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Wyświetlanie 1-15 z 25
Tytuł:
Wplyw dziesiecioletniego nawozenia sciekami ziemniaczanymi na runo w drzewostanach sosnowych i plantacjach drzew
Autorzy:
Dygus, K.H.
Powiązania:
https://bibliotekanauki.pl/articles/819705.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
scieki przemyslowe
zmiany skladu gatunkowego
drzewostany sosnowe
runo lesne
nawozenie
lesnictwo
uprawa plantacyjna
uprawy lesne
Źródło:
Sylwan; 1995, 139, 10; 23-33
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wplyw grzybow ektendomikoryzowych i bakterii dwuazotroficznych na siewki sosny [Pinus sylvestris L.] - in vitro
Autorzy:
Redlak, K.
Dahm, H.
Powiązania:
https://bibliotekanauki.pl/articles/817741.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
ektendomikoryza
grzyby mikoryzowe
bakterie dwuazotroficzne
mikoryza
sosna zwyczajna
lesnictwo
siewki
badania in vitro
Pinus sylvestris
drzewa lesne
Źródło:
Sylwan; 2001, 145, 03; 81-91
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena tempa zmian kosztów produkcji drewna "przy pniu" i cen surowca drzewnego w latach 2001-2009 na przykładzie Regionalnej Dyrekcji Lasów Państwowych w Zielonej Górze
Evaluating variation in logged timber costs and raw timber prices during the period, 2001-2009, for the Regional Directorate of the State Forests in Zielona Gora
Autorzy:
Adamowicz, K.
Kaciunka, H.
Powiązania:
https://bibliotekanauki.pl/articles/1316105.pdf
Data publikacji:
2014
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
produkcja lesna przy pniu
produkcja drewna
koszty produkcji
drewno
sortymenty drewna
ceny
zmiany cen
RDLP Zielona Gora
forest management
economics
marketing
prices
costs
rate of growth
Opis:
The rate of change in the cost of logged timber and prices of raw timber during the period, 2001-2009, was examined for the Regional Directorate of the State Forests in Zielona Góra. A logarithmic evaluation of average rate of change indicated that the rate of increase in timber harvest costs was higher than the rate of increase in the average price of raw timber and likewise the price of most log grades. The average increase in raw timber value was 2.51% annually. The price of low-diameter raw timber (slash) increased 8.61%, and the price of large-diameter timber increased 1.94% annually, while the price of large coniferous segments increased 1.75% and broadleaf segments increased 2.98% annually. At the same time, the timber logging costs increased more than the timber price, to 4.17%, or 4.19% when administrative costs related to timber logging are included.
Źródło:
Leśne Prace Badawcze; 2014, 75, 1; 55-60
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kierunki modyfikacji statusu Lasów Państwowych w Polsce
Trends in modification of the status of the State Forests in Poland
Autorzy:
Szramka, H.
Adamowicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/989041.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
gospodarka lesna
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
status organizacyjno-prawny
zarzadzanie
kierunki zmian
forest economics
legal status
organisation
changes trend
Opis:
Over the last years, criticism of the State Forests policy has been becoming more and more frequent in the press. For that reason it is very important to inspire changes in the State Forests organisation system that will result in its adaptation to the changing requirements of the social market economy. From the economic point of view one of the most important problem is that the State Forests is an economic organisation without legal personality. This fact facilitates unjust criticism of this entity that leads to restriction in its economic activity and eventually decreases maximum gains from its resources. We present trends of changes from status quo across legitimate company to joint stock union and the budget unit. It is proposed to confer legal personality on the forest economic units so they become legitimate companies. Moreover it is also suggested to use the State Forests profits as evaluation criteria of its economic activity. The generated profits should be sufficient to protect owner (i.e. the state) interests and is intended to implement them to achieve important social and economic features. In addition, a new motivation system based on the incomes considering the interest of the state, company and the employers should be developed. In order to reduce conflicts that arise from limited ability to use environmental and social functions, efforts should be made to precisely determine leading functions of chosen forest areas. The main goal of the proposed legal and organizational reform of the State Forests is to create conditions to generate higher legal revenues from various from of forest activity and allocate them for implementation of non−economic forest functions. This would make possible to achieve greater social acceptance of actions made by the franchise.
