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Tytuł:
Ocena zmian w drzewostanie sosnowym na gruncie porolnym po 30 latach od wykonania pierwszych cięć pielęgnacyjnych bez zabiegu ochronnego przeciw hubie korzeni
Assessment of changes in a pine stand established on post−agricultural land after 30 years from first improvement cutting without application of protective measures against root rot
Autorzy:
Sierota, Z.
Małecka, M.
Powiązania:
https://bibliotekanauki.pl/articles/1024297.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewostany sosnowe
huba korzeni
grunty porolne
zmiany w drzewostanach
lesnictwo
Heterobasidion annosum
fitopatologia lesna
pinus sylvestris
post−agricultural land
root rot
phlebiopsis gigantea
Opis:
Changes in silvicultural and phytopathological parameters have been assessed in a 55−year−old pine stand established on post−agricultural land after 30 years from the application of three types of cutting (selective 10%, line every 4 and every 6 row) in this stand. It has been demonstrated that root rot causes changes in number and volume of merchantable timber of trees when protective treatments to stumps using the fungus Phlebiopsis gigantea are not applied during first improvement cuttings.
Źródło:
Sylwan; 2003, 147, 12; 19-26
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie wad wielkowymiarowego drewna sosnowego w normalizacji krajów Unii Europejskiej
Comparison of the large-size wood defects in the European Union countries normalization
Autorzy:
Malinowski, Z.
Wieruszewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/986941.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewnictwo
sosna zwyczajna
Pinus sylvestris
drewno sosnowe
drewno okragle
drewno wielkowymiarowe
wady drewna
normalizacja
normy polskie
normy europejskie
standards
qualitative classification
round wood
scots pine
Opis:
Scots pine wood is widely used in many branches of the wood industry. The possibility to select the raw material quality according to the specific processing needs corresponding to different uses is related with the issues of the standardisation, which comprises classification based both on the dimensions of processed assortments as well as their defects and traits of anatomical construction. In the last two decades of economic transformations in Poland, there has been increasing importance of the standardisation process because of the trade between the European Union (EU) member−states. EU−membership involved gradual adjustment to the rules of round wood trade, which are applicable in the old EU member−states. Many international certification institutions as well as the Polish Committee for Standardisation were involved in the process of standardisation. The experience of northern and western European countries generated a very complex classification system, which partly matched the national standards. There are differences in the description of Scots pine wood characteristics and defects in the domestic standards and technical conditions concerning this timber trade, which is of key importance to the Polish wood industry.
Źródło:
Sylwan; 2017, 161, 10; 795-803
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modyfikacja biologicznej metody ochrony przed hubą korzeni i porównanie kosztów z metodą tradycyjną
Modification and costs of the biological control of the root rot disease as compared with the traditional method
Autorzy:
Sierota, Z.
Małecka, M.
Powiązania:
https://bibliotekanauki.pl/articles/1023394.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
choroby roslin
grzyby
biologiczne metody ochrony roslin
Phlebiopsis gigantea
huba korzeni
grunty porolne
ochrona lasu
sosna zwyczajna
lesnictwo
preparat Pg-IBL
Pinus sylvestris
drzewa lesne
pinus sylvestris
phlebiopsis gigantea
root rot
post−agricultural lands
biological control
economic assessment
Opis:
The paper describes a „dispersed treatment” concept being a modified method of biological control of the root rot (using the fungus Phlebiopsis gigantea) in stands growing on post−agricultural lands. A comparative analysis of costs incurred during the application of the traditional method and a „dispersed treatment” method is presented in the paper. It has been demonstrated that the application of the proposed method brings about a significant reduction in costs.
Źródło:
Sylwan; 2004, 148, 04; 34-39
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Formowanie sztucznych luk w celu ograniczania huby korzeni i inicjowania przebudowy monokultur sosnowych na gruntach porolnych
Creation of „artificial gaps” to reduce root rot effects and initiate reconstruction of pine monocultures established on post−agricultural land
Autorzy:
Sierota, Z.
