Wszystkie pola: thinning - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Uszkodzenia drzew w nizinnych drzewostanach świerkowych podczas zabiegu trzebieży późnej
Tree damage in lowland spruce stands because of late thinning
Autorzy:: Bembenek, M.
Giefling, D.F.
Karaszewski, Z.
Mederski, P.S.
Szczepańska-Alvarez, A.
Powiązania:: https://bibliotekanauki.pl/articles/993989.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
uzytkowanie lasu
drzewostany nizinne
trzebiez pozna
pozyskiwanie drewna
metody pozyskiwania drewna
drzewostany swierkowe
swierk
uszkodzenia drzew
norway spruce
tree damage
thinning operations
Opis:: The paper studies tree damage after late thinning operation in lowland spruce stands. The research was done in the 4ͭʰ age class stands, where three different methods of timber harvesting were applied: full tree system (FTS), long wood system (LWS), short wood system (SWS). The lowest level of damage was observed in SWS.
Źródło:: Sylwan; 2013, 157, 12; 892-898
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Wpływ sposobu zrywki i doświadczenia wykonawcy na wielkość uszkodzeń drzew na powierzchniach trzebieżowych Nadleśnictwa Chojnów
Influence of skidding method and the contractors experience on the size of tree damage on the thinning areas in the Chojnow Forest District
Autorzy:: Maciak, A.
Popczyński, B.
Powiązania:: https://bibliotekanauki.pl/articles/980293.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
drzewostany potrzebiezowe
pozyskiwanie drewna
zrywka drewna
zrywka nasiebierna
zrywka nasiebierna laczona z wleczona
uszkodzenia drzew
operatorzy maszyn lesnych
doswiadczenie zawodowe
Nadlesnictwo Chojnow
thinning
skidding
forwarder
tractor ground skidding
damage to trees
Opis:: Skidding includes timber transport from the place of its harvest to the place of its storage, loading or pre−treatment. This process in the thinned stands can result in serious damage to the remaining trees. The purpose of the described research was to characterize and compare the size and location of damage in the thinned stands after forwarder skidding with the damages resulting from the combined forwarder and tractor ground skidding. These tests also aimed at determining whether the contractor’s experience affects the level of damage. The research was carried out on four study plots located in the Chojnów Forest District (C Poland). Although the works on each plot were performed by different contractor, they had equipment of comparable technical and overall parameters.The height of the damage, the distance of the damaged tree from the skidding trail and the size of the damage were measured. Damage was classified according to the degree of the tissue damage. The most serious damage occurs at a distance of up to 1 m from the skidding trail and at a height of up to 1 m. The most severe damage was over 1/8 of the trunk perimeter. No significant dependence of the size and location of damages on the skidding method was found.The highest fraction of the damaged trees was recorded on the area in the Młochów Forest Range (5.17%) where only the forwarder skidding took place. In the Sierzechów Forest Range (the same method of skidding, but almost twice as dense stand), there was significantly less damage (0.62%). In this case, the share of the damaged trees was the smallest, despite the highest number of trees. The reason for this may be the impact of the human factor on the amount of damage as the most experienced contractor worked on that study plot.
Źródło:: Sylwan; 2019, 163, 01; 25-34
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Uszkodzenia drzew i odnowienia w wyniku ręczno-maszynowego pozyskania drewna z wykorzystaniem urządzeń agregowanych z ciągnikami rolniczymi
Damage to trees and regeneration as a result of motor-manual timber harvesting using equipment aggregated with farm tractors
Autorzy:: Stańczykiewicz, A.
Powiązania:: https://bibliotekanauki.pl/articles/973972.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: odnowienia lasu
pozyskiwanie drewna
procesor HYPRO
procesor NIAB 5-15
technologia pozyskiwania
uszkodzenia drzew
wciagarka Fransgard 6000 GS
ciecia pielegnacyjne
zebiegi pielęgnacyjne
agregaty ciągnikowe
ciągniki rolnicze
drzewostany młode
leśnictwo
drzewa leśne
thinning processor
cable winch
farm tractor
selective early thinning
pine stands
Opis:: The research was conducted in thinned pine stands, age class II, where cutting was carried out with chainsaws. Subsequent operations were performed using a NIAB 5−15 and HYPRO 450 delimber−bucker processor and a FRANSG RD 6000 cable winch aggregated with farm tractors. The timber harvesting technology was applied with a cut−to−length system using processors, and with a tree−length system using a cable winch. In the selected stands, nine study plots were established, in which the inventory of stand layers: trees and undercanopy regeneration was carried out twice (before and after felling). Based on the obtained data, the level of damage to trees and regeneration after thinning operations was calculated. In the case of the technology using processors, the level of damage to trees in individual manipulation plots was within the range of 4.3%−8.6% (total 7%), while for the winch technology it was from 3.1% to 5.8% (total 4.5%). As regards regeneration, damage resulting from the harvesting and skidding of timber using processors in individual manipulation plots was at a level of 4.1%−13.5% (total 8.5%) and damage resulting from the harvesting and skidding using a winch cable from 5.8% to 17.0% (total 9%).
Źródło:: Sylwan; 2011, 155, 02; 129-137
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Rozmiar i charakter naruszeń wierzchniej warstwy gleby powstałych podczas pozyskiwania i zrywki drewna w trzebieżach wczesnych drzewostanów świerkowych
The size and nature of damage to the topsoil caused by timber extraction and skidding during early thinning operations in spruce stands
Autorzy:: Sowa, J.
Kulak, D.
Stańczykiewicz, A.
Szewczyk, G.
Powiązania:: https://bibliotekanauki.pl/articles/973654.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: pozyskiwanie drewna
zrywka drewna
warstwa wierzchnia
uszkodzenia gleby
zrywka konna
zrywka linowa
wciagarka Multi-FKS
leśnictwo
lasy górskie
drzwostany świerkowe
trzebież wczesna
oddziaływanie na glebę
gleby leśne
timber harvest
damage
early thinning
horse skidding
winch skidding
Opis:: The study concerns the impact of two harvesting technologies – one based on a traditional horse skidding and one using a small MultiFKS winch powered by chainsaw motor on the size and nature of damage to the surface soil layer. The study was conducted in a spruce stand where early thinning was carried out. The total share of soil disturbed during harvesting operations was not large accounting for 2.99% of the cutting area for horse skidding and 1.73% for skidding using a MultiFKS winch. The volume of damage to the topsoil was 8.38 m3/ha and 2.64 m3/ha, respectively. The likelihood of disturbances of the soil layer was 47% for horse skidding and 31% for skidding by means of a winch. Both technologies were character−ized by a similar, ca 5% likelihood of cutting of topsoil to a depth larger than 5 cm. For both technologies the likelihood of soil compaction was significantly lower than soil cutting.
Źródło:: Sylwan; 2011, 155, 05; 330-339
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Badania wstępne zrywki konnej w trzebieży wczesnej drzewostanu sosnowego
Predvaritelnye issledovanija konnojj treljovki v rannejj rubke ukhoda sosnovogo nasazhdenija
Introductory studies on the horse skiddling at early thinning of pine stand
Autorzy:: Porter, B.
Powiązania:: https://bibliotekanauki.pl/articles/822638.pdf
Data publikacji:: 1988
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
drzewostany sosnowe
trzebiez wczesna
pozyskiwanie drewna
zrywka drewna
zrywka konna
Źródło:: Sylwan; 1988, 132, 05
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Przyrosty drzew uszkodzonych przy pozyskiwaniu drewna w drzewostanach sosnowych w trzebiezach poznych
Increments in trees injured during late thinning in pine stands
Autorzy:: Suwala, M.
Powiązania:: https://bibliotekanauki.pl/articles/45628.pdf
Data publikacji:: 2008
Wydawca:: Instytut Badawczy Leśnictwa
Tematy:: drzewostany sosnowe
uszkodzenia drzew
uszkodzenia mechaniczne
trzebiez pozna
przyrost miazszosci
drzewa uszkodzone
sosna zwyczajna
lesnictwo
przyrost drzew
Pinus sylvestris
drzewa lesne
pozyskiwanie drewna
Źródło:: Leśne Prace Badawcze; 2008, 69, 2; 101-108
1732-9442
2082-8926
Pojawia się w:: Leśne Prace Badawcze
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Wpływ szlaków zrywkowych na wzrost i rozwój drzew z nimi sąsiadujących
Effects of strip roads on the growth and development of neighbouring trees
Autorzy:: Stempski, W.
Grodecki, J.
Wudarczyk, M.
Powiązania:: https://bibliotekanauki.pl/articles/1009136.pdf
Data publikacji:: 2010
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
pozyskiwanie drewna
szlaki zrywkowe
oddzialywanie na rosliny
drzewa lesne
piersnice drzew
wysokosc drzew
wysokosc osadzenia korony
dlugosc korony
wzrost roslin
rozwoj roslin
strip roads
thinning
tree growth
tree development
Opis:: The paper presents research on dbh, height and biosocial structure of trees growing close to strip roads. Also, the length and height of tree crown were analysed. The studies comprised the trees localised along the strip roads as well as those growing 3 and 6 m away. The strip roads were cut 6 years before in the course of an early thinning in a pine stand. The thinning was conducted in three technological variants, which differed, among other things, in the width of the strip roads. The results confirmed the statistical significance of difference among some of the investigated traits.
Źródło:: Sylwan; 2010, 154, 04; 259-266
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Zastosowanie monitora pracy serca do oceny efektywnego wydatku energetycznego w ręczno-maszynowych technologiach pozyskiwania drewna
Use of heart rate monitor in assessing the net energy expenditure during motor-manual cutting
Autorzy:: Leszczyński, K.
Stańczykiewicz, A.
