Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "miazszosc drewna" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 22
Tytuł:
Ocena dokładności określenia zasobności drzewostanów w obrębowej metodzie inwentaryzacji zapasu
Accuracy assessment of stand volume determination in district inventory method
Autorzy:
Nowakowska, J.
Wójcik, R.
Sierdziński, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1009395.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
urzadzanie lasu
drzewostany
zasobnosc drzewostanu
zapas drewna
inwentaryzacja lasu
metoda obrebowa
miazszosc drzew
cechy taksacyjne
dokladnosc pomiaru
district inventory method
volume
inventory features
Opis:
The research revealed an increase in accuracy of stand volume determination at induvidual stand and groups of stands level. Errors appeared in determination of such features as stand quality class, average diameter breast high of stand, average height and stocking index.
Źródło:
Sylwan; 2010, 154, 08; 535-544
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany miazszosci i udzialu klas jakosci drewna wielkowymiarowego sosnowego w zaleznosci od rodzaju manipulacji dluzyc
Changes in the volume and proportion of large-sized pine wood quality classes in relation to the type of log manipulation
Autorzy:
Witkowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/45906.pdf
Data publikacji:
2010
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
surowce drzewne
drewno sosnowe
drewno wielkowymiarowe
dluzyce
klody
srednica
miazszosc drewna
Źródło:
Leśne Prace Badawcze; 2010, 71, 3; 311-314
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wydajność pozyskania drewna przy pomocy harwesterów i pilarki spalinowej
Productivity of timber harvest with the use of a harvester and a chainsaw
Autorzy:
Dvorak, J.
Walczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/991973.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany swierkowe
miazszosc drzew
pozyskiwanie drewna
wydajnosc pracy
harwestery
pilarki spalinowe
productivity
productivity standards
harvester
diesel chainsaw
Opis:
Changes in the performance of harvesters of different power classes depending on the size of felled trees in thinned stands were assessed using a time study method. Results were compared to values from the catalogue for chainsaw performance. Comparison of the productivity of these two ways of harvest indicated that, depending on the volume of the felled tree, it was 6−8.2 times higher for harvesters. However, significant differences in productivity between harvester classes were also found. For felling trees with sizes up to 0.07 m 3 , the productivity of a small−power harvester is about 30% higher than that of a medium and high−power ones.
Źródło:
Sylwan; 2013, 157, 03; 171-176
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Martwe drewno – żywy problem
Dead wood - a living problem
Autorzy:
Czerepko, J.
Hilszczanski, J.
Jablonski, M.
Powiązania:
https://bibliotekanauki.pl/articles/881687.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:
lasy
roznorodnosc biologiczna
saproksyle
drewno martwe
ilosc drewna martwego
miazszosc
inwentaryzacja lasu
inwentaryzacja wielkopowierzchniowa
Źródło:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2014, 16, 4[41]
1509-1414
Pojawia się w:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena dokładności określania miąższości kłód przez harwestery wyposażone w system Opti4G
Evaluation of logs, volume determination by harvesters equipped with Opti4G software
Autorzy:
Tomusiak, R.
Ludwisiak, L.
Moskalik, T.
Golebiowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/882705.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:
lesnictwo
pozyskiwanie drewna
klody
miazszosc drewna
pomiary
harwestery
wyposazenie techniczne
systemy pomiarowe
system Opti4G
dokladnosc pomiaru
bledy pomiarowe
Źródło:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2014, 16, 2B[39]
1509-1414
Pojawia się w:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zasoby martwego drewna leżącego w drzewostanach sosny zwyczajnej i sosny czarnej na wydmach nadmorskich w rezerwacie "Mierzeja Sarbska"
Coarse woody debris in European black pine and Scots pine stands in "Sarbska Spit" Forest Reserve
Autorzy:
Tomusiak, R.
Mostrag, A.
Kedziora, W.
Wilczak, A.
Dominiecki, A.
Lecyk, M.
Wojtan, R.
Powiązania:
https://bibliotekanauki.pl/articles/882362.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:
lesnictwo
drzewostany sosnowe
sosna zwyczajna
Pinus sylvestris
sosna czarna
Pinus nigra
drewno martwe lezace
lezanina
miazszosc
ilosc drewna martwego
rezerwaty przyrody
rezerwat Mierzeja Sarbska
Źródło:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2014, 16, 4[41]
1509-1414
Pojawia się w:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problematyka pomiarów oraz określania miąższości martwego drewna na kołowych powierzchniach próbnych
Measurement and calculation of the volume of deadwood on circular sampling plots
Autorzy:
Bujoczek, L.
