【摘要】：為了探索金川礦區(qū)土壤理化性質(zhì)對土壤微生物的影響。在對金川礦區(qū)進(jìn)行環(huán)境現(xiàn)狀調(diào)查的基礎(chǔ)上,根據(jù)區(qū)域環(huán)境,布設(shè)重污染區(qū)、緩沖區(qū)、人為干擾區(qū)和原生態(tài)區(qū)4區(qū)為研究區(qū)域,對4區(qū)域共有荒漠植物駱駝蓬和中亞紫菀木根際、非根際60個樣點土壤理化性質(zhì)與微生物數(shù)量進(jìn)行相關(guān)性分析。結(jié)果表明:4個區(qū)土壤p H在8.09~9.04之間,屬于弱堿性土壤;土壤電導(dǎo)率及3種重金屬(Ni、Cu、Cr)含量按重污染區(qū)(舊尾礦壩、尾礦壩)、緩沖區(qū)(礦山公園、廢渣堆外100 m)、人為干擾區(qū)(農(nóng)田土壤)、原生態(tài)區(qū)(下四分)均有依次減小的趨勢;土壤中可培養(yǎng)微生物數(shù)量為21×10~5~2.63×10~5cfu/g,其中重污染區(qū)尾礦壩微生物數(shù)量最多,細(xì)菌數(shù)量為20.25×10~5cfu/g,真菌數(shù)量為11.47×10~5cfu/g。影響金川礦區(qū)微生物生長的主要因素是土壤的p H和重金屬含量。在重污染區(qū)駱駝蓬根際,土壤pH與可培養(yǎng)細(xì)菌數(shù)量完全負(fù)相關(guān),在人為擾動區(qū)土壤pH與可培養(yǎng)細(xì)菌數(shù)量完全正相關(guān)。礦區(qū)土壤中適度的Ni和Cu協(xié)同促進(jìn)微生物的生長。
[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.
【作者單位】： 蘭州交通大學(xué)化學(xué)與生物工程學(xué)院;蘭州城市學(xué)院城市生態(tài)與環(huán)境生物技術(shù)中心;
【基金】：國家自然科學(xué)基金項目(31460162,31160118,30960060) 甘肅省科技支撐計劃(144FKCA086)
【分類號】：X53;X172;X751

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