Małecka, M.
Powiązania:
https://bibliotekanauki.pl/articles/1023951.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
zalesianie
drzewostany sosnowe
choroby roslin
huba korzeni
grunty porolne
profilaktyka
monokultury
lesnictwo
luki drzewostanowe
Heterobasidion annosum
coniferous stands
post−agricultural land
monotypic stand reconstruction
heterobasidion annosum
phlebiopsis gigantea
Opis:
It has been proposed that artificial gaps are to be established in young pine stands by cutting an appropriate number of trees around the centres of infection (1−3 dying trees) and introducing Phlebiopsis gigantea to stumps. The treatment limits or significantly reduces root rot effects in trees and the risk of dis− ease development that may follow. The initiation of the biocoenotic nature of changes in pine monocultures ensures stand conversion (reconstruction) supported with the processes of natural succession.
Źródło:
Sylwan; 2004, 148, 01; 6-11
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ warunków meteorologicznych na początek okresu wegetacyjnego lasów liściastych północno−wschodniej Polski
Impact of meteorological conditions on the onset of the growing season over broadleaved forests in northeastern Poland
Autorzy:
Bartold, M.
Bochenek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/985746.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Polska Polnocno-Wschodnia
lasy lisciaste
fenologia
okres wegetacji
poczatek okresu wegetacyjnego
warunki meteorologiczne
teledetekcja satelitarna
Znormalizowany Wskaznik Wegetacji
dane satelitarne SPOT VEGETATION
dane satelitarne Proba-V
forest monitoring
ndvi
spot vegetation
proba−v
growing season
Opis:
The paper aims at assessing the impact of meteorological conditions on the start of the growing season (SOS) over forests in north−eastern Poland. The main objective was to study which, and if so to what extent, the meteorological parameters can describe the changes of the onset of vegetation in broadleaved forests. Study area encompasses forest complexes located in north−eastern Poland, which are under the influence of maritime and continental climate characterized by a shorter vegetation period and large temperature fluctuations. In this study forest mask containing only pixels with 50% cover of broadleaved forests defined by CLC2012 was applied. The time−series of satellite images derived from VEGETATION mission were applied for determining the start of the growing season. 10−day composites of Normalized Difference Vegetation Index (NDVI) from 1999 to 2016, derived at 1 km pixel resolution were filtered with double logistic function in order to determine the SOS. The meteorological parameters such as maximum air temperature, total precipitation and surface solar radiation derived from field measurements one month before the start of the growing season were taken into account. The Pearson correlation results proved that only maximum air temperature was related to the onset of the growing season. The strength of the relations depended on the dominant trees recognized within the forest area. There were no statistically significant relations with the precipitation and solar surface radiation which could be explained by frequent clouds during the month before the SOS and not observed unfavorable conditions that could have impacted on the changes of the growing season in forests.
Źródło:
Sylwan; 2019, 163, 12; 997-1005
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany w normalizacji wielkowymiarowego drewna sosnowego w powojennych dziejach Państwowego Gospodarstwa Leśnego Lasy Państwowe
Changes in the standardisation of large-size Scots pine timber in the State Forests National Forest Holding after world war II
Autorzy:
Malinowski, Z.
Wieruszewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/987181.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
surowce drzewne
drewno sosnowe
drewno wielkowymiarowe
sortymenty drewna
normalizacja
normy polskie
historia
standardization
ordinances
softwood
large−size
Opis:
The qualitative and dimensional variability of wood material affects its possible uses for industrial purposes. Attempts to order the rules of raw material classification contributed to the introduction of qualitative and dimensional standards approved by the Polish Committee for Standardization. Large−size softwood is the main raw timber material in Poland. The adjustment of requirements and rules of raw material sorting to changing market needs was caused by the necessity of prompt reaction to technological changes. Although standards were adjusted to the EU requirements, the State Forests National Forest Holding creates the rules of large−size wood classification through the corporation legal acts – the ordinances of the General Director. The article presents the beginning of the process of large−size softwood trade standardization in Poland. It indicates the rationality of meeting the requirements of qualitative, dimensional and purpose−related classification in the era of rapid changes in the demand of the industry. After the rebirth of the Polish state, there were attempts to improve rational use of wood. This goal was achieved by introduction of the rules of assortment classification for available forms of material. Verification of wood structure defects and properties in selection of large−size assortments resulted in consecutive amendments facilitating the procedures of selection of adequate quality and thickness classes in large−size wood. This enabled gradual adjustment of assortment classification to the needs of the wood industry, which is the recipient of wood material. Due to the increasing dynamics of changes it was necessary to develop new forms of wood division and classification. The role of product standards was gradually taken over by technical conditions developed by the State Forests, which is in charge of major material resources in Poland. This form of verification of the principles of wood division and classification guarantees prompt adjustment to the needs of clients on the wood market, which are changing at an increasing rate.
Źródło:
Sylwan; 2017, 161, 04; 287-294
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena liczebności pędraków Melolonthinae w pułapkach trocinowych w uprawach sosny zwyczajnej (Pinus sylvestris L.)
Assessing the number of Melolonthinae larvae in the sawdust traps in young Scots pine (Pinus sylvestris L.) plantations
Autorzy:
Szmidla, H.
Tkaczyk, M.
Małecka, M.
Sierota, Z.
Powiązania:
https://bibliotekanauki.pl/articles/986677.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
ochrona lasu
uprawy lesne
sosna zwyczajna
Pinus sylvestris
pulapki trocinowe
szkodniki roslin
Melolonthinae
pedraki
liczebnosc
melolontha spp.
young forest plantations
root−pest monitoring
Opis:
Root−feeding insects are an increasingly studied group of herbivores, whose impact on plant productivity and are some of the most damaging forest pests in Europe. Due to the mass feeding on the roots of seedlings and older trees in young plantation and stands, Melolonthinae larvae are classified as pests, which are the most dangerous on the land dedicated to afforestation. The research was located in the Wyszków Forest District (52°43'15' N; 21°39'03' E) on the mixed coniferous and mixed deciduous forest habitats. This study evaluated sawdust traps as the method for assessing abundance of Melolonthinae larvae in Scots pine plantations established artificially from open nursery, container production, and from natural regeneration. In spring 2015 i) ‘small sawdust pits’ in rows between seedlings, and ii) pits without soil in adjacent inter−rows as control were prepared. In spring and autumn 2016, and in spring 2017 sawdust and soil from both variants of pits were sieved and Melolonthinae larvae were counted and compared. The obtained results were analyzed in two ways. The first analysis compared the occurrence of grubs in small pits with or without sawdust, while the other one analysed influence of the time of making small pits, independently for the variant with or without sawdust. The final stage was to compare the number of Melolonthinae larvae in small pits between the origin of the seedlings. We found a greater number of grubs in spring assessment than in autumn. Both kinds of small pits showed higher number of Melolonthinae larvae when compared to traditional method of ‘great pits’. The number of Melolonthinae larvae was significantly higher on the plots with container seedlings than the others. The conceptual assumptions of this alternative and environmentally safe method of ‘sawdust traps’ seems to be optimistic.
Źródło:
Sylwan; 2018, 162, 07; 590-597
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozwoj sosny zwyczajnej na terenie pozarzysk lesnych z 1992 roku w Nadlesnictwach Rudy Raciborskie i Potrzebowice
Autorzy:
Hawrys, Z.
Zwolinski, J.
Kwapis, Z.
Malecka, M.
