Temat: jesion wyniosly - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Struktura drewna jesionu wyniosłego (Fraxinus excelsior L.) a proces zamierania drzewostanów jesionowych
Wood structure of European ash [Fraxinus excelsior L.] and process of ash stands decline
Autorzy:: Tulik, M.
Powiązania:: https://bibliotekanauki.pl/articles/1009693.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: transport wody
drewno jesionowe
drewno wtorne
struktura drewna
jesion wyniosly
Fraxinus excelsior
lesnictwo
wydajnosc
zamieranie drzew
drzewa lesne
fraxinus excelsior
decline
hydraulic conductivity
secondary wood
Opis:: The paper describes ash decline process that has been observed for over 10 years in Europe and North America. Effect of both biotic and abiotic factors is discussed. Also, the vessel lumen reduction in wood is described as a possible factor responsible for declining of ash trees.
Źródło:: Sylwan; 2009, 153, 10; 662-667
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Strukturalne i funkcjonalne modyfikacje drewna pni zamierających jesionów (Fraxinus excelsior)
Structural and functional modifications in xylem of declining European ashes (Fraxinus excelsior)
Autorzy:: Tulik, M.
Marciszewska, K.
Powiązania:: https://bibliotekanauki.pl/articles/991513.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
drzewa lesne
jesion wyniosly
Fraxinus excelsior
zamieranie drzew
drzewa zamierajace
drzewa zdrowe
sloje przyrostu rocznego
szerokosc
drewno wczesne
zmiany strukturalne
zmiany funkcjonalne
fraxinus excelsior
decline
earlywood vessels
hydraulic conductivity
tree−ring
Opis:: The anatomy and functioning of stem secondary xylem in relation to the decline of European ash (Fraxinus excelsior L.) was examined and the hypothesis that declining trees show changes in the structure of wood, resulting in impaired water transport was tested. Anatomical analyses were carried out on samples comprising annual rings formed between 1970 and 2009 and collected at the breast height of the main stem of fifteen trees 40−90 years old. Trees were based upon health condition and classified as healthy, weakened or dead. Tree−ring widths as well as diameter and density of earlywood vessels were measured and the theoretical hydraulic conductivity index through the secondary xylem calculated by application of Hagen−Poisseuille formula. Over the whole investigated period the smallest early vessels were attribute to ashes dead at the time of sampling. In the period when dieback symptoms where manifested in the stand, the diminishment of vessels diameter occurred in weakened and eventually dead trees, whereas healthy trees produced even slightly larger vessels than before. Having large vessels implies that healthy trees were able to keep high hydraulic conductivity index, whereas trees in decline at this time produce smaller vessels and hence had reduced conductivity in respect to previous.
Źródło:: Sylwan; 2013, 157, 04; 288-297
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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