Powiązania:
https://bibliotekanauki.pl/articles/989747.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
powierzchnie probne kolowe
drewno martwe
miazszosc drewna
pomiary drewna
metody pomiarow
coarse woody debris
snags
shape
decomposition
field methods
volume determination
Opis:
The paper analyzes two methods of deadwood (DW) measurements on circular sampling plots. In the first method, the volume of DW is measured within the circumference of the sampling plot irrespective of the fact whether the live tree was located inside or outside the plot. The other method requires the measurement of only that DW, which can be attributed to trees that originally grew within the sampling plot. This requires identification all debris fragments originating from those trees both within and outside the sampling plot. Additionally, the paper compares the results obtained using Smalin's and Huber's formulas and discusses the influence of decomposition stage on the calculated volume of lying deadwood. Measurements were conducted in two stands. In each of them 20 circular sampling plots (4 or 5 ares) were established. In both stands, the second investigated measurement method led to a lower mean DW volume (by 6.3% and 27.2%). In practice, it was very difficult to identify DW from the outside of the sampling plots as high trees growing close to the plot had their fragments lying up to several dozen meters away. If a tree was very fragmented upon falling, it was difficult to find all the relevant pieces of DW and determine whether they derived from the sampling plot or not. The volume of lying DW calculated according to Smalin's formula was by 5% higher. In case of 7.7% of the 194 inventoried fragments of lying DW the transverse cross−section changed from circular to misshapen. The application of formulas accounting for decomposition decreased the calculated volume of lying DW by 5.1%. Taking into consideration the time−effectiveness and accuracy of measurements, it has been found that for most stands the best method is to measure the ends of DW pieces, calculating the length of segments from polar coordinates (using the measurement principles presented in the figures). In addition, especially in measuring large trees, one should take into account changes in shape attributable to decomposition, which may influence the calculation of DW volume. It is recommended that all DW fragments within a circular sampling plot should be measured irrespective of whether the tree from which they derive grew inside or outside the plot.
Źródło:
Sylwan; 2015, 159, 10; 795-803
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena zasobów martwego drewna w lasach gospodarczych z względnieniem typów siedliskowych lasu oraz bonitacji gatunku panującego
Effect of site conditions and site index for the dominant tree species on the amount of deadwood in managed forests
Autorzy:
Bujoczek, L.
Zięba, S.
Banaś, J.
Powiązania:
https://bibliotekanauki.pl/articles/989223.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
lasy gospodarcze
drewno martwe
miazszosc drewna
warunki siedliskowe
typy siedliskowe lasu
bonitacja siedliska
coarse woody debris
snag
volume
site productivity
fertility
moisture
Opis:
The work studied the effects of site conditions on the amount of deadwood (DW) in managed forests in south−western Poland. Measurements included standing dead trees, snags with a diameter at breast height of at least 7 cm, and lying deadwood (logs, branches, uprooted trees, etc.) with a diameter at the thicker end of at least 10 cm. The study excluded snags and deadwood pieces with a diameter of less than 7 cm as well as stumps. Site conditions are presented according to the Polish site classification system taking into account both site fertility and water abundance. With respect of the fertility gradient, sites are classified as dystrophic, oligotrophic, mesotrophic, and eutrophic. In terms of water abundance, there are two types of sites: mesic (low or very low contribution of groundwater, rainwater, and floodwater, with an approximate springtime water table depth of more than 1.8 m) and moist (moderate or considerable contribution of groundwater, rainwater, and floodwater, with an approximate springtime water table depth of 0.5−1.8 m). We analyzed data from 2522 sampling plots with area ranging from 50 to 500 m² and depending on forest stand age. The plots were established in forest stands older than 21 years old. The predominant tree species in the study area were Pinus sylvestris, Quercus robur, Quercus petraea, Betula pendula, Fagus sylvatica, Alnus glutinosa, Fraxinus excelsior and Picea abies. In a separate analysis of data from 233 sampling plots, we studied the relationship between DW volume and the site index evaluated using a five−level classification (level I denotes sites with the highest productive capacity). Forest stands aged >80 years with the dominance of Pinus sylvestris were studied. The study showed a significant influence of site conditions on the DW volume in managed forests. Forest stands exhibiting better site conditions not only provided more timber, but also contributed with a greater amount of deadwood to the ecosystem. Forest stands with a site index of I contained as much as 4.9 m³ of DW/ha, while stands with a site index of III only 2.4 m³ of DW/ha. In terms of the 8 studied site types, it was also found that the average volume of DW increased with site fertility. The lowest volume of DW occurred on very nutrient−poor and mesic sites (0.6 m³/ha). In contrast, nutrient−rich and moist sites contained 15 times as much DW (9.5 m³/ha). Of paramount importance was water abundance. The volume of DW on moist sites was on average by 2.2−4.5 m³/ha higher than on mesicsites with the same fertility.
