including the productive capacity of the habitat. The application of this pattern will allow the selection of the management methods aimed to obtain and then maintain model stands with a different layer structure. The research was based on the empirical material collected in 56 stands that were characterized by both a single− and a multi−layered structure. They grew in coniferous forest habitats, mostly in the upland mixed coniferous forest, upland mixed deciduous forest and upland deciduous forest or mountain forest. One big (up to 1 ha) or 3−5 smaller (0.04 ha) sample plots were established in each stand in which diameters at breast height of all trees and heights of usually 25 trees, selected from the entire range of diameters, were measured. These were used to determine the height growth curve equation coefficients and then the height of each tree. For each stand the basal area was calculated and a graph for DBH distribution was prepared. Site index was established using the original empirical equation. In order to develop a model for multilayer fir stands, individual parameters of the equation 5, such as the basal area (B), the target diameter at breast height (D) and the coefficient q were to be determined using the BDq method. Taking into consideration only stands with one−tailed DBH, individual parameters of the function were found to be associated with site index. Empirical equations were developed for the determination of B and D, and, based on the DBH distribution graphs, coefficient q associated with site index was also calculated (tab.). The developed DBH distribution pattern is a mathematical description of the target fir stand. When the value of stand parameters approaches those of the model stand, it should be managed using the shelterwood cutting system, which results from the spatial variation in the stand height structure, and consequently from the need for different silvicultural treatments in different stand fragments.
Źródło:
Sylwan; 2016, 160, 09; 741-750
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Podstawy planowania składu gatunkowego w lasach górskich na przykładzie Beskidu Niskiego
Basis of the species composition planning model for mountain forests on the example of Beskid Niski Mts.
Autorzy:
Bruchwald, A.
Dmyterko, E.
Mionskowski, M.
Niemczyk, M.
Łukaszewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/972988.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
hodowla lasu
planowanie
czynniki siedliska
typy siedliskowe lasu
leśnictwo
tereny górskie
lasy górskie
skład gatunkowy
wysokość nad poziomem morza
rzeźba terenu
species composition
habitats
landforms
mountain forests
Opis:
The study presents a method of planning species composition of forest stands in mountain areas on the example of Beskid Niski Mts. (south−eastern Poland). The focus was on the species composition of forest stands growing in different conditions, taking into account the type of forest habitat and terrain characteristics: altitude, exposition and slope. The research was based on data stored in the Information System of the State Forests. We used modified growth model for data processing and calculation of site index for the forests older than 60 years. The Beskid Niski Mts. are covered mostly by European beech (33.8%), silver fir (28.3%) and Scots pine (18.9%). Taking into account exclusively the productive capacity of individual forest stands, fir and spruce would be the most desirable species in analysed region. The Beskid Niski Mts. are characterized by a very small diversity of the habitat with domination of mountain fresh deciduous forest (LGśw, 92.1% of the area). We divided analysed region into four altitudinal zones that vary greatly in fraction of afforested area. Beech dominates in all zones and its share increases from the foothills to montane zone (fig. 5). Basing on a digital terrain model, the areal share of 10 landforms was determined for each stand and altitudinal zone (fig. 8). This enabled more detailed planning of species composition. However, it required the adoption of six specific assumptions including the need to maintain a suitable proportion of all tree species growing in the mountains, specifically the main forest tree species: spruce, fir and beech. The 5−stage project (preliminary, historical, current, planning, verification stages) consisting of planning species composition uses, in stage 4, detailed information on landforms. The project assumes that the fragments of forests where trees are expected to grow fast will be earmarked for endangered species. The model sees the need of planting the weaker tree species to be present in the forest ecosystems of the Beskid Niski. The proposed project will enable foresters−practitioners to plan the forest species composition for each of the forest districts in the Beskid Niski quickly. Such a programme might also be an integral part of the growth model of forests useful for forecasting and increasing timber resources.
Źródło:
Sylwan; 2016, 160, 03; 219-229
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dokładność Numerycznego Modelu Terenu tworzonego w oparciu o satelitarny pomiar GPS
Accuracy of the Digital Terrain Model developed on the basis of the GPS satellite measurements
Autorzy:
Niedojadło, Z.
Sopata, P.
Stoch, T.
Kołtyś, W.
Niemczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/164255.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Górnictwa
Tematy:
numeryczny model terenu NMT
metoda GPS-RTK
niecka obniżeniowa
digital terrain model (DTM)
GPS-RTK method
subsidence trough
Opis:
Informacje o przebiegu rzeźby terenu, szczególnie na obszarach podlegających przekształceniom wskutek szeroko pojętej działalności górniczej, umożliwiają przestrzenne monitorowanie procesów i zjawisk związanych z deformacjami powierzchni. W artykule opisano generowanie oraz wynikające z tego procesu dokładności Numerycznego Modelu Terenu, stanowiącego jedną z metod graficznego opracowania pomiaru. Jako dane źródłowe do tworzenia NMT wykorzystano wyniki pomiaru GPS-RTK otrzymane z kilku niezależnych serii obserwacyjnych. Zrealizowano je w odpowiednio dobranym do tego celu testowym obszarze badań, charakteryzującym się zróżnicowaną morfologią i zagospodarowaniem.
Data on land relief, particularly in areas which undergo transformations due to the broadly-defined mining activities, enables the spatial monitoring of processes and phenomena connected with surface deformations. This paper presents the development and accuracy of the Digital Terrain Model (DTM), one of the methods of graphical measurements preparation. The results of GPS-RTK measurements obtained from several independent series of observations were used as the source data for DTM preparation. They were implemented in a carefully selected research area with diverse morphology and land development.
