外源汞添加对土壤微生物区系的影响.PDF

安徽农业大学学报, 2016, 43(2): 248-251 Journal of Anhui Agricultural University [DOI] 10.13610/ki.1672-352x005 网络出版时间：2016-3-11 10:29:48 [URL] /kcms/detail/34.1162.S1029.010.html 外源汞添加对土壤微生物区系的影响 1 1 2* 单 平 ，伍震威 ，葛高飞 (1. 安徽省环境监测中心站，合肥 230071 ；2. 安徽农业大学生物技术中心，合肥 230036) 摘 要：汞作为环境的主要污染重金属之一，对土壤微生物的影响是表征其环境效应的重要方面，结果可为土 壤环境监测等提供生物学依据。以安徽省淮南市水稻土为材料，通过室内模拟试验探索了汞对土壤微生物区系的影 响。结果表明，汞对土壤中细菌、真菌和放线菌的增殖总体上具有抑制作用，但这种抑制效应具有波动性特点，并 且随着培养时间的延长微生物的被抑制程度减弱。高浓度汞（50 mg·kg-1 ）在整个培养期内对细菌、真菌和放线菌 -1 -1 均有显著的抑制作用；中低浓度汞（10 mg·kg 和 2 mg·kg ）对微生物影响随培养时间而波动。全汞和有效汞的含 量显著影响了三大菌群的数量（P0.05 ）。真菌在较高汞污染土壤上产生抗性，而放线菌对汞污染较为敏感，能够 指示程度较轻的土壤汞污染。 关键词：汞污染；水稻土；微生物区系；有效汞 中图分类号：S154.3 文献标识码：A 文章编号：1672−352X (2016)02−0248−04 Effect of exogenous mercury addition on soil microbial populations 1 1 2 SHAN Ping , WU Zhenwei , GE Gaofei (1. Anhui Environmental Monitoring Center, Hefei 230071; 2. Biotechnology Center, Anhui Agricultural University, Hefei 230036) Abstract: Mercury is one of the major heavy metal pollutants in the environment and its effect on soil mi- croorganism is an important aspect to characterize the soil environment. Investigation of the relationship between mercury concentration and soil microorganism can provide a biological basis for soil environmental monitoring. In this paper, the effect of mercury on microbial populations (bacteria, fungi and actinomyces) in paddy soils in Huainan City, Anhui province, was studied through the laboratory simulation experiments. The results showed that mercury generally inhibited the deve