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| Evaluation of cadmium accumulation in different leafy vegetable cultivars and approaches for reducing accumulation |
| Received:November 23, 2021 |
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| KeyWord:leafy vegetable;cultivar;Cd;accumulation characteristic;contamination remediation |
| Author Name | Affiliation | E-mail | | CHEN Zhiqin | Key Laboratory of Environmental Remediation and Ecosystem Health, Ministry of Education(MOE), College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, China | | | LIU Qizhen | Key Laboratory of Environmental Remediation and Ecosystem Health, Ministry of Education(MOE), College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, China | | | LIN Qiang | Key Laboratory of Environmental Remediation and Ecosystem Health, Ministry of Education(MOE), College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, China | | | LU Limin | Shanghai Pudong New District Agricultural Technology Extension Center, Shanghai 201201, China | | | LU Ping | Shanghai Jiading District Agricultural Technology Extension Service Center, Shanghai 201899, China | | | JIN Haiyang | Shanghai Agricultural Technology Extension Service Center, Shanghai 201103, China | | | HUANG Lulu | Shanghai Agricultural Technology Extension Service Center, Shanghai 201103, China | | | YANG Xiaoe | Key Laboratory of Environmental Remediation and Ecosystem Health, Ministry of Education(MOE), College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, China | xeyang@zju.edu.cn |
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| Abstract: |
| Thirteen leafy vegetable varieties of three species including Spinacia oleracea L., Brassica rapa var. chinensis(L.)Kitam., and Lactuca sativa var. ramose Hort. that were suitable for local cultivation planted in Cd-contaminated fields were selected to study differences in Cd accumulation and the factors influencing Cd accumulation in the edible parts. Additionally, the effects of combined treatments of soil amendments and foliage fertilizer on Cd accumulation in Shanghai Aiqing(Brassica rapa var. chinensis(L.)Kitam.)were investigated. The results showed that among the 13 leafy vegetable cultivars, there were significant differences in the Cd content in the edible parts and roots;the distribution pattern generally was edible part > root. The Cd translocation ability varied clearly among the different leafy vegetable cultivars, and V3(Xinxiaqing-6)exhibited the lowest root to edible part translocation factors. Correlation analysis showed that the Cd content of the edible part was most affected by the Cd concentration in the roots and least affected by the total Cd content of the soil. Leafy vegetables had strong Cd enrichment ability, and the bioaccumulation coefficients of the edible parts of the tested leafy vegetables were greater than 1. Soil amendment or foliage fertilizer treatments showed positive influence on reducing Cd absorption, translocation, and accumulation in Shanghai Aiqin. Considering the Cd concentration in edible parts, yield, translocation factors, and bioaccumulation coefficients, V4(Jinpin Chinese green vegetable-3), V2(Xinxiaqing-3), and V6(Xiafu)are suitable varieties to be planted in this region, and the application of reasonable agronomic/chemical measures is an efficient strategy to reduce heavy metals accumulation in contaminated soil to produce safe products. |
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