Źródło:
Przegląd Górniczy; 2014, 70, 8; 137-141
0033-216X
Pojawia się w:
Przegląd Górniczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kształtowanie się przyrostu grubości jodeł z Gór Świętokrzyskich
Radial increment of silver fir from the Swietokrzyskie Mts.
Autorzy:
Bruchwald, A
Dmyterko, E.
Bijak, S.
Łukaszewicz, J.
Niemczyk, M.
Wrzesiński, P.
Powiązania:
https://bibliotekanauki.pl/articles/989406.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
sloje przyrostu rocznego
analiza dendrochronologiczna
Gory Swietokrzyskie
drzewostany jodlowe
jodla pospolita
Abies alba
przyrost drzew
przyrost grubosci
przyrosty radialne
czynniki srodowiska
czynniki klimatyczne
zanieczyszczenia przemyslowe
abies alba mill.
tree−rings
increment reduction
increment release
disturbances
Opis:
The paper presents the dendrochronological analysis of silver firs (Abies alba Mill.) growing in the canopy layer of the forest stands. We searched for the similarities in the rhythm of radial growth of studied trees and we analysed the response of these stands to the increment disturbances related to the occurrence of adverse climatic factors and the pressure from industrial pollution. The research material was collected in 30 pure and uneven−aged silver fir stands located in the Świetokrzyskie Mountains (central Poland). We investigated the effect of age of the stands and the conditions for their growth (location, forest habitat type) on an average tree−ring width. In order to detect similarities in the rhythm of radial growth of the surveyed stands, we grouped the raw chronologies by the means of the cluster analysis, using Ward's agglomeration procedure with 1−r distance (r – Pearson correlation coefficient). We assessed the incremental response of the investigated stands to the disturbances (situations of significantly reduced radial growth) using indicators of resistance, recovery and resilience proposed by Lloret et al. [2011]. We also studied the influence of the stand age and the forest habitat type on the response of analysed for stands to the detected disturbances. The shortest chronology consisted of 94 tree−rings, while the longest one of 137. Average length of the obtained silver fir chronologies was 119 years. Older fir stands characterised with narrower rings (r=–0.451, p=0.012). Neither the location, nor the forest habitat type are the factors determining the similarity of the rhythm of radial growth of silver firs from the Świętokrzyskie Mountains (p=0.243 and p=0.967 respectively). The extreme climatic conditions responsible for the majority of the short−term (one−year−long) incremental depressions are the factor of regional importance, which affects the growth of investigated trees. Older stands characterized with better possibilities of increment recovery after the disturbance than younger stands (p<0.001), which may be a result of the production of secondary crowns. No consistent differences in the indices of resistance and resilience were found among analysed stands.
Źródło:
Sylwan; 2016, 160, 11; 893-904
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problemy wsi i rolnictwa: potrzeba zmiany paradygmatu i działań rozwojowych z uwzględnieniem gospodarstw mniejszych obszarowo®
Countryside and agriculture problems: the need for changing the paradigm and development activities in regards to small-area farms®
Autorzy:
Gruchelski, M.
Niemczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/950388.pdf
Data publikacji:
2018
Wydawca:
Wyższa Szkoła Menedżerska w Warszawie
Tematy:
rozwój zrównoważony
zarządzanie
gospodarstwa mniejsze obszarowo
sustainable development
management
smallarea farms
Opis:
Rozwój polskiego rolnictwa i wsi, po wejściu do UE, należy ocenić pozytywnie, jednakże, widocznych jest wiele negatywnych aspektów polskiej polityki rolnej, których efektem są niekorzystne zjawiska widoczne na polskiej wsi i w rolnictwie oraz w ich ekologicznym otoczeniu, do których zaliczyć należy: względnie duże bezrobocie, ubóstwo i patologie społeczne. Remedium na te negatywne zjawiska powinna być kompleksowa i egalitarna polityka rolna (podmiotowo traktująca wszystkie gospodarstwa rolne) wspierana aktywną polityką państwa w zakresie rozwoju przetwórstwa żywnościowego i produkcji pozarolniczej. Takie podejście byłoby zgodne z wdrażanym w całej gospodarce paradygmatem rozwoju zrównoważonego, jak również, pozwoliłoby na odpowiedni rozwój polskiego rolnictwa i wsi oraz ich otoczenia ekologicznego, a także, na zwiększenie bezpieczeństwa żywnościowego kraju (food security).
The development of Polish agriculture and the countryside, after joining the EU, should be assessed positively. However, there are many negative aspects of Polish agricultural policy, which results in many unfavorable phenomena visible in the Polish rural areas and agriculture, and in their ecological environment, which include: relatively high unemployment, poverty and social pathologies. The remedy for these negative phenomena should be a comprehensive and egalitarian agricultural policy (subjectively treating all farms) supported by active state policy in the scope of development of food processing and non-agricultural production. Such an approach would be consistent with the paradigm of sustainable development implemented in the entire economy, as well as it would allow for the proper development of Polish agriculture and the countryside. their environment and food security.
Źródło:
Postępy Techniki Przetwórstwa Spożywczego; 2018, 1; 109-115
0867-793X
2719-3691
Pojawia się w:
Postępy Techniki Przetwórstwa Spożywczego
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 56

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