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为了探索金川矿区土壤理化性质对土壤微生物的影响。在对金川矿区进行环境现状调查的基础上,根据区域环境,布设重污染区、缓冲区、人为干扰区和原生态区4区为研究区域,对4区域共有荒漠植物骆驼蓬和中亚紫菀木根际、非根际60个样点土壤理化性质与微生物数量进行相关性分析。结果表明:4个区土壤p H在8.09~9.04之间,属于弱碱性土壤;土壤电导率及3种重金属(Ni、Cu、Cr)含量按重污染区(旧尾矿坝、尾矿坝)、缓冲区(矿山公园、废渣堆外100 m)、人为干扰区(农田土壤)、原生态区(下四分)均有依次减小的趋势;土壤中可培养微生物数量为21×10~5~2.63×10~5cfu/g,其中重污染区尾矿坝微生物数量最多,细菌数量为20.25×10~5cfu/g,真菌数量为11.47×10~5cfu/g。影响金川矿区微生物生长的主要因素是土壤的p H和重金属含量。在重污染区骆驼蓬根际,土壤pH与可培养细菌数量完全负相关,在人为扰动区土壤pH与可培养细菌数量完全正相关。矿区土壤中适度的Ni和Cu协同促进微生物的生长。
In order to explore the soil physical and chemical properties of Jinchuan mining soil microbial impact. Based on the survey of environmental status quo of Jinchuan mining area, four areas of heavy polluted area, buffer area, man-made interference area and original ecological area were set up as the research area, Correlation analysis of soil physical and chemical properties with the number of microbes in 60 samples of rhizosphere and non-rhizosphere soil. The results showed that the soil p H of the four plots was between 8.09 and 9.04 and belonged to a weakly alkaline soil. The soil electrical conductivity and the contents of three heavy metals (Ni, Cu and Cr) were classified as heavy polluted areas (old tailings dam, tailings dam ), The buffer zone (mine park, 100 m outside the waste pile), man-made interference zone (farmland soil) and the original ecological zone (lower quarter) all decreased in turn. The number of culturable microorganisms in soil was 21 × 10 ~ 5 ~ 2.63 × 10 ~ 5cfu / g, of which, the number of microbes in tailings dam in heavy polluted area was the highest, the number of bacteria was 20.25 × 10 ~ 5cfu / g and the number of fungi was 11.47 × 10 ~ 5cfu / g. The main factors influencing the microbial growth in Jinchuan mining area are soil p H and heavy metal contents. The soil pH was completely negatively correlated with the number of culturable bacteria in the root zone of Peganum harmala in the heavily polluted area. The soil pH was positively correlated with the number of cultivable bacteria in the disturbed area. Appropriate Ni and Cu in the mining soil synergistically promote microbial growth.