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    Wyświetlanie 1-8 z 8
    Tytuł:
    Właściwości trakcyjne opon na drogach leśnych
    Traction parameters of tyres working on forest roads
    Autorzy:
    Białczyk, W.
    Cudzik, A.
    Czarnecki, J.
    Pieczarka, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/286487.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Inżynierii Rolniczej
    Tematy:
    siła trakcyjna
    sprawność trakcyjna
    opona
    droga leśna
    traction forces
    traction efficiency
    tyre
    forest roads
    Opis:
    Przedstawiono wyniki badań właściwości trakcyjnych opon 4.00-10 i 5.00-10 oraz ich wersji zbliźniakowanych na wybranych glebach leśnych w obrębie drzewostanów sosnowych 28 i 72 letnich oraz drzewostanu liściastego. Analizie poddano maksymalne siły trakcyjne, sprawności trakcyjne oraz współczynniki przyczepności wyznaczone dla badanych opon i dróg przy różnym pionowym obciążeniu opon.
    This paper presents the results of a study on traction forces, efficiency and other parameters in various soil conditions. The field experiments were carried out in forests. The relationships between the types of tyre (two types), values of vertical load (four levels of loading), traction forces and the level of traction efficiency were analysed. Single and double tyres were used in the experiments. The results show that a double tyre can improve the traction parameters, and that each optimal vertical loading for each tyre can be determined for optimal traction parameters.
    Źródło:
    Inżynieria Rolnicza; 2005, R. 9, nr 3, 3; 55-62
    1429-7264
    Pojawia się w:
    Inżynieria Rolnicza
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zawartość makro- i mikroskładników w glebach poboczy dróg śródleśnych w okresie jesiennym
    The content of macro- and microelements in soils of roadsides of forest roads in autumn
    Autorzy:
    Iżewska, A.
    Chudecka, J.
    Tomaszewicz, T.
    Wróbel, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/372610.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    pobocza dróg leśnych
    gleba
    mikroskładniki w glebie
    makroskładniki w glebie
    roadsides of forest roads
    macroelements in soil
    microelements in soil
    Opis:
    Autorzy badali zawartość makro- i mikroskładników rozpuszczalnych w 0,5M HCl w glebach poboczy dróg śródleśnych na Nizinie Szczecińskiej w okresie jesiennym. W obrębie poboczy, o łącznej szerokości 5 m, wyodrębniono 5 stref (A-E) w układzie zwiększającej się odległości od krawędzi jezdni. Celem badań była ocena wpływu środków odladzających na dostępność składników pokarmowych dla roślin. Wyniki wskazały na najwyższą zawartość P, K, Mg, Ca, Na, Cu, Fe, Mn w glebach najbliższych jezdni (strefa A). Istotne różnice w zawartości pierwiastków stwierdzono pomiędzy glebami strefy A oraz C (P, K, Mg, Cu), strefy D (Na, Fe), a nawet strefy E (Mn). Dominowała niska i bardzo niska zasobność gleb w badane pierwiastki. Wysoka zasobność w K i Cu wystąpiła w glebach strefy A, a średnia - w Cu w strefie B. Zawartość Zn nie wykazała istotnych różnic, odpowiadając zasobności wysokiej.
    The authors investigated the content of macro-and microelements soluble in 0.5 M HCl in soils of roadsides of forest roads on Szczecin Lowland in autumn. Within the roadsides, with a total width of 5 m, separated five zones (A-E) in the system of increasing distances from the edge of roads. The aim of study was to assess the impact of snow removal on the availability of nu-trients for plants. The results indicated the highest content of P, K, Mg, Ca, Na, Cu, Fe, Mn in the soils lying nearest the roads (zone A). The significant differences in content of elements were found between the soils zones A and C (P, K, Mg, Cu), zone D (Na, Fe), and even zone E (Mn). The low and very low abundances of soils in investigated elements were dominant. The high abundance of K and Cu occurred in the soils of zone A, but the medium abundance of Cu in zone B. The Zn contents shown no significant differences responding to high abundance.
    Źródło:
    Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski; 2011, 143 (23); 44-50
    1895-7323
    Pojawia się w:
    Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przestrzenny rozkład wilgotności gruntu w obszarze przyległym do wylotu urządzeń odwadniających drogi leśne
    Spatial distribution of soil moisture in the area adjacent to the outlet of forest roads drainage devices
    Autorzy:
    Gołąb, J.
    Badach, E.
