Cd、Zn、菲和多效唑复合污染土壤的微生物生态毒理效应

Ecotoxicological effects of Cd,Zn,phenanthrene and MET combined pollution on soil microbe

以土壤脱氢酶、呼吸强度和微生物生物量作为生态毒理指标，通过正交实验，在室内培养条件下考察了４种不同性质的有机与无机污染物（Ｃｄ、Ｚｎ、菲和多效唑）复合污染的土壤微生物生态效应。复合投加这４种污染物能使土壤微生物活性受到不同程度的抑制，且抑制率随时间的推移而下降；３种微生物生态毒理指标之间存在着很好的相关性，但脱氢酶活性在三者中最敏感；影响土壤微生物活性的主要因子依次为：菲＞Ｃｄ＞Ｚｎ＞Ｚｎ与菲的交互作用＞Ｚｎ与多效唑的交互作用；实验表明，Ｚｎ与菲的交互作用为拮抗作用。

Interaction between four chemicals,i.e.Cd,Zn,phenan threne and multi effects triazole(MET),was investigated through an orthogonal laboratory incubation experiment.During 8 weeks of incubation,27 combinations of these four chemicals all caused inhibition of soil dehydrogenase,respiration and microbial biomass to different degrees,and the inhibition rates decreased with time.These three ecotoxicological parameters correlated very well throughout the experiment.Dehydrogenase appeared to be the most sensitive indicator among these three parameters.Prominent factors affecting microbial activities were proved to be:phenanthrene>Cd>Zn>Zn phenanthrene>Zn MET.It was derived from this study that there existed antagonistic Zn phenanthrene interaction;but Zn MET interaction could not be clarified here.