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| Preliminary Investigation of Intercropping of Wheat with Cd Hyperaccumulator Sedum plumbizincicola on Calcareous, Lead Smelting Contaminated Soil |
| Received:April 30, 2015 |
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| KeyWord:intercropping;winter wheat;Sedum plumbizincicola;soil;lead smelting |
| Author Name | Affiliation | E-mail | | LU Yi-fu | Institute of Environmental Science of Jiyuan City, Jiyuan 459000, China | | | LI Zhen-li | Institute of Environmental Science of Jiyuan City, Jiyuan 459000, China | | | RUAN Xin-ling | College of Environment and Planning, Henan University, Kaifeng 475004, China | | | LI Hui-yong | Cereal Crop Research Institute, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China | | | ZHANG Hong-yi | School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China | | | TIAN Hui-yang | School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China | | | LI Li-ping | School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China | li_liping@yahoo.com |
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| Abstract: |
| The effect of intercropping wheat(Triticum aestivum) with Cd hyperaccumulator Sedum plumbizincicola was investigated in a field experiment on calcareous, lead smelting contaminated soils in Henan Province. Wheat varieties Bainong Aikang 58 and Zhengmai 7698 were either monocultured or intercropped with Sedum plumbizincicola in alternating rows. Intercropping resulted in non-significant lower or similar extractability of soil As, Cd and Pb compared to the monocultured soil. No significant difference was found in grain concentrations of As, Cd and Pb between intercropped and monocultured wheat(P>0.05), grain Cd concentrations of all treatments exceeded the maximum permissible concentration set by national standard GB 2762—2012. Wheat variety had no influence on the Cd concentration of the hyperaccumulator, and mean shoot concentration of Cd was 23.4 mg·kg-1. Shoot accumulation of Cd of Sedum plumbizincicola was 2.12 g·hm-2. Availability of nitrogen(N) and phosphorus(P) in intercropped soil were 2.87%~42.0% higher than the monocultured soil, while the grain yields of the intercropped wheat were 0.578%~5.57% lower than the monocultured wheat. The results suggest that intercropping with alternating rows of wheat and Cd hyperaccumulator is not effective in reducing As, Cd and Pb concentrations in wheat grain, and the phytoextraction of Cd from the soil by the Sedum plumbizincicola is negligible. |
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