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| Effects of passivators on the growth and cadmium accumulation of intercropped maize and Sedum plumbizincicola |
| Received:November 19, 2018 |
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| KeyWord:cadmium;passivator;maize;Sedum plumbizincicola;intercropping system |
| Author Name | Affiliation | E-mail | | CHEN Guo-hao | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | ZU Yan-qun | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | 649332092@qq.com | | ZHAN Fang-dong | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | LI Bo | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | LI Yuan | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | |
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| Abstract: |
| Pot experiments were conducted to study the effects of the application of six compounded passivating agents[LS (lime+sepiolite), LP (lime+ calcium magnesium phosphate fertilizer), LH (lime+humic acid), SP (sepiolite+ calcium magnesium phosphate fertilizer), SH (sepiolite+humic acid), PH (calcium magnesium phosophate fertilizer+humic acid)] on the growth and Cd accumulation of intercropped maize and Sedum plumbizincicolain Cd-contaminated soil. The biomass of intercropped maize was significantly higher (by 12.2%~52.4%), the Cd content of intercropped maize was significantly lower (by 10.0%~38.9%), and the Cd transport coefficient of intercropped maize was significantly lower than that with monocultured maize. The biomass of intercropped S. plumbizincicola was significantly higher (by 20.3%~73.4%)than that of monocultured S. plumbizincicola. Under the two planting systems, the biomass of maize treated with LS was the highest and the Cd content of maize shoots was the lowest; these met the criteria of national food hygiene standards. In the intercropping system with LS and LH treatments, the biomass and Cd accumulation of S. plumbizincicola were the highest. The model of LS treatment + intercropping of maize and S. plumbizincicola in heavily Cd-polluted soil could be used for agricultural production and soil remediation. |
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