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| Investigating the intercropping effects of Sedum plumbizincicola and Luffa cylindrical on soil cadmium fractions and cadmium uptake by Luffa cylindrical |
| Received:June 20, 2016 |
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| KeyWord:Sedum plumbizincicola;Luffa cylindrical;intercropping;soil cadmium fractions |
| Author Name | Affiliation | E-mail | | WANG Jing-wen | Plant Protection Station of Hangzhou city, Hangzhou 310020, China | | | CAI Mei | Key Laboratory of Environment Remediation and Ecological Health(Zhejiang University), Ministry of Education, Hangzhou 310058, China | | | ZHENG Jie-min | Academy of Agricultural Sciences in Hangzhou, Hangzhou 310024, China | | | LI Dan | Plant Protection Station of Hangzhou city, Hangzhou 310020, China | | | WANG Xian-bo | Academy of Agricultural Sciences in Hangzhou, Hangzhou 310024, China | | | ZHANG Qi-chun | Key Laboratory of Environment Remediation and Ecological Health(Zhejiang University), Ministry of Education, Hangzhou 310058, China | qczhang@zju.edu.cn |
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| Abstract: |
| Natural occurring processes particularly human activities contribute to release heavy metals in the environment. Cadmium(Cd) is a widespread heavy metal now, released into the environment through various activities. Cadmium uptake by crops is a serious concern because of its potential toxicity to humans. A pot experiment was conducted to investigate the effects of Luffa cylindrica intercropped with zinc/cadmium hyperaccumulator Sedum plumbizincicola, calcium magnesium phosphate was added, and immobilized cadmium bacteria were inoculated, the soil Cd fractions and Luffa cylindrica's heavy metal accumulation in polluted soil were studied. The results showed that the fruit number was reduced and Cd concentration was increased in the treatment of Luffa cylindrica and Sedum plumbizincicola intercropping, while the fruit number was increased by inoculation with cadmium stabilizing bacteria or addition of calcium magnesium phosphate, more over the Cd concentrations in fruit of Luffa cylindrica didn't exceed the national standard. Furthermore, Sedum plumbizincicola and Luffa were found to have strong extraction ability of Cd. In heavily polluted soil, Luffa had higher ability of Cd removal than in the lightly polluted soil. Therefore, Luffa cylindrica and hyperaccumulator Sedum plumbizincicola intercropping assisted by immobilized cadmium bacteria or calcium magnesium can be used for remediation and production in lightly contaminated soil to reduce Cd contents in edible part of crops. |
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