Źródło:
Sylwan; 2016, 160, 04; 320-327
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zasoby oraz zróżnicowanie martwego drewna w uroczysku Wapienny Las w Nadleśnictwie Polanów
Quantity and diversity of deadwood in the Wapienny Las forest
Autorzy:
Bujoczek, L.
Bujoczek, M.
Powiązania:
https://bibliotekanauki.pl/articles/989321.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Nadlesnictwo Polanow
drzewostany
uroczysko Wapienny Las
drewno martwe
ilosc drewna martwego
miazszosc drewna
stopien rozkladu drewna
coarse woody debris
snag
volume
decay stage
size classes
managed forest
biodiversity
Opis:
Managed forests, which account for the vast majority of woodland areas in Poland, play a major role in preserving biodiversity. The objective of this work was to determine the diversity of woody microsites in a managed forest covering 27 ha of land in Polanów Forest District (north−western Poland). The study was conducted in 2014 on 20 sampling plots with an area of 0.04 ha each. An inventory of deadwood was conducted involving standing dead trees, snags, stumps, and lying deadwood with a diameter of at least 7 cm (in the case of standing deadwood, the diameter was measured at breast height). Deadwood was classified according to a five−level decay scale. The studied forest was found to contain an average of 26.9 m³/ha of deadwood from several tree species. Lying deadwood accounted for 17.3 m³/ha, standing dead trees for 0.9 m³/ha, snags for 4.9 m³/ha, and stumps for 3.8 m³/ha. Deadwood in all decay stages was identified. The most abundant category of deadwood was moderately decomposed wood in decay stage III (31.3%), followed by decay stage II (24.4%), and decay stage IV (19.7%). Deadwood (both standing and lying) was also very diverse in terms of piece diameters. The diameter at breast height of standing dead trees was up to 26 cm, and that of snags up to 50 cm. The thickest pieces of lying deadwood were 48 cm in diameter. However, pieces of less than 35 cm in diameter accounted for 96% of the total volume of lying deadwood. The volume of deadwood in the studied forest stand was very large, much higher than the average for Polish forests in general (5.8 m³/ha). Deadwood was highly varied and contributed to a substantial diversity of organisms that depend on it, as shown by previous research. Wapienny Las is an example of a managed forest that plays an important role in preserving woodland biodiversity.
Źródło:
Sylwan; 2016, 160, 06; 482-491
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dokładność wybranych metod określania miąższości drewna sosnowego wyrabianego w kłodach
Accuracy of selected methods of the determination of Scots pine logs volume
Autorzy:
Giedrowicz, A.
Staniszewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/988966.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
uzytkowanie lasu
surowce drzewne
drewno sosnowe
klody
miazszosc drewna
metody obliczeniowe
dokladnosc
bledy systematyczne
forest utilization
timber sell
timber measurement
systematic errors
Opis:
In 2015, approximately 38.5 million m³ of round wood was harvested in Poland, and this volume is constantly growing. Scots pine (Pinus sylvestris L.) occupies about 58.5% of the forest area in Poland and is the species of the most economic importance. Along with the changes in the timber market, mainly due to the development of technology for the harvesting and processing of wood raw materials, the consumers interest in stem wood has increased. The State Forests in Poland have developed their own system for timber volume calculation that is based on the measurement of the under−bark diameter at the thinner end of the log. The aim of the study was to evaluate the accuracy of three methods of determining the harvested timber volume: Huber's and Smalian's dendrometric formulas and the method currently used by the State Forests. The study was conducted in the Choczewo Forest District (N Poland). In total, 193 logs collected from five forest ranges and from two forest habitats (fresh mixed broadleaved and fresh mixed coniferous forest) were measured. The relative error calculated as the relative difference between log volume obtained by the dendrometric formula and the real volume determined with section−wise method was statistically analysed. Mean errors obtained with all tested methods of volume determination differ significantly from zero, which indicates the systematic error of volume determination. The greatest errors are generated by the method used by the State Forests. The volume obtained with this method is underestimated on average by over 14%.