Powiązania:: https://bibliotekanauki.pl/articles/990022.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
pozyskiwanie drewna
robotnicy lesni
operatorzy pilarek spalinowych
fizjologia pracy
tempo metabolizmu
wydatek energetyczny
czestosc skurczow serca
energy expenditure
chainsaw operator
timber harvesting
metabolism rate
late thinning
Opis:: Energy expenditure during labour constitutes one of the criteria used for assessing the laboriousness of timber harvesting. The major objective of this study was to point out the possibilities of defining work net energy expenditure (NEE) as related to the frequency of heart rate in the field exercise tests by changing posture and varied external work load. The scope of the study was restricted to the work of chainsaw operators performing hard physical labour during late thinning of fir and spruce on the middle mountain (Beskid Makowski, Beskid Śląski). The research involved dynamic work with elements of static load for which the NEE was investigated by means of heart rate as well as respiratory – indirect estimation of oxygen consumption as results of airflow measurement. The advantage of both methods is simplicity of application, the lack of necessity to perform additional analyses as time study and expected medium error. The conducted calculations pointed out to a strong linear correlation, where correlative coefficient was equal to 0.67. The conducted model analysis (including, among others: the normality, autocorrelation of residuals and identification of influential values) has confirmed its validity at the 10% statistical error. The obtained regression coefficient indicates a larger increase in value as compared to the available formulas with acceptable in practice standard error of prediction on 6.05 kJ/min level.
Źródło:: Sylwan; 2014, 158, 02; 124-131
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Możliwości ręcznego przemieszczania surowca krótkiego podczas pozyskania sosny, świerka, brzozy i buka w cięciach pielęgnacyjnych
Capabilities of manhandling small logs in commercial thinning in pine, spruce, beech, and birch stands
Autorzy:: Tomczak, A.
Grzywiński, W.
Jelonek, T.
Powiązania:: https://bibliotekanauki.pl/articles/986671.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
drzewostany
ciecia pielegnacyjne
sosna
swierk
brzoza
buk
pozyskiwanie drewna
drewno krotkie
drewno sredniowymiarowe
masa drewna
reczne przemieszczanie surowca drzewnego
przemieszczanie ciezarow
health
musculoskeletal symptoms
loggers
weight of logs
green density
Opis:: The aim of this study was to measure the weight of timber obtained from freshly cut trees and compare it with the applicable legal provisions pertaining the capability of transporting heavy loads by hand and also to indicate a problem significant for the occupational safety and health protection of employees working at wood harvesting. In Poland, about 40 million m3 of timber is harvested annually. The logs, with small diameter and length, are prepared for forwarding by arranging them by employees in the so called ‘packages’, which are placed by the route of the machine that collects and transports them to the logging road. Manhandling of the logs is an activity requiring the greatest energy expenditure (over 30 kJ/min) in the process of tree harvesting. Furthermore, it is also one of the key factors, which may lead to the development of musculoskeletal disorders. Regulations existing in the Polish labour law regulate the permitted weight of transported loads depending on the activity duration. For loads transported single−handedly this is 30 kg for a permanent employer, whereas 50 kg for workers doing the job occasionally or temporarily (no more than 4 times per hour and no longer than 4 hours during workday). Logs heavier than 50 kg may be carried only collectively providing the requirements of the minimal length (0,75 m) of the log per one person are met. We produced 2,5 m long logs and weighted them with an accuracy of 0,1 kg. The analysis revealed that approximately 30% of logs weighed between 30 and 50 kg, which introduces limitations in the number of carried logs per one person within a single shift. However, about 10% of the pine, 15% of spruce, 12% of beech and 38% of birch logs were heavier than 50 kg which should prevent carrying them single−handedly. Unfortunately, collective preparation of timber for forwarding is not popular among workers due to reduction in output, and at the same time the lower salary. Even if log for forwarding is prepared by two labourers, they most often work separately. As a result, the limits of the weight carried single− handedly by labourer are notoriously violated and exceeded.
Źródło:: Sylwan; 2018, 162, 07; 531-538
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Rozmiar i charakter naruszeń wierzchniej warstwy gleby powstałych podczas pozyskiwania drewna w trzebieżowym drzewostanie jodłowym
Size and character of the damage to the top soil layer caused during harvest in a thinned fir stand
Autorzy:: Kulak, D.
Seńczyszyn, L.
Powiązania:: https://bibliotekanauki.pl/articles/1008885.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
drzewostany jodlowe
trzebieze
pozyskiwanie drewna
zrywka drewna
oddzialywanie na glebe
gleby lesne
warstwa wierzchnia
uszkodzenia gleby
damage from timber extraction
early thinning
fir stand
farm tractor
Opis:: The paper depicted size and character of the disturbances in top soil layer in a fir stand after early thinning. The treatment was performed in summer using engine−driven chain saws and a farm tractor with a skidding trailer. Size of topsoil damage was confirmed to be very low, with the value of Ug index below 1.5%. In the experiment, the probability analysis of topsoil disturbances showed their decline with the growing distance from the skid road.
Źródło:: Sylwan; 2011, 155, 08; 509-517
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki