%0 Journal Article
%A Martinazzo, R.
%A Jablonowski, N. D.
%A Hamacher, G.
%A Dick, D. P.
%A Burauel, P.
%T Accelerated Degradation of 14C-Atrazine in Brazilian Soils from Different Regions
%J Journal of agricultural and food chemistry
%V 58
%@ 0021-8561
%C Washington, DC [u.a.]
%I American Chemical Society (ACS)
%M PreJuSER-11177
%P 7864 - 7870
%D 2010
%Z We gratefully acknowledge financial support from the National Council for Scientific and Technological Development (CNPq), Brazil, and the German Academic Exchange Service (DAAD).
%X The repeated use of a given pesticide may induce a selection of the soil microbial population, resulting in a rapid degradation of the respective xenobiotic. Patterns of atrazine degradation (mineralization, formation of metabolites and nonextractable residues (NER)) were evaluated in two Brazilian soils with a history of atrazine application. Results were compared with those obtained from soils that had no agricultural use or herbicide application history. (14)C-Atrazine mineralization in unsaturated treated soils was high. By the 85th day of incubation, 82% of the applied (14)C-atrazine was mineralized in the Rhodic Hapludox and 74% in the Xanthic Haplustox. Mineralization remained low in nontreated soils (<or=5.1%). Incubation under slurry conditions enhanced atrazine mineralization in the treated Xantic Haplustox and surprisingly also in the nontreated Rhodic Hapludox (98 and 83% on the 85th day, respectively), whereas in the other samples the evolved (14)CO(2) did not differ (p < 0.05) from the unsaturated conditions. The water-extractable amount of atrazine directly after (14)C-atrazine application was higher in both Xanthic Haplustox samples (around 80% of applied atrazine) in comparison to the Rhodic Hapludox samples (around 60%). Extractable activity and the formation of metabolites and NER varied among the studied soils according to the atrazine application history rather than the soil characteristics.
%K Atrazine: analysis
%K Brazil
%K Carbon Isotopes: analysis
%K Herbicides: analysis
%K Soil: analysis
%K Carbon Isotopes (NLM Chemicals)
%K Herbicides (NLM Chemicals)
%K Soil (NLM Chemicals)
%K Atrazine (NLM Chemicals)
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:20557132
%U <Go to ISI:>//WOS:000279573900048
%R 10.1021/jf100549d
%U https://juser.fz-juelich.de/record/11177