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紫花苜蓿-菌根真菌-根瘤菌对多氯联苯污染土壤的修复作用

Keywords: 多氯联苯,农田土壤,生物修复

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Abstract:

以紫花苜蓿为材料,运用盆载试验,通过接种根瘤菌、菌根真菌对多氯联苯污染土壤的修复效应进行了研究。结果表明,紫花苜蓿对土壤中多氯联苯浓度降低具有重要作用,重污染土壤中平均降低了24.48%,轻污染土壤平均降低了19.14%;根瘤菌和菌根真菌双接种强化了紫花苜蓿对多氯联苯的修复作用,污染土壤的修复效果与土壤原污染程度有关;紫花苜蓿-菌根真菌-根瘤菌协同修复效果在重污染土壤中强于轻污染土壤;同时紫花苜蓿对土壤中PCBs表现出较强的耐性,因而可以作为PCBs污染土壤的植物修复材料。

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