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Effects of manure and mineral fertilization strategies on soil antibiotic resistance gene levels and microbial community in a paddy-upland rotation system

文献类型： 外文期刊

作者： Lin, Hui 1 ; Sun, Wanchun 1 ; Zhang, Zulin 2 ; Chapman, Stephen J. 2 ; Freitag, Thomas E. 2 ; Fu, Jianrong 1 ; Zhang, 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Environm Resource & Soil Fertilizers, Hangzhou 310021, Zhejiang, Peoples R China

2.James Hutton Inst, Aberdeen AB15 8QH, Scotland

3.Zhejiang Agr & Forestry Univ, Coll Forest & Biotechnol, Linan 311300, Peoples R China

关键词： Antibiotic resistance genes;Manure;Fertilization;Paddy-upland rotation;Soil microbial community

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）

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收录情况： SCI

摘要： This work investigated the responses of antibiotic resistance genes (ARGs) and the soil microbial community in a paddy-upland rotation system to mineral fertilizer (NPK) and different application dosages of manure combined with NPK. The occurrence of five tetracycline ARGs (tetA, tetB, tetC, tetG and tetW), two sulfonamide ARGs (sul1 and sul2) and one genetic element (Intl1) was quantified. NPK application showed only slight or no impact on soil ARGs abundances compared with the control without fertilizer. Soil ARGs abundances could be increased by manure-NPK application but was related to manure dosage (2250-9000 kg ha(-1)). Principal component analysis (PCA) showed that the soil ARG profile of the treatment with 9000 kg ha(-1) manure separated clearly from the other treatments; the ARGs that contributed most to the discrimination of this treatment were tetA, tetG, tetW, sul1, sul2 and Intl1. Community level physiological profile (CLPP) analysis showed that increasing manure dosage from 4500 kg ha(-1) to 9000 kg ha(-1) induced a sharp increase in almost all of the detected ARGs but would not change the microbial community at large. However, 9000 kg ha(-1) manure application produced a decline in soil microbial activity. Determination of antibiotics and heavy metals in soils suggested that the observed bloom of soil ARGs might associate closely with the accumulation of copper and zinc in soil. (C) 2016 Elsevier Ltd. All rights reserved.

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