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Tytuł:
Luminescence dating of the Volochysk section : a key Podolian loess site (Ukraine)
Autorzy:
Fedorowicz, S.
Łanczont, M.
Mroczek, P.
Bogucki, A.
Standzikowski, K.
Moska, P.
Kusiak, J.
Bluszcz, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060446.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
loess-palaeosol sequence
luminescence dating
quartz
polymineral fractions
Podolia
Opis:
The Volochysk site belongs to important and unique loess sites in the Podolia Upland (W Ukraine) because it contains relatively well-developed loess deposits representing the last and penultimate glacial cycles. This loess-palaeosol sequence consists of pedocomplex S1 (MIS 5) developed on loess L2, and loess L1 (MIS 4-2) with the palaeosols of lower, interstadial rank. In this sequence, different periglacial structures were found, including the largest ones of ice-wedge cast type. Different quartz and polymineral fractions separated from the samples collected in the Volochysk site were dated using luminescence methods (SAR OSL, post-IR IRSL and TL) in three Polish luminescence laboratories in Gdańsk, Gliwice and Lublin. In total, 69 luminescence dating results were obtained for 18 samples. The methodological and research aims were to carry out mutual verification of the obtained dating results as well as to analyse and interpret the differences between them, and to determine the age of distinguished deposit layers and the period of cryogenic activities. The luminescence dates of the sediments, which were deposited during MIS 2, 3 and 4, corresponded fairly well to the ages attributed to these stages. They also indicate the age of periglacial phenomena. However, the TL dates were generally older than the OSL ones, especially those obtained for the sediments deposited during MIS 5 and 6. The results of the research of the Volochysk sequence were compared with those obtained in past years for the loess deposits of the Volhynian Upland (north of Podolia) during similar inter-laboratory analyses conducted to determine their age. The results of OSL datings of the older deposits (MIS 5 and MIS 6) are underestimated irrespective of the used method, and the type (quartz, polymineral) and size of grains. Numerous attempts were made to explain this phenomenon, which, however, give no answer. It was only found that this underestimation corresponded to the equivalent dose value of ~150 Gy.
Źródło:
Geological Quarterly; 2018, 62, 3; 729--744
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of specialized training on the quality of hotel customers service
Wplyw specjalistycznych szkolen na jakosc obsługi klientow hotelowych
Autorzy:
Wojciechowska-Solis, J.
Mazurek-Kusiak, A.
Soroka, A.
Powiązania:
https://bibliotekanauki.pl/articles/37808.pdf
Data publikacji:
2016
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Acta Scientiarum Polonorum. Oeconomia; 2016, 15, 2
1644-0757
Pojawia się w:
Acta Scientiarum Polonorum. Oeconomia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Znaczenie środowiska leśnego w rozwoju psychofizycznym polskiej młodzieży szkolnej
Importance of the forest environment on the psychophysical development of Polish pupils
Autorzy:
Mazurek-Kusiak, A.
Soroka, A.
Wojciechowska-Solis, J.
Powiązania:
https://bibliotekanauki.pl/articles/989524.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
mlodziez szkolna
rozwoj psychofizyczny
lasy
znaczenie
badania ankietowe
motywy pobytu
cele edukacyjne
rekreacja fizyczna
wypoczynek
zbieranie runa lesnego
importance of forests
forest resources
physical and mental development
youngsters
Opis:
Forest areas are treated as one of the most important resources for a modern human, which is an integral part of his existence. The aim of this study was to determine a degree of the influence that forest environment has on the psychological and physical development of Polish teenagers as well as to recognize the motives having the greatest impact on the need of school youth to stay in the forest environment. We also tried to define skills and values acquired by young people through the use of forest areas. We used a diagnostic survey method. Authors' questionnaire was applied to survey 3,590 respondents all over Poland. The study was conducted in May and June 2014. Altogether we surveyed 1,206 high school students, 1,186 junior high students and 1,198 pupils from the elementary schools. The discriminant function was applied for statistical analyzes. The main motives for young people to stay in the forest environment were resting, gathering undergrowth, physical recreation as well as education on the economy and protection of forest resources (tab. 1). The co−participants of young people were mostly parents, to a lesser extent, tourist guides, foresters and educators dealing with forestry issues. Young people often organized trips to the forest areas on their own (tab. 2). Teenagers treat the forest as a place of physical and mental regeneration, a place of active resting by practicing such forms of recreational activities as walking, jogging, nordic walking, cycling and, to a lesser extent, horse riding and skiing (tab. 5). They also strongly emphasized the possibility to gather undergrowth in the forest areas. The forest resources are an important place for practicing physical recreation, relaxation and regeneration of psychophysical forces of Polish schoolchildren (tab. 4). The forest environment gives young people the opportunity to relax, restore emotional balance and to enjoy their stay in the bosom of nature. The forest environment influences the acquisition and improvement of many skills related to healthy lifestyle as well as cognitive elements associated with forest management and the function of forest (tab. 3). Despite the significant role of forest services in educational activities, the main responsibility of preparing children and young people to skillful use of forest resources rests on foresters and educators related to the forest environment.
