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Gas exchange characteristics, Pn-PAR and/or Pn-CO 2 response parameters of rape (Brassica napus L) were studied in the field under different O 3 concentrations (CF, 50 nl·L −1 and 100 nl·L −1 ) and fumigation regimes (constant concentration and dynamic varying concentrations) with a portable photosynthetic system (CIRAS-1). Results indicated: (1) Relatively to CF, higher...
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