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机译:Effects of season, needle age, and elevated atmospheric CO_2 on chlorophyll fluorescence parameters and needle nitrogen concentration in Scots pine (Pinus sylvestris)
Department of Biology, University of Anterpen (UIA), Universiteitsplein 1, B-2610 Wilrijk, Belgium;
carbon; C/N ratio; fluorescence quenching; open top chambers; photosystem 2; seasonal response;