Źródło:
Sylwan; 2016, 160, 07; 609-616
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Znaczenie zasobów leśnych w turystyce zdrowotnej na przykładzie Wigierskiego Parku Narodowego
Importance of forest resources in health tourism - Wigierski National Park case study
Autorzy:
Soroka, A.
Mazurek-Kusiak, A.
Wojciechowska-Solis, J.
Hawlena, J.
Powiązania:
https://bibliotekanauki.pl/articles/989679.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
turystyka zdrowotna
lasy
rekreacja
zasoby lesne
Wigierski Park Narodowy
wykorzystanie
badania ankietowe
forest environment
tourism
recreation
health
society
Opis:
The aim of this study was to identify the motives of visits in the Wigierski National Park (north−eastern Poland), which were focused on health and regeneration of vitality by inhabitants of Suwałki. Knowledge about the influence of forest environment on health was also investigated. The quota sampling was used to determine the sample size and number of respondents was determined proportionally to the level of education and age of people surveyed. We used discriminant analysis to determine which variables stood out in four analysed age groups. Recreational and tourism as well as therapeutic opportunities, to a great extent, are not just noticed by respondents, but also applied by them in their daily life. Respondents appreciated the healing effect of the forest environment on people, on their physical and mental needs. Such attitude was achieved thanks to widely conducted education, which enhanced such aspects as medical properties of forests and their role in health prevention. Respondents declared the need for visiting actively forest areas for leisure and health reasons. Respondents particularly emphasized a possibility of health improvement, even more than a desire to enjoy anthropogenic attractions of the Wigierski National Park. Taking into account tourists' needs that are aimed at leisure and health, as well as appreciating non−productive importance of forests, it is recommended that the State Forests, through supervision and adequate infrastructure, should strive for the most convenient way to make forest environment available for people. It was also applied for protecting forest resources in order to maintain their sustainability for present and future generations. It was stated that the promotion of active leisure in connection with natural forest environment is a new way of life, especially applied by residents of large urban agglomerations. Such promotion is also a key task of public authorities and various organizations related to ecology and health. A special role is attributed to tourism and recreation organizers, but most of all to the State Forests, which are the main administrator of this forest area.
Źródło:
Sylwan; 2016, 160, 01; 64-70
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Numerical and Physical Simulation to Design of the Best Manufacturing Technology for Fasteners
Zastosowanie numerycznej i fizycznej symulacji do projektowania najlepszej technologii wytwarzania elementów złącznych
Autorzy:
Kusiak, J.
Skóra, M.
Rauch, Ł.
Szeliga, D.
Pietrzyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/352669.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
forging
fasteners
optimization
kucie
łączniki
optymalizacja
Opis:
The development of the best manufacturing technology for fasteners was the subject of this work. Physical and numerical simulations were used to evaluate various technological variants. Possibility of application of new generation bainitic steels was considered, as well. Improvement of exploitation properties was the objective of the optimization having in mind tool wear and manufacturing costs as constraints. Several fasteners were investigated but results for three parts, including Allen screw, screw anchors used to carry concrete plates are presented as a case study. Industrial trials were performed and confirmed correctness of the designed manufacturing technology.
Przedmiotem pracy była metodyka projektowania najlepszej technologii wytwarzania elementów złącznych. Różne warianty technologiczne były przedmiotem symulacji fizycznych i numerycznych. Rozważono również możliwość zastosowania nowych materiałów w postaci stali bainitycznych. Celem optymalizacji była poprawa własności eksploatacyjnych wyrobów natomiast zużycie narzędzi i koszty wytwarzania wprowadzono jako ograniczenia. Rozważono cały szereg elementów złącznych ale w pracy zamieszczono wyniki dla trzech wyrobów, a mianowicie śruby imbusowej, kotwy do betonu oraz niestandardowej śruby z kwadratową główką. Wykonane próby przemysłowe potwierdziły prawidłowość zaproponowanych technologii wytwarzania tych elementów.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 1; 455-460
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
NOx photocatalytic degradation on gypsum plates modified by TiO2-N,C photocatalysts
Autorzy:
Janus, M.
