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- W2032435247 abstract "Abstract The maximum nitrogen uptake activity of Phragmites australis (Cav.) Trin. ex Steud. was observed in mid-May. Aquatic (adventitious) and soil roots absorbed nitrate or ammonium at equal rates under aerobic conditions. After 6–10 h incubation of roots in an open chamber with a stirred medium, dissolved oxygen was reduced almost to zero, probably due to root respiration. It is suggested that the uptake of ammonium by plants was slowed down and that nitrate was lost rapidly under these conditions. The of use 15 N showed that very little nitrate was taken up by P. australis , as compared to ammonium. These results suggest that an important cause of withering of the lower leaves was oxygen deficiency brought about by a blue-green algal bloom, which was followed by nitrogen deficiency of P. australis . The latter resulted from low ammonium uptake and a large loss of nitrate through denitrification around the aquatic roots." @default.
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- W2032435247 title "Early withering of lower leaves of Phragmites australis (Cav.) Trin. ex Steud. in a eutrophic stand: role of oxygen concentration, fate of nitrogen and nitrogen uptake by the plants" @default.
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- W2032435247 doi "https://doi.org/10.1016/0304-3770(92)90004-3" @default.
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