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进水碳负荷浓度对垂直潜流式人工湿地中植物根系微生物动态的影响

Keywords: 垂直潜流式人工湿地,千屈菜,微生物多样性指数,植物生长阶段,植物根系

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Abstract:

植物的不同生长发育阶段是影响根系微生物功能多样性的原因之一。植物的生长改变了微生物的群落结构。在低有机负荷或高有机负荷下,植物幼苗与成苗根系的微生物整体活性均差异明显,一般成苗期具有较高AWCD值。有植物湿地中微生物Simpson和Mcintosh多样性指数在植物成苗期均明显高于幼苗期(P0.05)。无植物湿地中微生物Simpson和Mcintosh指数受季节影响差异显著(P<0.05)。主成分和聚类分析结果表明,不同生长发育阶段其微生物种类存在差异,而且不同进水条件下有植物湿地和无植物湿地各自有相似的微生物群体结构。

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