Bubacz, K.
Zatorska, J.
Kusiak-Nejman, E.
Czyżewski, A.
Morawski, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/779427.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
photocatalysis
modified gypsum
NOx
Opis:
In presented studies the photocatalytic decomposition of NOx on gypsum plates modified by TiO2-N,Cphotocatalysts were presented. The gypsum plates were obtained by addition of 10 or 20 wt.% of different types of titanium dioxide, such as: pure TiO2 and carbon and nitrogen co-modified TiO2 (TiO2-N,C) to gypsum. TiO2-N,C photocatalysts were obtained by heating up the starting TiO2 (Grupa Azoty Zakłady Chemiczne Police S.A) in the atmosphere of ammonia and carbon at the temperature: 100, 300 i 600ºC. Photocatalyst were characterized by FTIR/DRS, UVVis/DR, BET and XRD methods. Moreover the compressive strength tests of modified gypsum were also done. Photocatalytic activity of gypsum plates was done during NOx decomposition. The highest photocatalytic activity has gypsum with 20 wt.% addition of TiO2-N,C obtained at 300ºC.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 3; 8-12
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary studies of photocatalytic activity of gypsum plasters containing TiO2 co-modified with nitrogen and carbon
Autorzy:
Janus, M.
Bubacz, K.
Zatorska, J.
Kusiak-Nejman, E.
Czyżewski, A.
Morawski, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/778867.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
titanium dioxide
gypsum
TiO2/N
self-cleaning
Reactive Red 198
Opis:
The conducted studies were focused on the development of the gypsum material exhibiting self-cleaning properties. To this end, the raw gypsum was mixed with unique TiO2-based photocatalysts, previously modified by nitrogen and/ or carbon doping. The photocatalytic activity of the obtained gypsum plasters was evaluated trough the degradation of model organic compound (Reactive Red 198) under UV-vis irradiation. The impact of the photocatalysts presence on the physicochemical properties of the obtained gypsum plasters was evaluated. Furthermore, the role of non-metals presence on the photocatalytic properties of the TiO2 was determined. It was confirmed that the addition of N,C co-modified titanium dioxide into gypsum bestows this material with self-cleaning properties. The highest dye removal rate was displayed by the gypsum plaster containing optimal amount (10 wt%) of co-modified TiO2/N,C photocatalyst, after 20 hours of UV-vis irradiation.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 2; 96-102
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
How to resolve Pleistocene stratigraphic problems by different methods? A case study from eastern Poland
Autorzy:
Terpiłowski, S.
Zieliński, T.
Kusiak, J.
Pidek, I.A.
Czubla, P.
Hrynowiecka, A.
Godlewska, A.
Zieliński, P.
Małek, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059725.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
chronostratigraphy
geochronology
interglacial meandering river
Pleistocene
Mazovian/Holsteinian
Eastern Poland
Opis:
Different methods have been used to determine the stratigraphic position of Pleistocene alluvial deposits, particularly fluvial interglacial deposits. Near-surface deposits of a meandering river, developed in point-bar and oxbow lake facies, in the Samica River valley (near Łuków, eastern Poland) have been investigated. The fossil valley is incised into the till plain and the outwash. The fluvial succession is locally overlain by solifluction deposits. All the deposits underwent sedimentological analysis. The petrographic composition of basal till occurring in the vicinity of a fossil valley was determined with the method of indicator erratics. Fluvial deposits were examined by pollen analysis and plant macrofossil analysis of oxbow lake facies. Absolute dating methods were applied to the deposits (thermoluminescence methods: TL and additionally IRSL). Lithological differences between fluvial and the surrounding glaciofluvial deposits were identified and their lithostratigraphic position assigned. Petrographic analysis of till and palaeobotanical analyses of oxbow lake facies gave compatible results. Fluvial deposits were formed after the Sanian 2/Elsterian Glaciation, during the Mazovian/Holsteinian Interglacial. Luminescence dating of the fluvial deposits by the TLMAX method yielded the most relevant results (412-445 ka), which indicate that these deposits were formed during the end of the MIS 12 and beginning of the MIS 11 stage.
Źródło:
Geological Quarterly; 2014, 58, 2; 235--250
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
What forced the prehistoric cattle-keepers to emigrate from the Red Sea Mountains?
Autorzy:
Bobrowski, P.
Jórdeczka, M.
Kobusiewicz, M.
