Alterations in soil microbial activity and N-transformation processes due to sulfadiazine loads in pig-manure |
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Authors: | Kotzerke Anja Sharma Shilpi Schauss Kristina Heuer Holger Thiele-Bruhn Sören Smalla Kornelia Wilke Berndt-Michael Schloter Michael |
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Institution: | Berlin University of Technology, Institute of Ecology, Franklinstrasse 29, 10587 Berlin, Germany. anja.kotzerke@tu-berlin.de |
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Abstract: | Most veterinary drugs enter the environment via manure application. However, it is unclear how these substances interact with soil biota. Therefore, it was the aim of the present study to investigate the effects of manure containing different concentrations of the antibiotic sulfadiazine (SDZ) on the soil microbial communities. It was shown that manure alone has a stimulating effect on microbial activity. Only potential nitrification was negatively influenced by manure application. The addition of SDZ to the manure reduced microbial activity. Depending on the SDZ concentration, levels of activity were in the range of the control soil without manure application. Also, selected processes in nitrogen turnover were negatively influenced by the addition of SDZ to the manure, with nitrification being the only exception. The effects were visible for up to 4 days after application of the manure with or without SDZ and were correlated with the bioavailability of the antibiotic. |
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Keywords: | Antibiotic Sulfadiazine Nitrogen cycle Functional processes Soil respiration |
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