Źródło:
Sylwan; 2017, 161, 11; 892-897
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inwentaryzacja martwego drewna statystyczną metodą reprezentacyjną z zastosowaniem warstw gatunkowo-wiekowych
Inventory of deadwood by the means of a statistical representative sampling method using species-age layers
Autorzy:
Bujoczek, L.
Bujoczek, M.
Banaś, J.
Zięba, S.
Powiązania:
https://bibliotekanauki.pl/articles/989002.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drewno martwe
miazszosc drewna
zasoby drzewne
szacowanie zasobow
metody statystyczne
typy siedliskowe lasu
gatunki panujace
wiek drzewostanu
coarse woody debris
snags
measurements
accuracy
Opis:
According to the current forest management manual, deadwood volume should be evaluated on 10% of sampling plots, located in different species−age layers, which are used for determining stand volume in a given forest unit. Sampling plot size differs depending on tree stand age and ranges from 0.005 to 0.05 ha. The results are reported for the entire forest district and by forest site type. The objective of the study was to analyze the accuracy of deadwood volume estimations in the light of the guidelines stipulated in the forest management manual and to find the ways to improve the obtained results. Deadwood volume was measured on 2752 sample plots used to determine stand volume and the mean value calculated on that basis was 5.4 m³/ha. Subsequently, 30 random draws of sampling plots were performed. Estimates based on randomly selected pools consisting of 10% of sampling plots ranged from 3.5 to 8.6 m³/ha. Subsequently, another 10% of sampling plots were randomly drawn and added to the previous ones. The results for 20% of sampling plots were 4.5−7.0 m³/ha, for 30% – 4.3−6.4 m³/ha, for 40% – 4.6−6.4 m³/ha and for 50% – 4.7−6.0 m³/ha. In the next step, 225 sampling plots located in reserves and special zones around the nests of protected species were discarded. The mean volume of deadwood computed for the managed forest areas alone (2527 sample plots) was 4.7 m³/ha. The random drawing procedure was repeated to give the following results: 3.6−6.8 m³/ha for 10% of sampling plots; 3.8−5.8 m³/ha for 20%; 3.9−5.3 m³/ha for 30%; 4.2−5.3 m³/ha for 40%; and 4.2−5.1 m³/ha for 50% of sampling plots. The categorization of the randomly selected sampling plots by forest site type in most cases yielded results significantly differed from the values computed based on all sampling plots. It was found that estimates based on 10% of sampling plots may diverge considerably from true values due to the uneven distribution of deadwood. In particular, managed and unmanaged forest areas should not be combined due to the high differences in the volume of deadwood between them. If a relatively low number of sampling plots is used, it seems advisable to report results only for the forest division as a whole, without a breakdown into site types. Satisfactory estimates for the different forest sites types would require much more work. The use of a greater number of sampling plots than specified in the forest management manual seems to be a fundamental prerequisite for improving the accuracy of deadwood volume estimates.
Źródło:
Sylwan; 2017, 161, 02; 114-123
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zależność wybranych cech drzewostanów od położenia nad poziomem morza na przykładzie Parku Narodowego Gór Stołowych
Dependence of selected stand characteristics on the elevation on the example of the Stolowe Mountains National Park
Autorzy:
Miścicki, S.
Szneidrowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/989003.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
lasy gorskie
Park Narodowy Gor Stolowych
dynamika drzewostanu
miazszosc drzew
miazszosc drewna
zasobnosc drzewostanu
zageszczenie drzew
przyrost miazszosci
czynniki siedliska
wysokosc nad poziomem morza
current volume increment
elevation zone
forest renewal
net changes in standing volume
tree density
Opis:
The elevation is used to illustrate the differences in the structure and growth of mountain forests. The aim of the study was to determine (1) whether the characteristics used to describe the condition and structure of forest stands under protection status (volume of merchantable timber, tree density, total height of trees in the regeneration layer, volume of dead stems, current annual volume increment, volume of dead trees, periodic changes in standing volume) change at the same rate along with the elevation, and (2) whether in mountains without upper montane zone, the values of the selected characteristics of stands located in the highest elevation zone decrease at a low rate with elevation and are comparable to the stands at the same elevation in higher mountains ranges. The study was located at an elevation of 400−909 m a.s.l. in the Stołowe Mountains National Park (PNGS; SW Poland). We used data from the measurements performed in 2009 and 2014 on 358 permanent sample plots. Plots were assigned to one of five elevation zones of 100 m a.s.l. We assumed that the characteristic value decreased with the increase in the elevation, and that such change was the same for all stand characteristics. This hypothesis was verified using the ANOVA for the repeated samples. The calculations were based on standardized values of the characteristics measured on individual sample plots. The higher above sea level the plot was located, the greater share of spruce in the stand (fig. 1). The standing volume (fig. 2), trees density (fig. 3) and current annual volume increment (fig. 6) decreased with elevation, while the volume of dead stems (fig. 4) increased. The net changes in standing volume (fig. 8) were the smallest in the stands located at the lowest and at the highest zone (400−499 and 800−909 m a.s.l.). No significant relationship was found between the total height of trees in the regeneration layer (fig. 5) or the volume of dead trees in the period 2009−2014 (fig. 7) and the elevation. Individual characteristics differed in the rate of changes of their values with elevation (fig. 9). The structure of stands growing at the highest elevation was the most variable. These stands were rather a substitute for the upper montane zone forests. The rate of the observed decrease of the volume of merchantable timber, tree density and current volume increment in the stands of PNGS was higher than in other forests in the Polish mountains.
Źródło:
Sylwan; 2017, 161, 02; 131-141
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamika zasobów martwych drzew w ścisłym rezerwacie przyrody Świnia Góra
Dynamics of the dead wood resources in the Swinia Gora strict nature reserve
Autorzy:
Mielczarczyk, J.
Miścicki, S.
Lepa, A.
Powiązania:
https://bibliotekanauki.pl/articles/985781.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
rezerwaty przyrody
rezerwat Swinia Gora
rezerwaty scisle
drzewa martwe
drzewa martwe lezace
drzewa martwe stojace
stopien rozkladu drewna
zasoby drzewne
drzewa zywe
miazszosc drzew
dynamika zasobow
decay stage
decomposition
log
replenishment
silver fir
snag
stump
Opis:
The aim of the study was to characterize the state and dynamics of dead wood resources in the stands of the Świnia Góra strict forest reserve, which was excluded from use for a longer period of time (from 1938/1953), and to compare the results with the state and dynamics of living trees resources. The reserve covers 51 hectares of an upland forest in the Świętokrzyska Forest (central Poland). Data was collected in 2000, 2007 and 2014 on 95 systematically distributed 500 m2 sample plots. The location and dimensions of living trees, standing dead trees (snags, including stumps) and downed trees (logs) on each sample plot were determined and measured. The decay stages of dead wood were estimated using a four−point scale classification. The average volume of dead wood was 198 ±32 m3/ha (43 ±8% of living trees) in 2000 and 138 ±17 m3/ha (24 ±3%) in 2014 (fig. 1). The ratio of the volume of snags to logs decreased from 30 ±5% in 2000 to 24 ±6% in 2014. Silver fir was the dominant species among both living and dead trees (fig. 2). The share of dead wood volume in decay stages 1 and 2 was the highest among snags, while in stages 2 and 3 – among logs. The number of highly decomposed wood increased in the period 2000−2014 (fig. 3). The decay rate of wood calculated over a 7−year period was more rapid for logs (fig. 4). In the period of 14 years, 119 ±23 m3/ha of dead wood underwent a complete decomposition. Volume of trees that died within that period was 59 ±10 m3/ha (fig. 5). The complete decomposition of snags amounted to 64 ±10% and logs to 58 ±5% of the initial dead wood volume. The dead wood resources in the investigated period were not balanced: the amount of decayed wood was larger than the amount of wood replenishing the resources. The lack of this balance was due to the lack of the balance of living trees – dead wood resources were insufficiently replenished by trees that had died during analysed 14 years. The dead wood resources at a level of approximately 200−230 m3/ha might be balanced via their continuous replenishment by newly died trees in the amount close to the current volume increment.
Źródło:
Sylwan; 2018, 162, 04; 295-304
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 22

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies