杨树修复阿特拉津污染土壤的根际微生物碳源利用研究

发布时间：2019-06-02 01:50

【摘要】：以杂交杨树作为修复研究对象,利用根箱和Biolog系统开展阿特拉津污染土壤不同酸碱调节剂处理树木修复过程中不同根际微生物多样性研究。结果表明:树木修复初期(第30 d)酸碱调节剂对土壤微生物活性及其群落碳源利用表现出显著的促进作用;而至修复第90 d时,酸性调节剂处理土壤的微生物活性及其群落碳源利用能力开始回落下降,甚至低于单纯植入杨树处理,而碱性调节剂的施用仍然对土壤微生物活性及其微生物群落碳源利用能力具有显著的促进效果。但杨树树木修复阿特拉津污染土壤过程中根际微生物整体活性及其群落结构演变并没有表现出稳定的规律性。鉴于Biolog ECO碳源有限,并不能完全反映土壤微生物群落结构的功能多样性,不同酸碱调节剂处理杨树修复土壤阿特拉津污染过程中根际微生物活性及群落结构不规律变化的原因及相关机理,还有待结合更精密的分析测试手段作进一步深入研究。
[Abstract]:Taking hybrid poplar as the object of remediation, the microbial diversity in different rhizosphere of atrazin contaminated soil treated with different acid and base regulators was studied by root box and Biolog system. The results showed that acid-base regulator had a significant effect on soil microbial activity and carbon source utilization in community at the beginning of tree restoration (30th day). At the 90th day of restoration, the microbial activity of the soil treated with acid regulator and the carbon source utilization ability of the community began to decrease, even lower than that of poplar implantation alone. However, the application of alkaline regulator still has a significant effect on soil microbial activity and carbon source utilization ability of microbial community. However, the overall activity of rhizosphere microorganisms and the evolution of community structure in the process of remediation of atrazin contaminated soil by poplar trees did not show a stable regularity. In view of the limited carbon source of Biolog ECO, it can not fully reflect the functional diversity of soil microbial community structure. The causes and related mechanisms of irregular changes of microbial activity and community structure in rhizosphere of poplar treated with different acid-base regulators need to be further studied in combination with more precise analysis and testing methods.
【作者单位】：中国林业科学研究院荒漠化研究所;贵州大学环境与资源工程学院;海南省环境科学研究院;河南理工大学万方科技学院;
【基金】：国家自然科学基金项目(30700637)资助中央公益型科研院所基本科研业务费专项资金项目(CAFRIF200706)资助
【分类号】：S714.3

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