关键词: 农药污染, 蚯蚓, 生物标志物

Abstract: Increasing attention was paid to the problem of pesticide pollution by people. Risk assessment of pesticide should not be only based on the chemical analysis of environmental samples，since this method could’t truly distinguish whether the pesticide was harmful to environment. Thus，biological assessment system should be established. Earthworms were widely used to evaluate the pesticide pollution owing to its large number in soil ecosystem and its role as the bottom of food chain. The changes of earthworm biomarkers measured at the molecular or cellular level could be used to discern agricultural chemical pollution at earlier time. Based on the history of biomarker，earthworm could be used as the model organism to evaluate the soil ecological risk of pesticides. According to this characteristic of earthworm，some kinds of earthworm biomarker （such as acetylcholinesterase，antioxidant enzymes，immunocyte and gene expression） were discussed on its assessment of the pesticide contamination level and its action mechanism.

Key words: pesticide contamination, earthworm, biomarkers