中文摘要：

土壤作为一种的主要生态系统类型,具有重要的生态服务功能。为了保持土壤环境健康,我们需要关注环境污染,特别是农药污染对土壤的影响。本研究采集了来自苏州和无锡的太湖地区的土壤,检测农药的残留量并结合土壤中的微生物指标和蚯蚓生物标志物的反应来评估该土壤受到的污染状况。土壤中检测出了DDTs（p,p’-DDT,p,p’-DDE和p,p’-DDD）、毒死蜱、氟硅唑和多菌灵,浓度范围分别是0.37-4.98 ng/g,2.25-2.34 ng/g,3.22 ng/g,4.40-8.83 ng/g干重。与其他地区相比,该地区土壤中的农药残留量较低,且该地区的蚯蚓体内的氧化应激水平也较低,由此推测,这些农药残留不会造成较高的生态风险。不过土壤酶活性较低,表明该土壤仍然受到了一定程度的污染,这类污染可能是金属或其他有机或无机化合物。

英文摘要：

As a major ecosystem type, soil provides invaluable ecological services. Environmental pollution, especially pesticides pollution should be paid more attention to keep soil healthy. In our study, the pesticides residues in subsurface soils from Suzhou and Wuxi in Taihu Lake area, China, were investigated, and their ecological risks were assessed by combining soil microbiological parameters and biomarker responses in earthworms. Only DDTs（including p,p’-DDT, p,p’-DDE and p,p’-DDD）, chlorpyrifos, fluorosiliconazole and carbendazim were detected, with the concentrations in the range of 0.37-4.98 ng g-1 dry weight（dw）, 2.25-2.34 ng g-1 dw, 3.22 ng g-1 dw, and 4.40-8.83 ng g-1 dw, respectively. The concentrations in these soils were relatively lower compared with other researches in China or other country. It could be inferred that these pesticides residues may pose low eco-toxicological risk, which was further testified by slightly or little oxidative stress in earthworms collected in situ. However, the decreased soil enzymes activities could indicate that the soils were still in a certain degree of pollution coming from other pollutants, such as metals or other organic or inorganic compounds. Further compounds determination about the soils was needed.