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Effects of soil amendments applied on cadmium availability, soil enzyme activity, and plant uptake in contaminated purple soil
He, Dongyi1,2; Cui, Jian2,3,4; Gao, Min2; Wang, Wenqiang1; Zhou, Jing3; Yang, John5; Wang, Jingjing3; Li, Yong1; Jiang, Changsheng1; Peng, Yi6
2019-03-01
摘要Soil Cd pollution resulting from human activities has become a serious food safety concern. This study was to investigate the impacts of eight soil amendments including a humic acid material (XZ), three organic-inorganic combined materials (FY, PX and PLY) and four inorganic materials (FS, LIME, PLL and PL) on soil Cd availability, enzyme activity, and the uptake by vegetables under incubation, greenhouse and field conditions. Results showed that soil exchangeable Cd (EX-Cd) concentrations under four amendments (FY. XZ, PX, FS) significantly decreased by 12.10-13.59% after 20d treatments, and both PX and PLY resulted in reduced soil EX-Cd fraction while increased fractions of Fe-Mn oxides (OX-Cd), organic matter (OM-Cd) and residual (Res-Cd) in the Cd-contaminated purple soil. PX significantly reduced soil EX-Cd and carbonate-bound (CB-Cd) fractions by 4.4% and 11.4%, and decreased vegetable Cd uptake by 38.8% and 49.1% in greenhouse and field experiments, respectively. Moreover. PX elevated the activities of soil catalase, urease and saccharase by 15.7%, 53.6% and 48.2% in pot soil, which were similar to 4, similar to 5 and similar to 14 times higher those in field soil, respectively. This research demonstrated that PX could be an effective soil amendment to reduce the Cd health and ecological riskthe is in the Cd-contaminated purple soil. (C) 2018 Elsevier B.V. All rights reserved.
关键词Cd availability Cd uptake Soil pollution Soil amendments Purple soil
DOI10.1016/j.scitotenv.2018.11.059
发表期刊SCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
卷号654页码:1364-1371
通讯作者Cui, Jian(cuijian@cigit.ac.cn) ; Zhou, Jing(zhoujing@issas.ac.cn) ; Jiang, Changsheng()
收录类别SCI
WOS记录号WOS:000458630100126
语种英语