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| Comparing the effects of soil amendments on Pb and Cd bioavailability in water spinach under water submersion cultivation and dry farming conditions |
| Received:January 04, 2017 |
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| KeyWord:cultivation method;heavy metal pollution;biochar;lime |
| Author Name | Affiliation | E-mail | | LI Fu-rong | Public Monitoring Center for Agro-product of Guangdong Academy of Agricultural Sciences, Guangzhou 501640, China
Key Laboratory of Testing and Evaluation for Agro-product Safety and Quality, Ministry of Agriculture, P R China, Guangzhou 510640, China
Laboratory of Quality & Safety Risk Assessment for Agro-product(Guangzhou), Ministry of Agriculture, P R China, Guangzhou 510640, China | | | LI Min | Public Monitoring Center for Agro-product of Guangdong Academy of Agricultural Sciences, Guangzhou 501640, China
Key Laboratory of Testing and Evaluation for Agro-product Safety and Quality, Ministry of Agriculture, P R China, Guangzhou 510640, China
Laboratory of Quality & Safety Risk Assessment for Agro-product(Guangzhou), Ministry of Agriculture, P R China, Guangzhou 510640, China | | | ZHU Na | Public Monitoring Center for Agro-product of Guangdong Academy of Agricultural Sciences, Guangzhou 501640, China
Key Laboratory of Testing and Evaluation for Agro-product Safety and Quality, Ministry of Agriculture, P R China, Guangzhou 510640, China
Laboratory of Quality & Safety Risk Assessment for Agro-product(Guangzhou), Ministry of Agriculture, P R China, Guangzhou 510640, China | | | DU Ying-qiong | Public Monitoring Center for Agro-product of Guangdong Academy of Agricultural Sciences, Guangzhou 501640, China
Key Laboratory of Testing and Evaluation for Agro-product Safety and Quality, Ministry of Agriculture, P R China, Guangzhou 510640, China
Laboratory of Quality & Safety Risk Assessment for Agro-product(Guangzhou), Ministry of Agriculture, P R China, Guangzhou 510640, China | | | WANG Fu-hua | Public Monitoring Center for Agro-product of Guangdong Academy of Agricultural Sciences, Guangzhou 501640, China
Key Laboratory of Testing and Evaluation for Agro-product Safety and Quality, Ministry of Agriculture, P R China, Guangzhou 510640, China
Laboratory of Quality & Safety Risk Assessment for Agro-product(Guangzhou), Ministry of Agriculture, P R China, Guangzhou 510640, China | wfhwqs@163.com | | LI Jia-lin | Public Monitoring Center for Agro-product of Guangdong Academy of Agricultural Sciences, Guangzhou 501640, China
Key Laboratory of Testing and Evaluation for Agro-product Safety and Quality, Ministry of Agriculture, P R China, Guangzhou 510640, China
Laboratory of Quality & Safety Risk Assessment for Agro-product(Guangzhou), Ministry of Agriculture, P R China, Guangzhou 510640, China | | | CHEN Yong-jian | Public Monitoring Center for Agro-product of Guangdong Academy of Agricultural Sciences, Guangzhou 501640, China
Key Laboratory of Testing and Evaluation for Agro-product Safety and Quality, Ministry of Agriculture, P R China, Guangzhou 510640, China
Laboratory of Quality & Safety Risk Assessment for Agro-product(Guangzhou), Ministry of Agriculture, P R China, Guangzhou 510640, China | |
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| Abstract: |
| To study the effects of different agronomic measures on heavy metal bioavailability in vegetable-soil systems, in this study, water spinach, which can adapt to both water submersion cultivation and dry farming conditions, was chosen as the research subject. The aim of the study was to compare the effects of applying soil amendments(lime or biochar) on Pb and Cd accumulation by water spinach using different cultivation methods in the soil artificially polluted with a combination of high concentrations of Pb and Cd. In addition, the changes in soil physical and chemical properties and available heavy metal contents under different agronomic measures were analyzed to reveal the influential mechanisms. It turned out that under the two cultivation methods, water spinach showed different accumulation effects of heavy metals and soil heavy metal availabilities. Applying lime under water submersion cultivation conditions could reduce the available contents of Pb and Cd in soil more effectively than that under dry farming conditions. Additionally, under water submersion cultivation conditions, applying both lime and biochar could reduce the Pb and Cd contents in vegetables as the yield increased, but the effect of applying 6 g biochar·kg-1 soil was the best. In summary, compared with dry farming, applying soil amendments under water submersion cultivation conditions could affect Pb and Cd accumulation characteristics in the soil-plant system more. |
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