    Słowik-Opoka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/989490.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    inzynieria lesna
    drogi lesne
    urzadzenia odwadniajace
    stoki
    wilgotnosc gruntu
    rozklad wilgotnosci
    rozklad przestrzenny
    osuwiska
    mountain forests
    forest roads
    drainage devices
    landslides
    soil moisture
    Opis:
    Transformation of the natural environment of human life may have different speed, depending on the number of conditions, especially the climate. There is a long−term transformation, but also the sudden changes, often having for humans the nature of disaster. An example of sudden and undesirable changes in the environment are observed in form of movements of soil on the slopes of the mountain. One of the environmental factors that determine the slope stability is the current soil moisture. Its sudden increase caused by heavy rain or spring thaw can significantly change soil physical conditions and triger landslides. Water saturation may also occur in soils of these areas, to which water from the road drainage devices flows. The aim of the study is to determine the spatial distribution of soil moisture in the outlet of the drainage facilities for forest roads in the context of changes in selected soil characteristics affecting the possibility of landslides. We selected two culverts and two open top culverts that drain the forest road in Gorce National Park. The most important for the observations was to determine the spatial distribution of soil moisture and soil moisture differences in selected locations of an outlet of the road drainage facilities in relation to the place of outlet and the unit drain line. In the analysis of measurement results, there was no significant difference between the average humidity clustered according to ‘position' and by the ‘line'. The significance of this was obtained for the average moisture grouped according to ‘depth'. This can be explained by the impermeability of land and a large decrease in the slopes in the area of research. In general, rather small soil moisture fluctuations, despite the variability of rainfall, in conjunction with significant fraction of skeleton particles, do not create conditions conducive to the formation of landslides.
    Źródło:
    Sylwan; 2016, 160, 10; 861-870
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Droga jako czynnik odkształcający fitocenozy leśne
    Autorzy:
    Andres, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1022582.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drogi
    antropopresja
    lasy
    lesnictwo
    przeksztalcenia srodowiska
    vegetation of forest trails and roads
    anthropopressure
    Opis:
    Vegetation of forest roads and tourist trails on which specific carpet vegetation grow is an example of extreme changes taking place under the impact of anthropopressure. Analysis of changes in the plants growing close to forest roads and paths may contribute to the identification of the main trends in the process of transformation of vegetable cover subject to trampling. It also may be the basis for determination of the degree of resistance of forest communities to tourist pressure and the possibilities and time of their regeneration after it has ceased. Regeneration capability of the vegetation destroyed by trampling after the disturbances have ceased is one of the indicators of its resistance to pressure.
    Źródło:
    Sylwan; 2005, 149, 05; 65-70
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Funkcjonalność połączeń dróg leśnych z drogami publicznymi i innymi drogami wewnętrznymi
    Functionality of the connections of forest roads with public and other internal roads
    Autorzy:
    Trzciński, G.
    Młynarczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/979571.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    nadlesnictwa
    uklad komunikacyjny
    drogi lesne
    drogi publiczne
    drogi wewnetrzne
    polaczenia drog
    funkcjonalnosc
    public roads
    forest area
    internal road
    roads exit
    roads junction
    Opis:
    The forestry communication system is included in larger transport areas through forest roads connections mainly with public roads, but also with internal ones. The possibility of realization of these connections and defining their technical parameters is very important, as it concerns the cooperation of various property owners as well as interference of the State Forest units into other land (road lane). The aim of the research was to analyse the exits, i.e. connections of forest roads with public or other internal roads, necessary to ensure the functioning of the communication system of the forest district. We investigated existing as well as the planned to be built exits. The research was carried out based on the developed information sheet regarding the scale and scope of issues related to the operation of the exits. We received back 412 information sheets and analysed the data according to the category of the road and the regional directorates of the State Forests (RDSFs). The total number of functioning exits the State Forests equals 108,239. The exits number varies from 2505 in RDSF Piła to 12,341 in RDSF Olsztyn and depends on the number of forest districts and their area, which is confirmed by the high number of exits in RDSF Bialystok, Szczecin and Wroclaw (tab. 1). The highest number of exits (53,455) was found for junctions with commune roads, and then district roads (31,190). A large number of exits (8111) was recorded for roads that do not have the status of a public road. More than a half of the surveyed forest districts (262) demonstrated the need to build 9072 new exits from various road categories, indicating primarily exits from communal roads and district roads (tab. 2). No need of building the exits to national roads was exhibited by 320 forest districts, and by 253 units for regional, 183 for district and 211 for communal roads.
    Źródło:
    Sylwan; 2019, 163, 10; 862-871
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ szlaków zrywkowych założonych w czasie czyszczeń późnych na kształtowanie się niektórych cech drzew
    The effect of strip roads established during late cleanings on the selected parameters of trees
    Autorzy:
    Giefing, D.F.
