Abstract
ABSTRACTThe fluoride (F) content of groundwater is high in Kuitun, Xinjiang, China, and the amount of F in soil and plants severely exceeds the limit after irrigation. This study designed a potted plant experiment at different concentrations of irrigation water to investigate the migration and transformation pattern of a water–soil–plant system. Three kinds of green vegetables with high metabolism were selected. Different concentrations of NaF solutions were also prepared to simulate the irrigation of farmland in Kuitun. After the plants were irrigated with different NaF concentrations, the contents of water-soluble state fluorine (Ws-F) and the exchange state fluorine (Ex-F) increased. The F content in plants did not increase as the F concentration in irrigation water increased. The F concentration in different plant organs showed the following trend: root > stem > leaf. Bioconcentration factor (BCF) and transfer factor (TF) of plants initially increased and then decreased, indicating that plants exhibit a self-protection ability at high F concentration.
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