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Wyszukujesz frazę "Bijak, J." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Sekwoja
Sekvoja
Sequoia
Autorzy:
Brenner, J.
Bijak, R.
Powiązania:
https://bibliotekanauki.pl/articles/811908.pdf
Data publikacji:
1977
Wydawca:
Polskie Towarzystwo Leśne
Źródło:
Sylwan; 1977, 121, 04
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wielkość i wartość zasobów surowca drzewnego robinii akacjowej i daglezji zielonej w Lasach Państwowych
Amount and value of black locust and Douglas fir timber resources in the State Forests in Poland
Autorzy:
Jamińska, J.
Bronisz, K.
Bijak, S.
Powiązania:
https://bibliotekanauki.pl/articles/985871.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Panstwowe Gospodarstwo Lesne Lasy Panstwowe
zasoby drzewne
robinia akacjowa
Robinia pseudoacacia
daglezja zielona
Pseudotsuga menziesii
wartosc lasu
surowce drzewne
wartosc pieniezna
forest value
forest resources
robinia pseudoacacia
pseudotsuga menziesii
Opis:
The objective of the study was to determine the quantitative and valuable potential of wood resources of black locust (Robinia pseudoacacia) and Douglas fir (Pseudotsuga menziesii) in individual regional directorates of the State Forests (RDSFs) in Poland. We used data from the State Forests Information System database (values for the end of 2014) to determine the amount of the resources of the analysed species in forests under the State Forests management. The monetary value of black locust and Douglas fir resources was determined using both the indicator method and on the basis of sales prices of individual assortments. The occurrence, and hence the resources of black locust and Douglas fir in our country are characterized by considerable spatial diversity. Generally speaking, studied tree species are of minor importance in Polish forests as far as area and volume are concerned, but both species can the most often and in the large abundance be found in the western and northern Poland. The average sale price of wood of the tested species varied a lot in individual regional directorates of the State Forests (fig.). In the case of black locust the average sale price ranged from 99 PLN/m3 in RDSF Szczecinek to 151 PLN/m3 in RDSF Krakow, while for Douglas fir the values from 59 PLN/m3 in RDSF Łódź to 277 PLN/m3 in RDSF Katowice were obtained. The total value of black locust timber resources was assessed by the sale price method at PLN 262.4 million, and by the indicator method at PLN 186.4 million. In the case of Douglas fir timber, these values were much higher and amounted to PLN 375.0 and 309.2 million, respectively. The highest value of the studied species stands was noted in the RDSF with the largest amount of their resources.
Źródło:
Sylwan; 2018, 162, 09; 737-744
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kształtowanie się przyrostu grubości jodeł z Gór Świętokrzyskich
Radial increment of silver fir from the Swietokrzyskie Mts.
Autorzy:
Bruchwald, A
Dmyterko, E.
Bijak, S.
Łukaszewicz, J.
Niemczyk, M.
Wrzesiński, P.
Powiązania:
https://bibliotekanauki.pl/articles/989406.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
sloje przyrostu rocznego
analiza dendrochronologiczna
Gory Swietokrzyskie
drzewostany jodlowe
jodla pospolita
Abies alba
przyrost drzew
przyrost grubosci
przyrosty radialne
czynniki srodowiska
czynniki klimatyczne
zanieczyszczenia przemyslowe
abies alba mill.
tree−rings
increment reduction
increment release
disturbances
Opis:
The paper presents the dendrochronological analysis of silver firs (Abies alba Mill.) growing in the canopy layer of the forest stands. We searched for the similarities in the rhythm of radial growth of studied trees and we analysed the response of these stands to the increment disturbances related to the occurrence of adverse climatic factors and the pressure from industrial pollution. The research material was collected in 30 pure and uneven−aged silver fir stands located in the Świetokrzyskie Mountains (central Poland). We investigated the effect of age of the stands and the conditions for their growth (location, forest habitat type) on an average tree−ring width. In order to detect similarities in the rhythm of radial growth of the surveyed stands, we grouped the raw chronologies by the means of the cluster analysis, using Ward's agglomeration procedure with 1−r distance (r – Pearson correlation coefficient). We assessed the incremental response of the investigated stands to the disturbances (situations of significantly reduced radial growth) using indicators of resistance, recovery and resilience proposed by Lloret et al. [2011]. We also studied the influence of the stand age and the forest habitat type on the response of analysed for stands to the detected disturbances. The shortest chronology consisted of 94 tree−rings, while the longest one of 137. Average length of the obtained silver fir chronologies was 119 years. Older fir stands characterised with narrower rings (r=–0.451, p=0.012). Neither the location, nor the forest habitat type are the factors determining the similarity of the rhythm of radial growth of silver firs from the Świętokrzyskie Mountains (p=0.243 and p=0.967 respectively). The extreme climatic conditions responsible for the majority of the short−term (one−year−long) incremental depressions are the factor of regional importance, which affects the growth of investigated trees. Older stands characterized with better possibilities of increment recovery after the disturbance than younger stands (p<0.001), which may be a result of the production of secondary crowns. No consistent differences in the indices of resistance and resilience were found among analysed stands.
Źródło:
Sylwan; 2016, 160, 11; 893-904
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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