The effect of air elevated (CO2) on Norway spruce aboveground biomass and crown architecture

0370761 - ÚVGZ 2012 LT eng C - Konferenční příspěvek (zahraniční konf.)
Pokorný, Radek - Tomášková, Ivana - Slípková, Romana
The effect of air elevated (CO2) on Norway spruce aboveground biomass and crown architecture.
Climate change: Agro-and forest systems sustainability. Abstracts of International Scientific Conference. Babtai: Institute of horticulture Lithuanian research centre for agriculture and forestry, 2011, s. 31-32.
[Climate change: Agro-and forest systems sustainability. International Scientific conference. Babtai (LT), 21.06.2011-22.06.2011]
Výzkumný záměr: CEZ:AV0Z60870520
Klíčová slova: biomass allocation * canopy closure * dendrometry * long-term experiment * secondary shoots
Kód oboru RIV: EH - Ekologie - společenstva

Studies of stem dendrometric parameters, crown architecture and biomas of above-ground tree organs were carried out on young (17-19 year old) Norway spruce cultivated inside glass domes with ambient (A, 370 µmol (CO2) mol-1) and elevated (E, 700 µmol (CO2) mol-1) atmospheric (CO2) in begining in 1997 in Beskydy Mountains. The trees were growing in two different stand densities until 2002. Two schematic thinning was performed. Amount of branches with secondary shoots and total amount of secondary shoots on branches and on stems were higher within the crowns of E-trees compared to A- ones, particularly in dense stand. After thinning, number of branches with secondary shoots and stem secondary shoots decreased and it was found to be even lower in E sparse part than in A sparse part. High secondary shoots formation serves as a possible carbon sink slowing down reduction of photosynthesis and growth. Thinning highly stimulated growth of the primary structure and biomass allocation into the above ground tree organs.
Trvalý link: http://hdl.handle.net/11104/0204461