期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 449, 期 -, 页码 345-354出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2013.01.079
关键词
Ammonium-oxidizing bacteria; Denitrification; Nitrification; Soil enzymes; Soil quality; Soil health
资金
- Spanish Ministry of Science and Technology [CGL2006-06485]
- Basque Government [ITE-516-10]
An experiment was performed to study non-target effects of difenoconazole (fungicide), deltamethrin (insecticide) and ethofumesate (herbicide) on microbial parameters in a clay-loam soil. Pesticides were applied as commercial formulations to soil samples at different concentrations (5, 50 and 500 mg kg(-1) DW soil) and then incubated under laboratory conditions for 3 months. Throughout the incubation period, microbial parameters were determined at days 7, 30, 60 and 90. At 5 mg kg(-1) DW soil, none of the three pesticides caused significant changes in soil microbial parameters. In contrast, at 500 mg kg(-1) DW soil, pesticide application decreased overall soil microbial activity, negatively affecting the activity of soil enzymes. Similarly, at 500 mg kg(-1) DW soil, difenoconazole and ethofumesate, but not deltamethrin, caused a pesticide-induced stress on soil microbial communities, as reflected by the respiratory quotient. Besides, deltamethrin and ethofumesate at 50 and 500 mg kg(-1) DW soil resulted in lower values of denitrification potential. It was concluded that, although pesticide concentration had a somewhat inconsistent and erratic effect on soil microbial parameters, pesticide application at 500 mg kg(-1) DW soil did have an impact on many of the microbial parameters studied here. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据