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选用紫云英(Astragalus sinicus L.)作为宿主植物,通过盆栽试验研究了接种紫云英根瘤菌(Rhizobium huakuii)对多氯联苯污染土壤的修复效应。结果表明,经过100天的修复作用后,单接种根瘤菌、种植紫云英以及紫云英接种根瘤菌处理土壤中多氯联苯的去除率分别为20.5%、23.0%、53.1%,均显著高于对照处理(P<0.01)。而且发现接种根瘤菌显著增加了紫云英根际土壤的微生物生物量碳、氮,明显增强了土壤微生物群落的碳源利用能力,从而改善了微生物群落功能多样性。可见,紫云英–根瘤菌共生体对多氯联苯污染土壤表现出较好的修复潜力。
The Astragalus sinicus L. was chosen as the host plant, and the effect of Rhizobium huakuii inoculation on PCB-contaminated soil was studied by pot experiment. The results showed that the removal rate of PCBs in soil after inoculation with Rhizobium alone, Rhizobium inoculated with Rhizobium asiatica, and Rhizobium camellia were 20.5%, 23.0% and 53.1% after 100 days of remediation, respectively Higher than the control (P <0.01). In addition, it was found that rhizobium inoculation significantly increased the microbial biomass carbon and nitrogen in the rhizosphere soil of Astragalus sinicus, which significantly enhanced the carbon source utilization ability of soil microbial communities and improved the functional diversity of microbial communities. It can be seen that the milk vetch - rhizobium symbiont shows a good potential for remediation of PCB-contaminated soils.