Powiązania:
https://bibliotekanauki.pl/articles/45609.pdf
Data publikacji:
2004
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
rozwoj roslin
szkodniki roslin
odnowienia lasu
tereny popozarowe
lesnictwo
uprawy lesne
Pinus sylvestris
grzyby
czynniki chorobotworcze
owady
sosna zwyczajna
Nadlesnictwo Potrzebowice
Nadlesnictwo Rudy Raciborskie
drzewa lesne
Źródło:
Leśne Prace Badawcze; 2004, 2; 7-20
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie skuteczności preparatów z grzybem Phlebiopsis gigantea zastosowanych do zabezpieczania pniaków sosnowych na gruntach porolnych przed infekcją pierwotną Heterobasidion annosum
Comparison of efficacy of the biological preparation with some Phlebiopsis gigantea isolates used to protect Scots pine stumps against primary infection of Heterobasidion annosum on post agricultural lands
Autorzy:
Malecka, M.
Sierota, Z.
Zolciak, A.
Powiązania:
https://bibliotekanauki.pl/articles/972793.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
ochrona lasu
grunty porolne
pniaki sosnowe
choroby grzybowe
huba korzeni
Heterobasidion annosum
zwalczanie chorob roslin
biopreparaty
preparat Rotstop F
preparat Rotstop S
preparat PG Suspension
preparat Pg-IBL
skutecznosc dzialania
Phlebiopsis gigantea
rozwoj grzybow
biopreparations
scots pine
stumps
Opis:
Three products (RotstopF, RotstopS and PGSuspension) based on lyophylised spores of registered isolates of Phlebiopsis gigantea and non−registered Polish PgIBL as a control were tested in Scots pine stumps locat−ed in 3 forest regions (north−west, north, east) of Poland in autumn 2007, spring 2008 and autumn 2008. One year later the presence of: a) subcortical mycelium and b) the fruit bodies of P. gigantea, and c) symp−toms of sapwood decay were counted and compared as Biological Treatment Efficacy (BTE) index. Obtained BTE values inform that generally PgSuspension preparation was the most effective if applied in spring 2008, whereas both Rotstop preparates showed similar and compared effectiveness in all terms of application. The differences in preparation efficacy between forest regions were found.
Źródło:
Sylwan; 2012, 156, 07; 526-532
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rola poszczególnych gatunków drzew w kształtowaniu złożonej budowy pionowej w starodrzewach liściastych Puszczy Niepołomickiej
Role of tree species in the formation of a complex vertical structure of deciduous old-growth forests in the Niepolomice Forest
Autorzy:
Bartkowicz, L.
Kołodziej, Z.
Pach, M.
Powiązania:
https://bibliotekanauki.pl/articles/989716.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
starodrzew
struktura drzewostanu
struktura wysokosci
drzewa lesne
gatunki lasotworcze
Puszcza Niepolomicka
oak−hornbeam forest
riparian forests
structural diversity indices
ecological mechanisms
Opis:
The objective of the study was to compare the seven tree species in terms of their role in the formation of a complex vertical structure in mixed broadleaved stands. The data came from 18 multi−storey old−growth forests representing different communities of lowland deciduous forests in the Niepołomice Forest. In each stand, squared sample plot (80×80 m) was established. The height of trees of dbh≥7 cm was measured. Then, for each studied species, values of the two structural indices were determined. The structural diversity index (ZS) quantifies tree height variation within individual population, whereas the index of structure−forming role (RS) expresses the contribution of the given population into vertical structural diversity of the whole stand. The greatest tendency to form a population with a large height diversity belonged to Tilia cordata, Fraxinus excelsior and Ulmus laevis. Significant opportunities in this regard, however, were exhibited by other tree species, including shade−intolerant Pinus sylvestris and Alnus glutinosa. This phenomenon in the conditions of eutrophic habitats, with the constantly present competitive pressure from shade−tolerant species, should be considered as an exceptional. A major contribution to vertical structural diversity of the stand was often an attribute of the populations with a low internal height diversity, which concerned especially Quercus robur. This means that an important ecological mechanism responsible for the formation of a multi−layer canopy is complementary filling the space above ground by trees of the species with different light requirements. However, the lack of correlation between RS and ZS indices suggests that the ability of particular species to form the population with a high internal diversity is equally important. The results prove the possibility of forming stands with a very complex vertical structure in the conditions of lowland mixed deciduous forests. However, in terms of sustainable maintenance of such stand structure, the issue of the growth rate of trees at different competitive pressure and the nature of their response to the release at different stages of ontogeny remains open.
