Toxic effects of four sulphonylureas herbicides on soil microbial biomass |
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Authors: | Adriano Sofo Antonio Scopa Stefano Dumontet Angelo Mazzatura Vincenzo Pasquale |
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Institution: | 1. Department of Agriculture , Forestry and Environment, University of Basilicata , Potenza , Italy;2. Department of Environmental Sciences , Parthenope University , Naples , Italy |
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Abstract: | The effect of four triazinyl-sulfonylurea herbicides (cinosulfuron, prosulfuron, thifensulfuron methyl, triasulfuron) on soil microbial biomass, soil respiration, metabolic activity, metabolic quotient, and some enzymatic activities (acid and alkaline phosphatase, β-glucosidase, arylsulphatase, and fluorescein diacetate hydrolysis) were monitored under controlled conditions over 30 days. The herbicides were applied at the normal field dose (FD) and at ten-fold (10 FD) the field dose, in order to mimic a long term toxic effect. The measured soil microbial parameters showed that the FD had slight effects on soil microflora, while at 10 FD the tested herbicides exerted a stronger detrimental effect on soil microbial biomass and its biochemical activities. |
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Keywords: | Herbicides triazinyl-sulfonylurea respiration microbial biomass metabolic quotient soil enzymes |
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