期刊
ENVIRONMENTAL POLLUTION
卷 156, 期 3, 页码 1243-1251出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2008.03.011
关键词
Veterinary antibiotics; Cattle feedlot; Soil; Manure layer; Depth profiles
资金
- EU/Canada programme in higher education and training
- project AGROBIOTEC and the Scholarship program of the German Federal Environmental Foundation [20003/498]
- German Research Foundation [Th 678/6-2]
Feedlots are potential point sources for the flow of antibiotics into the environment due to common use of antibiotics such as sulfamethazine, chlortetracycline and tylosin. Hence soils and manures originating from a grassland control, an experimental and a commercial feedlot were analyzed and mass balances were calculated for these antibiotics. Up to 9990 mu g kg(-1) sulfamethazine and 401 mu g kg(-1) chlortetracycline on a dry matter basis were determined in feedlot manure. Soil concentrations were two orders of magnitude smaller. This corresponds to 7-40% of the calculated residual amount. In the commercial feedlot chlortetracycline was found down to soil depths of -40 cm; sulfamethazine was still detectable 1 year after medication. Sulfamethazine and chlortetracycline were additionally determined in manure of a control treatment in the experimental feedlot where cattle never received antibiotics. This was attributed to runoff from upslope pens. Consequently. antibiotics partially persist within feedlots and may be dislocated into the surrounding environment by vertical transport and runoff. (C) 2008 Elsevier Ltd. 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