Źródło:
Sylwan; 2017, 161, 05; 355-364
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Opłacalność zalesień gruntów rolnych w ramach Programu Rozwoju Obszarów Wiejskich
Profitability of the farmland afforestation within the Rural Development Programme
Autorzy:
Kurowska, K.
Kryszk, H.
Powiązania:
https://bibliotekanauki.pl/articles/989069.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
grunty porolne
zalesianie
oplacalnosc
Program Rozwoju Obszarow Wiejskich
farmland afforestation
rural development programme
profitability
Opis:
Sustainable development and afforestation measures aiming to preserve the leading role of the forests are important elements of spatial, environmental and economic policies. The economic efficiency of afforestation schemes covering arable and other types of land was evaluated in view of the policies aiming to increase the afforestation rate and improve the land−use structure in the rural areas. The evaluated afforestation measures were introduced in Poland in 2004 as part of the Rural Development Programme (RDP). The principles and criteria applicable to every RDP framework, i.e. 2004−2006, 2007−2013 and 2014−2020, were taken into account. Special attention was paid to processes that significantly influenced afforestation practices in the analysed periods. Economic efficiency was evaluated for two exemplary plots of arable land. The results of the profitability analysis indicate that current legislation discourages farmers from embarking on afforestation projects. The above can be attributed to the maximum permitted area of afforestation per beneficiary (no limitations in the previous RDPs, 20 ha in the present one), shorter validity of afforestation premiums (12 instead of 20 years) and the introduction of more rigorous afforestation criteria in 2015. The afforestation principles under RDP 2004−2006 were the most favourable for farmers, and the highest afforestation rates were reported during that period. Individual farmers could play an important role in the afforestation process. However, farmers' attachment to arable land, the availability of more profitable measures under the RDP, direct subsidies and the overestimation of the prices of arable land relative to forests discouraged afforestation, even in areas characterized by poor soils. On 1 May 2016, the Polish government introduced additional restrictions on trade in agricultural land, which would additionally decrease the popularity of afforestation measures among individual farmers.
Źródło:
Sylwan; 2017, 161, 12; 1035-1045
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przydatność dębowych zrębków z całych drzew do przerobu na płyty pilśniowe twarde
Usefulness of oak chips of whole trees for conversion into hartboards
Autorzy:
Gornowicz, R.
Jablonski, K.
Rozanski, H.
Powiązania:
https://bibliotekanauki.pl/articles/813130.pdf
Data publikacji:
1991
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany debowe
dab
zrebki drzewne
zrebki debowe
wykorzystanie
przydatnosc technologiczna
plyty pilsniowe twarde
Źródło:
Sylwan; 1991, 135, 11
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przyrost miąższości drzewostanów mieszanych i litych: wyniki z wybranych stałych powierzchni badawczych w Europie Środkowej
Volume growth of mixed-species versus pure stands: results from selected long-term experimental plots in Central Europe
Autorzy:
Bilak, K.
Dudzińska, M.
Pretzsch, H.
Powiązania:
https://bibliotekanauki.pl/articles/989685.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany lite
drzewostany mieszane
drzewostany swierkowo-bukowe
drzewostany debowo-bukowe
stale powierzchnie obserwacyjne
stopien zmieszania drzew
przyrost miazszosci
european beech
norway spruce
sessile and pedunculate oak
mixed stand
pure stand
facilitation
competition
overyielding
underyielding
close−to−nature silviculture
Opis:
This paper addresses the question of whether or not and to which extent two common tree species mixtures (Norway spruce – European beech; sessile and pedunculate oak – European beech) vary in volume growth from their monocultures. To this end, the results from selected long−term experimental plots located in Germany, Poland and Switzerland, with many of them under survey since the 1890's, were employed. We found than on average both type of mixtures exceeded volume growth in pure stands by almost 30%. The analysis at the species level showed than only a Norway spruce response to mixture was neutral on average, while other tree species were benefitted by mixture. An empirical derived model for mixed stand of oak and European beech disclosed that the interaction can range from facilitation and overyielding on poor sites, through the neutral response under mesotrophic conditions, up to underyielding on fertile sites triggered by competition.
Źródło:
Sylwan; 2015, 159, 01; 22-35
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ redystrybucji środków funduszu leśnego na rentowność nadleśnictw
Effect of redistribution of forestry fund financial resources on the economic profitability of the forest districts
Autorzy:
Adamowicz, K.
