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Wyświetlanie 1-7 z 7
Tytuł:
Estimating forest harvesting operations to achieve sustainable rural development in Samarina (Greece)
Autorzy:
Stergiadou, A.
Libello, D.
Cavalli, R.
Krc, J.
Powiązania:
https://bibliotekanauki.pl/articles/38390.pdf
Data publikacji:
2009
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
forest
harvesting operation
harvesting system
forest work
sustainable development
rural development
ecological sustainability
Samarina
Greece
Opis:
Purpose of the work: Mountainous areas, with altitude over 700 m, intense relief and slopes between 16–20%, cover 43% of Greece and they are usually characterized by low population density and long-term unemployment. The Greeks have a dependent connection among environment, economy and society as the history illustrates. Many of Greece’s historic, cultural landscapes and native ecosystems have been degraded or isolated over the years. There is scientific evidence that Greece’s natural/semi-natural forested areas cannot be sustained without watersheds, ridges and other natural corridors that connect its native landscapes and ecosystems. Logging systems are really ancient by using often only mules or horses. The aim of the work is to estimate how harvesting systems should be technologically upgraded improving forest work and social wellness maintaining at the same time ecological sustainability. Approach: The study area is held at Samarina region, a mountainous area of Northern Pindos in Greece. Social data were collected with questionnaires and local visits for better understanding of human resources for forest authorities and other administrative information’s. DTM, Forest Inventory data and other GIS data have been derived by paper maps and previous studies. A registration of road-net and human resources within the protected area of Valia Kyrna and their contribution as factors for the sustainable development was used.The development of a Spatial Decision Support System that can concern all the conditions that are need in order to make an estimation of the optimal way of harvest a stand is really a challenge. Expected results: A GIS program is a powerful decision support tool in order to give the opportunity to the offices of Forestry to choose the optimal way of harvesting a stand and also to realize visually the effect’s of such a kind of work; that is going to be held to the inhabitants and to the tourists of the area. Conclusion: The potential of social and ecological factors is examined as it concerns the promotion of the protected area within sustainable rural development. Advantages of registration in the form of a spatial tool, especially when many types of information participate, are presented.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2009, 51, 1
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pracochłonność prac leśnych w wybranych typach siedlisk w górach
Labour intensity of forest work in selected habitat types in the mountains
Autorzy:
Molendowski, F.
Powiązania:
https://bibliotekanauki.pl/articles/292247.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
prace leśne
pracochłonność
góry
siedlisko
nakłady pracy
mountain
forest
labour intensity
forest work
biotopic type
Opis:
W pracy przedstawiono wyniki badań wpływu typu siedliskowego lasu w górach na nakłady pracy zagospodarowania i użytkowania lasu. Nakłady pracy zagospodarowania i użytkowania lasu charakteryzują się dużym zróżnicowaniem ich wielkości w zależności od typu siedliska w górach. Najmniejsze nakłady pracy występują na siedlisku najuboższym Bór Wysokogórski i wynoszą odpowiednio na hodowlę 481 rbhźha-1, ochronę 291 rbhźha-1 oraz użytkowanie 911 rbhźha-1 i wzrastają w miarę polepszania się typu siedliskowego lasu i najwyższe występują na siedlisku Las Górski i wynoszą odpowiednio 1031 rbhźha-1, 341 rbhźha-1 i 2877 rbhźha-1.
The paper presents results of the research concerning the impact of mountain forest biotopic type on the amount of labour for forest management and use. The amount of labour for forest management and use is highly diversified depending on the type of habitat in the mountains. Lowest amount of labour has been observed in the poorest habitat of Bór Wysokogórski, reaching respectively: 481 man-hoursźha-1 for breeding, 291 man-hoursźha-1 for protection, and 911 man-hoursźha-1 for use. These values tend to grow with improving forest biotopic type, and they are highest in the habitat of Las Górski, reaching respectively: 1031 man-hoursźha-1, 341 man-hoursźha-1 and 2877 man-hoursźha-1.
Źródło:
Inżynieria Rolnicza; 2008, R. 12, nr 5(103), 5(103); 137-143
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soil enzymatic activity in deteriorated forest ecosystems in the operation area of the Pulawy S.A. Nitrogen Factory
Autorzy:
Bielinska, E J
Domzal, H.
Powiązania:
https://bibliotekanauki.pl/articles/1450115.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
Pulawy Forest Inspectorate
forest ecosystem
nitrogen work
enzyme activity
biological property
forest soil
Zyrzyn commune
biochemical property
soil
Pulawy Nitrogen Factory
operation area
forest habitat
soil property
degraded ecosystem
anthropogenic ecosystem
environmental deterioration
Opis:
The present research (1998-1999) was carried out to evaluate soil enzymatic activity in the deteriorated forest ecosystems within the operation range of the Puławy S.A. Nitrogen Factory. Investigation covered podzolic soils from strong and medium forest pollution zones. Objects from the Pulawy Forest Inspectoratejwere represented, i.e. samples from the Puławy district (Inspectorate Wronów) and Żyrzyn district (Inspectorate Zagórki). The obtained results indicate high degree of soil environment deterioration in the investigated forest habitats, in the form suppressed enzymatic activity and deformation of chemical properties. A significant increase in the enzymatic soil activity with the increasing distance from the nitrogen factory was observed. Changes in the activity of soil enzymes were related to the soil chemical properties.
Źródło:
Acta Agrophysica; 2001, 51; 7-13
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura rocznego czasu pracy leśniczych
The structure of foresters annual work-time
Autorzy:
Kocel, J.
Powiązania:
https://bibliotekanauki.pl/articles/1016323.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
struktura czasu pracy
stanowisko lesniczego
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
lesnictwo
state forests national forest holding
foresters
foresters' work−time structure
annual work−time
Opis:
The structure of the annual work−time of the staff from all kinds of forest sub−districts in the State Forests National Forest Holding (SF), the structure of the average annual work−time of the staff running exclusively the SF forest sub−districts and the structure of the average, annual work−time of the staff from the SF forest sub−districts supervising the forests that are not the property of the State Treasury were studied on the basis of questionnaire surveys conducted in 2004. The studies showed that the staff from all kinds of forest sub−districts spent most of their work−time for the harvesting and sale of timber (36.23% of their annual time on average). Silviculture is the second largest time−consuming activity performed by foresters, accounting for 16.47% of their annual work−time, while forest protection accounts for 12.88% and observations of the forest status – 7.55% of forest sub−district staff's annual work−time.
Źródło:
Sylwan; 2007, 151, 01; 3-10
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocenka ehkspluatacionnykh svojjstv kolesnogo trelovechnogo traktora
Exploitation properties valuation of wheel tralling tractor
Autorzy:
Bilyk, B.
Borys, M.
Mokhov, S.
Simanovich, V.
Powiązania:
https://bibliotekanauki.pl/articles/77673.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
transmission
dynamic process
dynamic load
work condition
forest machine
wheel tractor
computer programme
fuel economy
mathematical modelling
Opis:
The analysis of the work conditions of forest tractors and machines at their base, and the impact of these conditions on the performance properties of tractors. Calculated scheme of dynamic model of transmission biaxial wheel tractor and computer program has been developed for the tractor movement simulation and dynamic processes in the transmission that allows you to explore the influence of weight and geometric parameters, engine power and the transmission gear number on its speed properties, coefficients of dynamic and fuel economy. It was presented the results of mathematical modeling of the dispersal from the place and dynamic loadings in the transmission of a wheel tralling machine. The dependences of the dynamics coefficients, of the determination of the fuel’s economy and speed property on gear numbers of the transmission’s aggregates was received. It was substantiated the rational significances of the gear numbers of distribute box of a wood tractor, that will reduce dynamic moments, and therefore increase the work durability of the wheel forest transport machine.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 4
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wydajności wywozu drewna ze zrębu w zależności od rodzaju środka transportu
Performance analysis of export of wood in relation from the kind of transport
Autorzy:
Grieger, A.
Sędłak, P.
Stawicki, T.
