乐果与Cd_2_复合污染对土壤微生物生态效应研究.pdfVIP

农业环境科学学报 ２００9,28(2):348-352 Ｊｏｕｒｎａｌ ｏｆ Ａｇｒｏ-Ｅｎｖｉｒｏｎｍｅｎｔ Ｓｃｉｅｎｃｅ Cd2+ 乐果与 复合污染对土壤微生物生态效应研究 1 2 1 1 1 1 邹小明 ，王能强 ，张瑜敏 ，钟 禄 ，曾达芬 ，朱立成 （1.江西省高校生态环境与资源重点实验室，井冈山大学，江西吉安 343009；2.湖南科技大学生命科学学院，湖南 湘潭 411201） 摘 要：土壤微生物数量及土壤酶活性是描述土壤的重要生物学指标。在实验室控制条件下，研究了农药乐果、Cd2+单一污染及乐 果与Cd2+复合污染对土壤3 大类群微生物数量和主要土壤酶活性的影响。结果表明，Cd2+和乐果复合处理对土壤中微生物生长存在 着明显的拮抗作用，复合抑制效应顺序为放线菌真菌细菌；而对土壤酶活性均有明显的协同作用，复合抑制效应顺序为蛋白酶 蔗糖酶脲酶。单一污染时，100 mg·kg-1 乐果的处理可不同程度地抑制这些生物学指标，其中对土壤微生物数量的抑制效应顺序为 真菌放线菌细菌，对土壤酶活性的抑制效应顺序与乐果和Cd2+复合污染顺序一致；50 mg ·kg-1 浓度的乐果对这些指标几乎无影响。 关键词：乐果；镉；土壤微生物；土壤酶 X53 A 1672-2043(2009)02-0348-05 中图分类号： 文献标志码： 文章编号： Eco-toxicological Effect of Cadium and Dimethoate Combined and Simplex Pollution on Soil Microbe 1 2 1 1 1 1 ZOU Xiao-ming , WANG Neng-qiang , ZHANG Yu-min , ZHONG Lu , ZENG Da-fen , ZHU Li-cheng （1.Key Lab of Ecological Environment and Resource Development of Jiangxi Province, Jinggangshan University, Jian 343009, China; 2.Life Science Department of Hunan University of Technology, Xiangtan 411201, China） Abstract ：Dimethoate is an insecticide widely used on fruit trees, leaf vegetables, cotton and other horticultural crops to control sucking in－ sets. Owing to the widely pollution of Cd2+ in farmland, there is a widespread belief that the phenomenon of Cd2+ and dimethoate Combined Pollution is existence commonly in farmland ecosystem which using dimethoate frequently. This paper aims at discussing eco-toxicological effect of Cd2+ and dimethoate combined pollution on soil microbe. The polluted soil enzyme activities （invertase, urease, proteinase）de－ termined by colorimetry method and microbial population determined by the pour plate method were studied in simulative experiment condi－ tion. The results showed that there existed