Dyrcz, A.
Szramka, H.
Powiązania:
https://bibliotekanauki.pl/articles/989963.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
RDLP Wroclaw
zarzadzanie finansami
fundusz lesny
redystrybucja
nadlesnictwa
rentownosc
financial system
forestry fund
forest management financing
Opis:
The study determines the effect of re−allocation of forestry fund financial resources within the forestry sector on the assessed profitability of economic activity of forest districts. The financial standing of forest districts was evaluated based on the return on equity (ROE) and current ratio (CR). The analysis showed the effect of redistribution of forestry fund financial resources on changes in profitability of forest districts.
Źródło:
Sylwan; 2014, 158, 07; 483-490
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwości określania powierzchni oddziałów w schematycznym podziale powierzchniowym
Vozmozhnosti opredelenija ploshhadi kvartalov v skhematicheskom delenii prostranstva
Possibilities of determining the area of compartments at schematic area division
Autorzy:
Bedkowski, K.
Korpetta, D.
Olenderek, H.
Powiązania:
https://bibliotekanauki.pl/articles/814415.pdf
Data publikacji:
1988
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
urzadzanie lasu
oddzialy lesne
wielkosc powierzchni
bledy pomiarowe
Źródło:
Sylwan; 1988, 132, 06
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Leśnictwo w sektorowym rozwoju gospodarki w Polsce
Forestry in sectoral economic development in Poland
Autorzy:
Szramka, H.
Starosta-Grala, M.
Adamowicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/989586.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
ekonomia
rozwoj gospodarki
rozwoj sektorowy
sectoral development
economy
state forests
poland
Opis:
The theory of sectoral economic development is evolving, as new forms of work organization and new economic sectors are created. Lack of clear definition of the economic sector makes it difficult to determine the impact of economic sectors on the development of the Polish forestry precisely. Forestry activities focus in three main sectors of the economy: agriculture, industry and services. In addition, they focus in three institutional sectors: the non−financial corporate sector, the household sector and the sector of government and in two ownership sectors: public or private one and in many co−operative sectors such as: forestry−wood, raw materials or defensive. Considering the place and the role of forestry from the viewpoint of the three−sector theory, it should be noted that most of the administrative and economic activities of the State Forests belong to the primary sector (agriculture). The industrial/manufacturing sector includes additional production associated with the wood and other forest products processing. This sector in the Polish forestry is currently neglected, but it used to be important, especially in the 1920−1930s. The tertiary sector comprises of services provided by the forestry, transport, construction and installation, training and leisure activities and others. This sector is growing rapidly and should endeavor to the commercialization of educational, recreational or defensive services, which are not currently measured. Analyzing the place of forestry among institutional sectors, we should state that forestry has the most significant importance in the non−financial corporate sector as the State Forests and forestry service companies (employing more than nine people) belong to this sector. In the household sector, there are small forestry service companies employing up to nine people and natural persons obtaining income from logging of private forests and other wooded lands. Whereas, in the government sector, there are mainly communal cities and municipal forests and traders running forestry activities in state forests of other ministries. Considering the development of the Polish forestry from the viewpoint of ownership sectors, it must be noted that since 2012 more people have been employed in the private sector and the gross added value of production has been higher in the private sector. The development of Polish, multifunctional forestry, in accordance with the principles of sustainable economic and social development, should be considered in the context of social needs and expectations, which change with the socio−economic development of the country.
Źródło:
Sylwan; 2016, 160, 05; 416-423
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ siarczanu glinu na wybrane właściwości gleby oraz na wydajność i jakość sadzonek sosny zwyczajnej w leśnej szkółce gruntowej
Impact of aluminium sulphate fertilizer on selected soil properties and the efficiency and quality of pine seedlings in the forest ground tree nursery
Autorzy:
Januszek, K.
Stępniewska, H.
Błońska, E.
Molicka, J.
Kozieł, K.
Gdula, A.
Wojś, A.