Źródło:
Sylwan; 2015, 159, 08; 650-657
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ zastosowania trocin w uprawie jednorocznej sosny zwyczajnej na liczebność pędraków chrabąszczy
Effect of sawdust addition into one-year-old Scots pine plantation on number of Melolontha grubs
Autorzy:
Małecka, M.
Sierota, Z.
Tarwacki, G.
Powiązania:
https://bibliotekanauki.pl/articles/991161.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
ochrona lasu
zakladanie upraw
uprawy sosnowe
zabiegi ochronne
trociny
stosowanie doglebowe
wymieszanie trocin z gleba
szkodniki roslin
wystepowanie
chrabaszcz
Melolontha
pedraki
liczebnosc
sadzonki
przezywalnosc
melolontha
frequency
scots pine
seedlings
mortality
sawdust
soil
Opis:
Number of Melolontha grubs in forest soils reforested with Scots pine (Lubartów A, LA, Lubartow B, LB) and those in post agricultural soils afforested with this species (Swierczyna, SW) were assessed before (autumn 2011, spring 2012) and one year after (2013) planting. At the same time, mortality of seedlings was evaluated on both study sites. Pine sawdust was mixed with soil in rows (treatment T1) or applied under seedling roots just before planting in April 2012 (treatment T2). In May 2013, seedling mortality varied significantly, from 27.5% in LB to 51.0% in LA, whereas the differences between the treatments were not significant. The mean number of Melolontha grubs decreased from 35/0.15 m³ of soil in autumn 2011 to 3/0.15 m³ in spring 2012 and in spring 2013. The differences depended on the site, treatment and grubs spatial distribution in soil. Addition of sawdust did not influence either seedlings, or insects mortality. T2 was more beneficial for Scots pine seedlings growing on agricultural soils, while treatment T1 – for those on forest soils. On the other hand, pine sawdust applied under roots of the seedlings seemed to attract Melolontha spp. grubs.
Źródło:
Sylwan; 2014, 158, 08; 604-613
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamika zmian liczby harwesterów w Polsce oraz czynniki determinujące ich występowanie
Dynamics of harvester fleet change in Poland and factors determining machine occurrence
Autorzy:
Mederski, P.S.
Karaszewski, Z.
Rosińska, M.
Bembenek, M.
Powiązania:
https://bibliotekanauki.pl/articles/989504.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
technika lesna
mechanizacja prac lesnych
pozyskiwanie drewna
maszyny lesne
harwestery
liczba maszyn
rozmieszczenie przestrzenne
powierzchnia lasow
pozyskanie drewna
siedliska lesne
regionalne dyrekcje Lasow Panstwowych
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
ctl technology
forest enterprises
coniferous species
broadleaved species
Opis:
W Polsce oraz czynniki determinujące ich występowanie. Sylwan 160 (10): 795−804. In recent years, rapid changes related to forest operations have been observed in the forestry sector in Poland. A growing number of harvesters, an increased volume of harvested timber and a larger proportion of broadleaved species are considered the most important. The objective of this paper was to recognise the dynamics of harvester fleet change in Poland. In particular, there was an emphasis on finding out: 1) the total number of harvesters currently used in Poland (with respect to regions), 2) where and what type of machines were bought, and 3) which main factors influence the occurrence of these machines. In January 2014, a survey was sent to all forest districts. Questions related to harvesters and relevant for this paper included information about: 1) the number of harvesters in use, 2) the serial number of each harvester, 3) place of purchase (within the country or abroad), 4) status of the machine when bought (new or used), and 5) the forest district, in which an open tender was won for 2014. To avoid double counting the same harvester working in two or more forest districts, the serial number of each machine was used for identification. There were 368 harvesters reported in the survey in early 2014, although at the end of 2015 this number rose to 530 machines. The Central−West, North−West and North of Poland had the highest number of harvesters. Most of the harvesters were bought as used, though there may be a growing trend towards the purchase of new machines. A strong correlation was observed between the number of machines used in a region and the total area of lowland coniferous sites and forests, as well as the volume of harvested merchantable softwood. Currently, private forests and broadleaved species are the main factors limiting the application of harvesters in Poland.
