土壤生物污染是指病原体和带病等有害生物种群从外界侵入土壤，破坏土壤生态系统的平衡，引起土壤质量下降的现象。有害生物种群来源是用未经处理的人畜粪便施肥、生活污水、垃圾、医院含有病原体的污水和工业废水(作农田灌溉或作为底泥施肥)，以及病畜尸体处理不当等。通过上述主要途径把含有大量传染性细菌、病毒、虫卵带入土壤，引起植物体各种细菌性病原体病害，进而引起人体患有各种细菌性和病毒性的疾病，威胁人类生存。
本文通过阐述重金属污染对土壤生物及土壤酶活性的影响，揭示了重金属污染对土壤生态系统的危害。
This article expounds the effects of pollution of heavy metals on soil organisms and soil enzyme activities, discovers the harm of pollution of heavy metals on soil ecosystem.
目的研究微生物-植物联合对稠油污染土壤的修复效果，为石油污染土壤生物修复技术的应用提供依据。
The paper intends to investigate the combined effects of microorganism and plant on the remediation of soil polluted by thick oil, and to provide practical methods for the remediation.
概述了土壤石油污染的危害及其现状，介绍了主要的石油污染土壤生物修复技术的原理及研究进展。
The danger and current situation of the soil polluted by oil were summed up and main biological principle of oil-polluted soil and the research progress in recovery technique were introduced.
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