Powiązania:
https://bibliotekanauki.pl/articles/1317650.pdf
Data publikacji:
2014
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
szkolki lesne
gleby
odczyn gleby
siarczan glinu
wlasciwosci fizykochemiczne
aktywnosc enzymatyczna
fosfataza kwasna
wschody
sadzonki
drzewa lesne
sosna zwyczajna
Pinus sylvestris
mikoryza
ektomikoryza
soil pH
aluminium sulphate
pine seedlings quality
ectomycorrhizae
damping-off
Opis:
The alkalization of soil is a common phenomenon in forest ground nurseries. Liming, inadequate fertilization and the use of hard water for irrigation are the main reasons for this alkalization. The aim of this study was to investigate the effect of fertilization with aluminium sulphate on soil pH, the activity of selected soil enzymes, efficiency as well as the growth parameters of pine seedlings. The study was conducted in a forest nursery, on a plot with soil pH 6.4 in water and 5.9 in 1MKCl. Such a pH is not conducive to the production of conifer seedlings, particularly pines. Two different doses of aluminium sulphate fertilizer were applied: 740 kg ha-1 and 1110 kg ha-1. Both doses significantly reduced the soil pH, whereas soil enzyme activity did not change. The lower dose had a positive impact on the growth parameters of pine seedlings, while the higher dose led to their deterioration. We observed statistically significant differences in average primary and lateral root lengths, number of short roots, and thickness of the neck root of seedlings. One- and 2-year-old seedlings did not show symptoms of nutrient deficiency and neither did concentrations of the investigated macronutrients and selected micronutrients in needles indicate such. After applying the higher fertilizer dose, we observed a favourable change in the composition of mycorrhizae. Out of the potential seedling pathogens we found Cylindrocarpon spp., Fusarium spp., Phytophthora spp., Pythium spp. and Rhizoctonia solani of which the most frequent were Fusarium oxysporum, Pythium spp. and R. solani. Their occurrence frequency differed between the treatments used in this experiment. This study confirms the positive effects of a low aluminium dose on the performance and growth parameters of pine seedlings. However, on the basis of the conducted experiments, it is difficult to say, whether this positive effect is due to a direct action of aluminium on the seedlings or rather an indirect effect caused by lowering the soil pH, which in turn impacts on mycorrhizae composition and hence pathogen development.
Źródło:
Leśne Prace Badawcze; 2014, 75, 2; 127-138
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wpływu wybranych zabiegów hodowlanych i typów siedliskowych lasu na koszt pozyskania surowca drzewnego w czyszczeniach i trzebieżach
Evaluating the impact of silvicultural treatments and forest habitat type on the cost of timber harvest in cleanings and thinnings
Autorzy:
Adamowicz, K.
Gostołek, R.
Jaszczak, R.
Szczypa, P.
Szramka, H.
Powiązania:
https://bibliotekanauki.pl/articles/989459.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
gospodarka lesna
typy siedliskowe lasu
zabiegi hodowlane
pozyskiwanie drewna
koszty
trzebieze
czyszczenia pozne
forest economics
forest habitat type
costs
silviculture
Opis:
Integrating the economic aspects of forest management (cost) with ecological elements of timber production (habitat type) significantly contributes to a better understanding of forest growth and utilisation. The type of silvicultural treatments and forest habitat types determine number of economic activities carried out in the stands and have an important impact on the associated costs. The aim of the study was to describe the impact of silviculture treatments and types of forest habitat on unit timber harvesting cost. We summarised the cost of timber logging depending on the harvest practices and types of habitats. In total, costs of treatments performed on the 2.5 thousand ha area were analysed. Obtained results were combined in relation to average unit costs of raw timber logging from individual habitats and silviculture treatments such as late cleanings and thinnings. The studied impact was assessed with standard deviation (SD) based on the assumption that the higher its value, the more important role of silvicultural treatments and forest habitats in defining the cost of raw timber harvesting. Our study showed that both factors (type of forest habitat and silvicultural treatment) had an effect on variability of timber logging costs. Comparing deciduous and coniferous habitats, higher costs were reported for the latter one. The highest unit cost of timber logging was found on the fresh coniferous habitat, while the lowest on the wet mixed forest. Moreover, the highest cost was reported for timber raw material harvested from late cleanings and the lowest from late thinnings. SD of the average cost of timber harvest ranged from 12.67 to 13.53 PLN depending on the silviculture treatments and from 0.68 to 2.39 PLN depending on the forest type. Our findings are important preliminary steps in broader study regarding revenues generated from forest stands growing on different habitats. Eventually it would help in assessing the profitability of economic activity that depends on environmental conditions of forest management.
Źródło:
Sylwan; 2016, 160, 12; 993-1001
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 25

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