Chłodnicki, M.
Kusiak, J.
Powiązania:
https://bibliotekanauki.pl/articles/2027031.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cat tle-keep ers
Red Sea Hills
Su dan
chro nol ogy of rock art
Opis:
To day’s desert area of Red Sea Hills is now in hab ited by a Beja-Bisharin tribe, the camel breed ers. In pre his toric times, this area was in hab ited or pen e trated by pas to ral com mu ni ties en gaged in cat tle breed ing. Their oc cu pa tion is pri mar ily marked by thou sands of en grav ings with rep re sen ta tions of long-horned cat tle, which were dis cov ered in a rock art gal lery in Bir Nurayet, one of the larg est rock art gal ler ies in Af rica and the whole world. We still do not know when the shep herds and their herds aban doned the area. This is sue can be ad dressed by geoarchaeology and in ves ti ga - tion of sed i ments dis cov ered in Wadi Diib, i.e. silts. As we be lieve, they re cord cli mate and en vi ron men tal changes tak ing place in re cent mil len nia, which prob a bly to a large ex tent de ter mined the socio-cul tural pro cesses in the area.
Źródło:
Studia Quaternaria; 2013, 30; 135-142
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SHRIMP U-Pb zircon chronology of the Polish Western Outer Carpathians source areas
Autorzy:
Budzyń, B.
Dunkley, D. J.
Kusiak, M. A.
Poprawa, P.
Malata, T.
Skiba, M.
Paszkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/191475.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
zircon
U-Pb geochronology
ion microprobe
provenance
Carpathians
Opis:
The Western Outer Carpathians flysch of Poland comprises clasts of crystalline rocks representing source areas that supplied sedimentary basins with clastic material. Zircon from quartz syenite and granite cobbles representing the Silesian Ridge, the currently unexposed source area located at the southern margin of the Silesian Basin, yielded uniform U-Pb dates of 604š6 Ma and 599š6 Ma. These are interpreted as the age of igneous crystallization. Similarly, zircon from a gneiss cobble derived from the northern source terrain gave 610š6 Ma date, which is interpreted as the age of crystallization of the granitic protolith to the gneiss. The Neoproterozoic magmatism is interpreted to have occurred at the Gondwana active margin.
Źródło:
Annales Societatis Geologorum Poloniae; 2011, 81, No 2; 161-171
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
TiO2 modified by ammonia as a long lifetime photocatalyst for dyes decomposition
Autorzy:
Choina, J.
Dolat, D.
Kusiak, E.
Janus, M.
Morawski, A.W.
Powiązania:
https://bibliotekanauki.pl/articles/778832.pdf
Data publikacji:
2009
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
fotokataliza
TiO2 modyfikowany azotem
żywotność
photocatalysis
nitrogen-modified TiO2
lifetime
Opis:
Ammonia-modified TiO2 (TiO2/N), prepared in a pressure reactor was used as the well- active and longlife photocatalyst for the azo dye (Reactive Red 198) decomposition. The effect of aeration and the different value of the pH of the reaction medium on the photocatalytic degradation of Reactive Red 198 in water has been investigated. It has been reported that the degradation is greatly influenced by the reaction pH and the faster decomposition of azo dye took place at pH 3.5. When the solution was acidic, a larger amount of azo dye on the positively charged surface of TiO2 photocatalysts was adsorbed. From the obtained results it can be seen that the effectiveness of the decolourisation of the solution was faster by using the nitrogen-modified TiO2.
Źródło:
Polish Journal of Chemical Technology; 2009, 11, 4; 1-6
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania zużycia przez utlenianie i korozję powierzchni rozpylaczy wtryskiwaczy silników okrętowych
Researches of oxidative wear and corrosion of the surfaces of marine engine injector nozzles
Autorzy:
Monieta, J.
Kusiak, P.
Powiązania:
https://bibliotekanauki.pl/articles/256152.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
silnik okrętowy
rozpylacz wtryskiwaczy
zużycie
utlenianie
korozja
marine engine
injector nozzles
wear
oxidation
corrosion
Opis:
W artykule przedstawiono wyniki badań własnych intensywności zużycia korozyjnego oraz utleniającego korpusów i iglic rozpylaczy wtryskiwaczy silników okrętowych. Badane obiekty były użytkowane w naturalnych warunkach eksploatacyjnych w środowisku olejów pozostałościowych. Eksperyment przeprowadzono z wykorzystaniem metod: wagowej, mikroskopowej i analizy obrazów.
