Bulgarian Journal of Agricultural Science
Array ( [session_started] => 1734797033 [LANGUAGE] => EN [LEPTON_SESSION] => 1 )
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Seasonal variations of gas exchange parameters in mono-dominated by Fagus sylvatica and Picea abies stands
Svetoslav Anevorcid, Sonya Damyanovaorcid
Abstract: In carrying out the long-term ecological monitoring activities in the forest site “Petrohan”, the seasonal variations of photosynthetic light-response curves were studied in mono-dominated by European beech (Fagus sylvatica L.) natural forest and Norway spruce (Picea abies Karst.) plantation in West Stara Planina Mountain. The results showed that light curves vary much more during vegetation season in Norway spruce than in European beech. While the beech had gas-exchange parameters confirming its shade tolerance, the spruce was more intolerant to shade. Maximal photosynthesis was highest in spruce in June and permanently decreased in August and October. In contrast to spruce, beech did not have a clear vegetative peak in gas exchange. Still, it achieved a stable carbon balance and a higher carbon-use efficiency, especially before the middle of the growing season. The light-use efficiency of beech and spruce remained relatively constant at whole studied season, confirming this parameter’s species-specific character.
Keywords: light-response curve; LTER forest site; seasonal variation
Citation: Anev, S. & Damyanova, S. (2024). Seasonal variations of gas exchange parameters in mono-dominated by Fagus sylvatica and Picea abies stands. Bulg. J. Agric. Sci., 30 (Supplement 1), 138–143.
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Date published: 2024-12-13
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