    Karaszewski, Z.
    Ziemski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1026334.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    szlaki zrywkowe
    oddzialywanie na rosliny
    lasy
    uzytkowanie lasu
    czyszczenia pozne
    lesnictwo
    zabiegi pielegnacyjne
    strip roads
    forest environment
    timber harvesting
    timber extraction
    Opis:
    Different opinions concerning strip roads indicate the need to recognise the consequences of their establishment for the environment. The hypothesis has been put forward that the strip width exerts diverse effects on the neighbouring stands. The effect of strip roads on the selected parameters of trees and forest floor vegetation has been assessed.
    Źródło:
    Sylwan; 2003, 147, 03; 11-18
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany powierzchni leśnych będących w zarządzie Lasów Państwowych wynikające z rozwoju infrastruktury dróg publicznych
    Changes in the forest area under the management of the State Forests resulting from the development of public road infrastructure
    Autorzy:
    Trzciński, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/985822.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Panstwowe Gospodarstwo Lesne Lasy Panstwowe
    lasy panstwowe
    zmiany powierzchniowe
    infrastruktura drogowa
    drogi publiczne
    rozwoj infrastruktury
    public roads
    land management and planning
    forest land
    Opis:
    The economic development of the country is very much dependent on the development of the transport infrastructure, which is one of the main priorities of the state policy included in the planning and development documents. Ensuring a efficiently functioning transport system, primarily the network of roads, involves the need to improve the technical characteristics of existing roads or to build new sections. With the linear nature of road investments, we deal with interference in significant areas that have direct and indirect effects. The aim of the study was to analyze the impact of investments realized for different categories of public roads on the area of land needed to be excluded from forest production. The structure and area of the land as well as the number of forest superintendents transferred areas were also analyzed. The study was conducted for forest areas managed by the State Forests National Forest Holding (SF NFH). Data on the area of the transferred forest land was obtained from SF NFH units and the General Directorate of National Roads and Motorways (GDDKiA). In the years 2012−2015, SF NFH units transferred the land into the management of GDDKiA 203 times with the total area of 617 ha. In the same period, the transfer of the land ownership to local government for voivodship, county and municipal roads took place in 388 cases and covered 556.6 ha. Since 2003 (i.e when special act on road investments came into force), the area of the transferred land amounted to 282.7 ha in Toruń, 78.6 ha in Gdańsk and 558.4 ha in Poznań regional directorates of the State Forests. There was a decrease in the area of the transferred lands depending on the category of public roads, while the highest number of events for municipal roads was observed. There is a great variability in the time, number and area of property transferred to public roads.
    Źródło:
    Sylwan; 2018, 162, 02; 110-117
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ efektu brzegowego drogi na cechy drzewostanów sosnowych Puszczy Noteckiej
    Edge-effect of the road on the Scots pine stands characteristics in the Notecka Forest
    Autorzy:
    Grajewski, S.M.
    Mizera, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/989417.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Notecka
    drogi publiczne
    drogi o malym natezeniu ruchu
    oddzialywanie na srodowisko
    efekt brzegowy
    drzewostany sosnowe
    cechy taksacyjne
    zasobnosc drzewostanu
    miazszosc drzew
    road−edge effect
    diameter at breast height
    growing stock
    forest stand value
    very low−volume roads
    Opis:
    The development of the transportation network brings both benefits and threats. Much attention is paid to soil contamination with trace elements, difficulties in animal migration, noise propagation or synanthropisation of the vegetation cover. This paper deals with the effect of provincial road No. 150 on inventory characteristics of neighboring Scots pine stands in the Notecka Forest (western Poland) – one of the larger forest complexes in Europe. Twelve rectangular experimental sites were established perpendicular to the road axis, called belt transects. Each transect consisted of 3−4 plots located at different distances from the pavement edge (fig.). Measurements and estimations were recorded for the plots. Values from all belt transects were approximated within plots at the same distance from the road and then compared using statistical methods. Observations were conducted in Scots pine stands growing on fresh coniferous forest (Bśw) and fresh mixed coniferous forest (BMśw) sites. Reduced stand density that resulted in decreased basal area, volume and growth rates were observed in the immediate vicinity of the road compared to the forest interior. Individual trees were thicker, but more often burdened with defects decreasing timber value. Any considerable effect of the road on tree height wasn't observed. The above mentioned changes were more evident in poorer habitat conditions, while the location in relation to the road had no significant effect. Modified lighting conditions are probably the main cause of these changes. At the edge of Scots pine stands in the Notecka Forest, a unique ecotone has formed under the influence of the provincial road.
    Źródło:
    Sylwan; 2016, 160, 11; 915-922
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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