Temat: wskaznik R-S - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Oszacowanie biomasy korzeni w drzewostanach sosnowych Borów Lubuskich
Assessment of the belowground biomass in Scots pine stands of Bory Lubuskie
Autorzy:: Bijak, S.
Zasada, M.
Powiązania:: https://bibliotekanauki.pl/articles/1015889.pdf
Data publikacji:: 2007
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: biomasa
drzewostany sosnowe
Bory Lubuskie
szacowanie
korzenie
sosna zwyczajna
lesnictwo
wskaznik R-S
rownania allometryczne
Pinus sylvestris
drzewa lesne
belowground biomass
allometric equations
root to shoot ratio
scots pine
bory lubuskie
Opis:: Paper presents the results of assessment of root biomass in Scots pines from the Bory Lubuskie forests. For an absence of original formulae for that region, allometric equations and root to shoot ratios taken from literature were applied. Average belowground biomass in the analysed stands amounted between 30,062 and 39,819 t/ha depending on the applied method. In general the older the stand as well as the more moist and fertile the habitat were, the higher values of the roots biomass were obtained.
Źródło:: Sylwan; 2007, 151, 12; 21-29
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Jakość sosny zwyczajnej, buka zwyczajnego i dębu szypułkowego wyhodowanych z siewu na glebie leśnej o różnym stopniu zagęszczenia
Quality of Scots pine, European beech and pedunculate oak grown from sowing on soil with different compaction levels
Autorzy:: Banach, J.
Kormanek, M.
Jazwinski, J.
Powiązania:: https://bibliotekanauki.pl/articles/2142611.pdf
Data publikacji:: 2021
Wydawca:: Instytut Badawczy Leśnictwa
Tematy:: ground contact pressure
seedling quality
sturdiness quotient
S/R
DQI
nacisk jednostkowy
jakość sadzonek
wskaźnik wytrzymałości
Opis:: In this study, we explore the effect of soil compaction on the growth of seedlings of Scots pine Pinus sylvestris l., European beech Fagus sylvatica L. and pedunculate oak Quercus robur L. On the experimental plots, ground contact pressures ranging from 0 to 250 kPa was applied on the soil. The applied pressure resulted in an increase in soil compaction between 1.02 to 1.19 g cm–3, which reflected pressures exerted by the undercarriage of vehicles used in logging. We then measured the seedlings as well as the dry weight of the roots and the above-ground parts. Using this data, we calculated the following quality indicators for each seedling: SQ – sturdiness quotient, S/R – shoot to root dry mass, DQI – Dickson quality index. For pedunculate oak, the SQ value significantly improved with increasing soil compaction, whereas no differences in the other two indicators were observed. In case of the European beech, the best value of SQ and DQI were observed at a soil density of 1.11 g cm–3, whilst no significant difference for the S/R coefficient could be found. Completely different results were obtained for Scots pine. The most favorable growth was observed when no pressure was applied. However, the SQ and S/R ratios even exceeded the values commonly considered acceptable. Our results therefore indicate that the values of seedling quality indicators are indeed influenced by soil compaction. At a soil compaction of 1.11 g cm–3, the share of seedlings with the SQ value below the critical level was the highest, but a similar relationship could not be confirmed for the other indicators. The response of the seedlings to compaction is likely to be species specific.
Źródło:: Leśne Prace Badawcze; 2020, 81, 4; 167-174
1732-9442
2082-8926
Pojawia się w:: Leśne Prace Badawcze
Dostawca treści:: Biblioteka Nauki

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