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dc.contributor.authorWang Yuan-peng
dc.contributor.author王远鹏
dc.contributor.authorShi Ji-yan
dc.contributor.authorLin Qi
dc.contributor.authorChen Xin-cai
dc.contributor.authorChen Ying-xu
dc.date.accessioned2011-06-04T00:22:50Z
dc.date.available2011-06-04T00:22:50Z
dc.date.issued2007
dc.identifier.citationJOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2007,19(7):848-853zh_CN
dc.identifier.issn1001-0742
dc.identifier.urihttp://dx.doi.org/doi:CNKI:SUN:HJKB.0.2007-07-013
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/9382
dc.description.abstractAll the regulations that define a maximum concentration of metals in the receiving soil are based on total soil metal concentration. However, the potential toxicity of a heavy metal in the soil depends on its speciation and availability. We studied the effects of heavy metal speciation and availability on soil microorganism activities along a Cu/Zn contamination gradient. Microbial biomass and enzyme activity of soil contaminated with both Cu and Zn were investigated. The results showed that microbial biomass was negatively affected by the elevated metal levels. The microbial biomass-C (C-mic)/organic C (C-org) ratio was closely correlated to heavy metal stress. There were negative correlations between soil microbial biomass, phosphatase activity and NH4NO3 extractable heavy metals. The soil microorganism activity could be predicted using empirical models with the availability of Cu and Zn. We observed that 72% of the variation in phosphatase activity could be explained by the NH4NO3-extractable and total heavy metal concentration. By considering different monitoring approaches and different viewpoints, this set of methods applied in this study seemed sensitive to site differences and contributed to a better understanding of the effects of heavy metals on the size and activity of microorganisms in soils. The data presented demonstrate the relationship between heavy metals availability and heavy metal toxicity to soil microorganism along a contamination gradient.zh_CN
dc.language.isoenzh_CN
dc.publisherSCIENCE CHINA PRESSzh_CN
dc.subjectheavy metalszh_CN
dc.subjectavailabilityzh_CN
dc.subjectspeciationzh_CN
dc.subjectactivityzh_CN
dc.subjectsoil microorganismzh_CN
dc.titleHeavy metal availability and impact on activity of soil microorganisms along a Cu/Zn contamination gradientzh_CN
dc.typeArticlezh_CN


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