金川矿区重金属污染对土壤微生物分布的影响
发布时间：2018-11-08 20:47
【摘要】：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。
[Abstract]:In order to explore the effect of soil physical and chemical properties on soil microorganism in Jinchuan mining area. On the basis of the investigation of the environmental situation in Jinchuan mining area, according to the regional environment, there are four regions of heavy pollution area, buffer zone, artificial disturbance area and original ecological area as the research areas. The desert plant Camellia camelliana and the rhizosphere of Aster in Central Asia are shared in the four regions. The correlation between soil physical and chemical properties and microbial quantity in 60 non-rhizosphere samples was analyzed. The results showed that the pH of soil in four regions was between 8.09 and 9.04, which was a weak alkaline soil. The conductivity of soil and the content of three heavy metals (Ni,Cu,Cr) in heavy polluted area (old tailings dam, tailings dam), buffer zone (mine park, 100 m), disturbance area outside waste residue) (farmland soil), soil conductivity and content of three heavy metals (Ni,Cu,Cr) in heavy polluted area (old tailings dam, tailings dam), buffer zone (mine park), There was a decreasing trend in the primordial ecological areas (lower four points). The number of culturable microorganism in soil was 21 脳 10 ~ (5) ~ (5) ~ 2.63 脳 10 ~ (5) cfur 路g, among which the number of microorganism in the tailings dam was the most, the number of bacteria was 20.25 脳 10 ~ (5) cfur / g, and the number of fungi was 11.47 脳 10 ~ (5) cfur / g. The main factors affecting microbial growth in Jinchuan mining area are soil pH and heavy metal content. Soil pH was negatively correlated with the number of culturable bacteria in heavily polluted areas, and soil pH was positively correlated with the number of culturable bacteria in anthropogenic disturbed areas. Moderate Ni and Cu in the soil of mining area promote the growth of microorganism.
【作者单位】： 兰州交通大学化学与生物工程学院;兰州城市学院城市生态与环境生物技术中心;
【基金】：国家自然科学基金项目(31460162,31160118,30960060) 甘肃省科技支撑计划(144FKCA086)
【分类号】：X53;X172;X751
[Abstract]:In order to explore the effect of soil physical and chemical properties on soil microorganism in Jinchuan mining area. On the basis of the investigation of the environmental situation in Jinchuan mining area, according to the regional environment, there are four regions of heavy pollution area, buffer zone, artificial disturbance area and original ecological area as the research areas. The desert plant Camellia camelliana and the rhizosphere of Aster in Central Asia are shared in the four regions. The correlation between soil physical and chemical properties and microbial quantity in 60 non-rhizosphere samples was analyzed. The results showed that the pH of soil in four regions was between 8.09 and 9.04, which was a weak alkaline soil. The conductivity of soil and the content of three heavy metals (Ni,Cu,Cr) in heavy polluted area (old tailings dam, tailings dam), buffer zone (mine park, 100 m), disturbance area outside waste residue) (farmland soil), soil conductivity and content of three heavy metals (Ni,Cu,Cr) in heavy polluted area (old tailings dam, tailings dam), buffer zone (mine park), There was a decreasing trend in the primordial ecological areas (lower four points). The number of culturable microorganism in soil was 21 脳 10 ~ (5) ~ (5) ~ 2.63 脳 10 ~ (5) cfur 路g, among which the number of microorganism in the tailings dam was the most, the number of bacteria was 20.25 脳 10 ~ (5) cfur / g, and the number of fungi was 11.47 脳 10 ~ (5) cfur / g. The main factors affecting microbial growth in Jinchuan mining area are soil pH and heavy metal content. Soil pH was negatively correlated with the number of culturable bacteria in heavily polluted areas, and soil pH was positively correlated with the number of culturable bacteria in anthropogenic disturbed areas. Moderate Ni and Cu in the soil of mining area promote the growth of microorganism.
【作者单位】： 兰州交通大学化学与生物工程学院;兰州城市学院城市生态与环境生物技术中心;
【基金】：国家自然科学基金项目(31460162,31160118,30960060) 甘肃省科技支撑计划(144FKCA086)
【分类号】：X53;X172;X751
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