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Transport of veterinary medicines from soils to groundwater
Project
Project code: DFG FOR 566
Contract period: 01.01.2005
- 31.12.2010
Purpose of research: Basic research
Studies on the mobility and leaching of veterinary medicines are continued using soil columns and lysimeters. The lysimeters that were manured with slurry from pigs medicated with either 14C labelled sulfadiazine (SDZ) or 14C labelled difloxacin (DIF) will be sampled destructively in order to obtain mass balances on the fate of the veterinary medicines and their metabolites. Soil from the destructive sampling of the lysimeters is used in pot experiments to test the hypothesis that bonded SDZ (and DIF) including transformation products may become available through the action of the plant rhizosphere. Soil columns experiments are continued to study the effect of repeated application of slurry containing SDZ and the fate of 14C-labelled hydroxy-sulfadiazine. The knowledge from the soil column experiments is used to predict the transport of SDZ in lysimeters with a numerical model. Therefore sorption experiments with soil from different horizons are mandatory as we experienced unexpected sorption behaviour. In addition we will prepare and conduct the central mesocosm and field experiment.
Section overview
Subjects
- Agroecology
- Soil science
Collaborative Project
FOR 566: Veterinary Medicines in Soils - Basic Research for Risk Analysis