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Responses in young Quercus petraea: coppices and standards under favourable and drought conditions
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SYSNO ASEP 0465984 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Responses in young Quercus petraea: coppices and standards under favourable and drought conditions Tvůrce(i) Stojanović, Marko (UEK-B) ORCID, RID, SAI
Čater, M. (SI)
Pokorný, Radek (UEK-B) RID, ORCID, SAIZdroj.dok. Dendrobiology. - : Polska akademia nauk - ISSN 1641-1307
Roč. 76, jan (2016), s. 127-136Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. PL - Polsko Klíč. slova coppice ; standards ; comparison ; photosynthetic response ; quantum yield ; light conditions ; drought response Vědní obor RIV EF - Botanika CEP EE2.3.20.0267 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Výzkumná infrastruktura CzeCOS II - 90061 - Ústav výzkumu globální změny AV ČR, v. v. i. Institucionální podpora RVO:67179843 - RVO:67179843 UT WOS 000385738200012 EID SCOPUS 84990852394 DOI https://doi.org/10.12657/denbio.076.012 Anotace Assimilation and photosynthetic efficiency (maximal quantum yield) of young oaks were compared
in coppice and standard sessile oak stands of comparable age (100 years) under different light intensity
categories: under minimum light – ISF < 20%, low light – 20%<ISF<25%, medium light – 25%<ISF<30%
and in the open, without mature canopy cover – ISF >30% during favourable and drought conditions.
Measurements of maximal assimilation rates were performed at a constant temperature of the measurement
block (20°C), a CO2 concentration of 400 μmol/l, flow 500 μmol/s and different light intensities: 0,
50, 250, 600, 1200 and 1800 μmol/m2s during three consecutive growing seasons (2012, 2013 and 2014).
In every category at least 8 young naturally regenerated seedlings and sprouts of different coppice stools
were measured. The quantum yield in optimal conditions in standards was highest in the category of closed
canopy, while in coppices in medium light category. During severe drought in 2013 the drop in efficiency
of standards was evident in all categories, while in coppices no differences in efficiency were observed between
favourable 2012 and 2013 with expressed drought stress, proving the advantage of young coppices
over standards in this particular light category. However, the beneficial effects of restoration coppicing are
not guaranteed. It is our belief that in time such advantage might decrease; it would be therefore interesting
to compare responses in time and define, when response abilities of both studied systems become equal.Pracoviště Ústav výzkumu globální změny Kontakt Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Rok sběru 2017
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