This paper presents the results of research on the wear intensity caused by corrosion and oxidation bodies and injection needles of marine diesel engine injectors. The objects of research were utilised in the natural conditions of ships in a residual fuel medium and the reaction of processes in the combustion chamber. The experiment was carried utilising gravimetric and microscope methods and images analysis.
Źródło:
Problemy Eksploatacji; 2008, 1; 113-120
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Próba rekonstrukcji rzeźby terenu i środowiska z okresu funkcjonowania późnomagdaleńskiego obozowiska w Wilczycach (Wyżyna Sandomierska)
Autorzy:
Bałaga, K.
Hołub, B.
Kusiak, J.
Łanczont, M.
Mroczek, P.
Zieliński, P.
Komar, M.
Powiązania:
https://bibliotekanauki.pl/articles/294759.pdf
Data publikacji:
2008
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
rekonstrukcja rzeźby terenu i środowiska
obozowisko późnomagdaleńskie
Wilczyce
Wyżyna Sandomierska
Źródło:
Landform Analysis; 2008, 9; 269-271
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
True and anomalous TL dates from Late Pleistocene loess-palaeosol deposits at the Kolodiiv site (East Carpathian Fore land, Ukraine)
Autorzy:
Kusiak, J.
Powiązania:
https://bibliotekanauki.pl/articles/2059491.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
TL dating
total-bleach method
loess
palaeosols
Opis:
Twenty-five samples were selected from the Kolodiiv site (7 profiles) for total-bleach thermoluminescence dating. Only about 50% of the TL ages corresponded well to the age expected on the basis of geological interpretation. The rest of the TL dates are over estimates. The discrepancies between the TL age and the geological age of the deposits probably resulted from the presence of an admixture of poorly bleached material, of local origin, transported over a very short distance.
Źródło:
Geological Quarterly; 2007, 51, 2; 167-172
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ metod pozyskiwania i zrywki drewna w rębniach złożonych na poziom uszkodzeń środowiska leśnego
Effects of wood harvesting and extraction methods in shelterwood cuttings on the damage caused to forest environment
Autorzy:
Grodecki, J.
Stempski, W.
Kusiak, W.
Powiązania:
https://bibliotekanauki.pl/articles/799590.pdf
Data publikacji:
2002
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Opis:
The paper presents results of investigations into soil and tree injuries caused by wood extraction in the process of shelterwood cuttings in a beech stand. Two work methods were used for the harvesting of wood. In the first variant the trees were delimbed, then felled and cut into logs. The logs were extracted by a forwarder. In the second variant the trees were first felled and then delimbed. The uncut stems were skidded by an agricultural tractor. The results of the investigation show that shelterwood cuttings involve a substantial risk of injury and destruction to the tree stand in which the cuttings are carried out. In the second wood harvesting variant, with the skidding of stems, 86% of trees (302 trees per ha) were injured. 26% of that number were trees that were destroyed. In the work variant, in which the delimbed trees were felled, cross-cut and the logs were extracted with a forwarder, 32% of trees were injured, out of which 11% were destroyed. The injured surface area of the soil was 4% in the variant with the forwarder nad 21% in the wood harvesting variant with the agricultural tractor.
Praca prezentuje wyniki badań nad uszkodzeniami drzew i gleby leśnej powstałymi podczas ścinki i zrywki drewna z cięć odsłaniających w drzewostanie bukowym. Zastosowano dwa warianty. Wariant I - ścinki drzew dokonano po uprzednim ich okrzesaniu, a zrywkę wymanipulowanych przy pniu kłód dokonano ciągnikiem forwarder. Wariant II - okrzesania ściętych drzew dokonano tradycyjnie, a zrywkę wleczoną drewna długiego dokonano ciągnikiem rolniczym. Przeprowadzone badania wykazały, że z wykonawstwem cięć uprzątających związane jest wysokie ryzyko powstania znaczących uszkodzeń i zniszczeń w poddanym zabiegowi drzewostanie. W wariancie tradycyjnym ze zrywką wleczoną dłużyc uszkodzeniu uległo łącznie 86% drzew (302 szt.·ha⁻¹), przy czym drzewa zniszczone stanowiły 26%. W wariancie ze ścinką drzew okrzesanych i zrywką nasiębierną, procent drzew uszkodzonych wynosił 32, natomiast drzew zniszczonych 11. Uszkodzenia gleby w przypadku zrywki forwarderem obejmowały około 4% powierzchni. Natomiast zrywka wleczona spowodowała uszkodzenie 21% powierzchni badanego drzewostanu.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 2002, 486, 1
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 16

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