Lewaszkiewicz, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/314955.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
transport leśny
maszyny do prac leśnych
Forwarder V890.3
ciągnik leśny
organizacja pracy pojazdu
efektywność pracy maszyn
transportation of forest
forestry machines
forest tractor
vehicle work organization
operating efficiency
Opis:
Zachodzące zmiany w wyposażeniu przedsiębiorstw świadczących usługi leśne wymagają monitorowania zarówno parametrów technicznych, możliwości technologicznych, ale przede wszystkim przebudowy organizacji pracy. Producenci przekazują użytkownikom informacje o nowych rozwiązaniach w bardzo ograniczonym zakresie. Specyfika miejsca pracy maszyny wymaga dodatkowego opisu, który wspomagałby proces zarządzania w pracach leśnych. Przeprowadzone badania wskazują tylko na wycinek problemu, z którym styka się właściciel przedsiębiorstwa w zakresie efektów pracy maszyny. Ustalono, że najbardziej wydajne są maszyny typu forwarder, mniejszym stopniu zestawy ciągnikowe ze specjalistyczną przyczepą oraz skider.
The changes in the equipment of enterprises providing forestry services need to monitor both the technical parameters, technological possibilities, but above all the reconstruction work organization. Manufacturers shall provide users with information about new developments in a very limited extent. The specificity of jobs the machine requires an additional description that the process of assistance to management in forestry work. The study indicates only clipping the problem faced by the owner of the company with respect to the effects of the machine. It was agreed that the most efficient machines are the type forwarder, less specialized kits for tractor with a trailer and a skidder.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 6; 574-577
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane technologiczne i ekonomiczne aspekty balotowania pozostałości pozrębowych
Some technological and economic aspects of logging residues bundling
Autorzy:
Moskalik, T.
Sadowski, J.
Zastocki, D.
Powiązania:
https://bibliotekanauki.pl/articles/989650.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
biomasa lesna
pozostalosci zrebowe
balotowanie odpadow
aspekty technologiczne
aspekty ekonomiczne
produkcja balotow
koszty produkcji
wydajnosc pracy
bundling
slash
forest biomass
renewable energy
work and cost−efficiency
Opis:
As the access to the fossil fuels is limited, renewable energy sources have been especially intensively promoted in recent years, namely biomass. A comparatively large amount of biomass can be obtained from forests. This refers to round wood characterized by low technical quality, small−sized wood, and logging residues. Under Polish conditions, the potential amount of logging residues is estimated at 3−5 Mio. m³ per year, depending on different scenarios of their ulitization. Intense development of technologies for energy acquisition from the forest biomass has provided conditions facilitating the use of logging residues on an industrial scale. One of the possible solutions is bundling. In this process slash is compacted into cylindrical log−like units with diameter of ca. 65−75 cm and length of 2.5−3.0 m. The bundles can be forwarded to the roadside landing with standard forwarders and transported to the terminal or end−user with trucks utilized, first of all, by a round wood hauling. The John Deere slash bundler 1490D was the subject of the study. The basic unit of the bundling device was an eight−wheel forwarder. The study area was located in north−eastern Poland and comprised 10 selected plots. They represent coniferous stands, dominated by Scots pine with various fraction of Norway spruce and scattered birches. The aim of the paper was to estimate the basic technological and economic parameters of the bundling machine, working in clear cuts with two variants of logging residues concentration. In the first variant they were not especially accumulated, evenly distributed over the area. In the other one they were gathered into piles. The structure of a working day, work productivity rates, and the costs were determined. The bundler productivity rate depends largely on the extent the slash is prepared. When it is concentrated in piles, the machine does not have to travel over the entire work area to gather scattered material. In this case, the average productivity was 21.85 bundles/h. In the variant with scattered logging residues, work efficiency equaled 15.19 bundles/h. The hourly cost of the bundler use reached 289.42 PLN. The unit costs were at the level of 52.91 PLN/m³ (variant 1) and 38.54 PLN/m³ (variant 2).
Źródło:
Sylwan; 2016, 160, 01; 31-39
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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