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接种丛枝菌根对复垦矿区玉米中重金属含量的影响

Keywords: 覆土厚度,丛枝菌根真菌,尾矿,玉米,重金属

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Abstract:

采用盆栽试验方法,研究了不同培养基质条件(10cm土5cm尾矿、8cm土7cm尾矿、5cm土10cm尾矿)下,接种丛枝菌根真菌和不接种菌根(对照)两种处理对玉米的生物量及植株对重金属元素吸收的影响。结果表明,无论接种与否,植株的生物量都随覆土厚度增大而增大;接种菌根处理中,植株地上部Cr、Cd、Pb等重金属元素的含量比对照处理均有明显降低。植株地上部Pb、Zn、Cu等元素的带走量,接种菌根处理的植株均比其相应的对照处理明显增多,而植株没有表现出受害症状,表明接种菌根可以显著提高玉米植株地上部对重金属的抵抗作用。接种菌根处理的植株中Cd、Cr、Pb、Zn的带走总量均高于对照处理,但因它们绝大部分结合在根部,向植株地上部分的转运受到抑制,而减轻了对人畜的危害。

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