Źródło:
Sylwan; 2016, 160, 10; 795-804
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przebieg choroby w uprawie sosny zwyczajnej w nastepstwie sztucznej inokulacji pniakow grzybnia korzeniowca wieloletniego
Spread of the disease in the scots pine plantation as a result of the artificial inoculation of stumps with mycelium of Heterobasidion annosum
Autorzy:
Zolciak, A.
Sierota, Z.
Malecka, M.
Powiązania:
https://bibliotekanauki.pl/articles/46141.pdf
Data publikacji:
2006
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
inokulacja sztuczna
pniaki
lesnictwo
uprawy lesne
Pinus sylvestris
drzewostany sosnowe
choroby roslin
czynniki chorobotworcze
grzyby
huba korzeni
sosna zwyczajna
Heterobasidion annosum
fitopatologia lesna
drzewa lesne
Źródło:
Leśne Prace Badawcze; 2006, 1; 37-55
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Submisje jako kierunek dystrybucji cennego surowca drzewnego
Submissions as a trend in the distribution of valuable wood material
Autorzy:
Malinowski, Z.
Lis, W.
Wieruszewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/989513.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
RDLP Katowice
drewno
sprzedaz
drewno cenne
submisje
rynek drzewny
round wood
valuable species
sales
recipient market
submissions
Opis:
The sales of round wood is determined by the forms of distribution, which are specific to the Polish market. The State Forests, National Forest Holding is the enterpise that has the main potential (forest area – 75% and sales – 95%) of wood material at its disposal. In pursuit of rational use of the quality of acquired round wood and in order to increase its price, the State Forests decided to sell high quality assortments in the systems of auction and submission. It is economically important both for the State Forests and for Poland, because the income from the sales of wood makes about 88% of total income of this strategically important institution in the national economy. Systematic changes in the structure of recipients confirm the right trend and distribution of round wood.
Źródło:
Sylwan; 2016, 160, 07; 531-538
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka leśnego okresu wegetacyjnego w Polsce na podstawie wybranego scenariusza zmian klimatu
Characteristics of the forest growing season in Poland on the basis of selected scenario of climate changes
Autorzy:
Dragańska, E.
Szwejkowski, Z.
Cymes, I.
Panfil, M.
Powiązania:
https://bibliotekanauki.pl/articles/987189.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Polska
lasy
okres wegetacji
dlugosc okresu wegetacji
zmiany klimatyczne
scenariusze zmian klimatu
forest vegetation period
climate changes
Opis:
The paper presents comparative characteristics of the length as well as start and end dates of the forest vegetation period (FVP) in the years 1981−2010 determined on the basis of the average daily air temperature and data generated for the conditions of two−fold higher CO2 concentration. To simulate meteorological data for that conditions, we applied the WGENK data generator, considering assumptions of GISS Model E scenario of climate change. The results showed that the average start date of FVP in Poland in the period of 1981−2010 was April 25th, while the average end date of FVP was October 10th. The average length of FVP for Poland equalled 165 days. It was discovered that, on average, the FVP start accelerated by 8 days per 30 years and the FVP end was slightly delayed by 3 days per 30 years. During the analyzed period, the FVP in Poland extended by 10 days on average. According to the applied scenario of the climate change, the trend indicates a possible increase in the FVP by 30 days when compared to the present state. The FVP may start 2−3 weeks earlier and finish 1−2 weeks later than presently. The generated data pointed at April 9th as the average date of the FVP start and October 24th as the date of its end.
Źródło:
Sylwan; 2017, 161, 04; 303-311
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 37

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