Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 663, Issue -, Pages 29-37Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2019.01.297
Keywords
Straw; PBDEs; Bioavailability; Uptake; Reduction; Microbial community
Categories
Funding
- National Science and Technology Major Project of China [2016YFD0800204]
- Outstanding Youth Fund of the Natural Science Foundation of Jiangsu Province, China [BK20150050]
- Innovative Project of the Chinese Academy of Sciences [ISSASIP1616]
- Key Program of Frontier Sciences, Chinese Academy of Sciences [QYZDJ-SSW-DQC035]
- National Natural Science Foundation of China [21677149]
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Application of crop residues is a conventional practice that contributes to crop production through nutrient returns and other benefits to soil health: driving soil physicochemical and biological functions. However, little is known about the impacts of straw residue incorporation on the bioavailability of organic pollutants and associated changes in microbial community structure in contaminated soils. In this study, maize straw was added to a soil contaminated with a model polybrominated diphenyl ether (BDE-47). A pot experiment was conducted and planted with carrot (Daucus carota L.). We found that straw addition greatly reduced the bioavailability of BDE-47, changed the bacterial community structure and affected a range of soil physiochemical properties. Moreover, the amount of BDE-47 that had accumulated in carrot roots and aboveground tissues was significantly reduced. This study may therefore describe an effective agronomic strategy to reduce the bioavailability of polybrominated diphenyl ethers (PBDEs) in a soil used to grow high value vegetable crops. This strategy draws on traditional wisdom and shows promise as a practical method to support horticultural production systems, remediate soils, and help to ensure food safety. (C) 2019 Elsevier B.V. All rights reserved.
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