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| Effect of co-cropping Sedum alfredii with different plants on metal uptake. |
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Abstract Plants with different root system such as maize, ryegrass and soybean were respectively co-cropped with Sedum alfredii, a Cd and Zn hyperaccumulator, in a pot experiment with heavy metal contaminated soil, aiming to investigate the effect of different combined system on metal uptake by the two co-cropped plants. Under the conditions of the pot experiment, co-crop with maize and soybean increased Zn uptake by S. alfredii from 15345mg/kg for mono-crop to 18673, 17266mg/kg, respectively for the two co-crops. Co-crop with ryegrass had no significant effect on Cd, Pb and Zn uptake by S. alfredii. Co-crop with S. alfredii significantly decreased Cd and Zn uptake by maize and ryegrass. Considering with biomass production, Cd/Pb/Zn total uptake (per half pot) by the hyperaccumulator co-cropped with maize and soybean was 1.68~1.87 times of that mono-crop. The metal uptake by the hyperaccu- mulator can be improved by co-cropping.
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Received: 06 January 2009
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CHEN Huan-Yu, LIU Jing-Qing, WEI Zong-Yuan, ZHANG Hui-Hui, HE Xiao-Fang, ZHOU Xiao-Yan, QIU Shang-De, HU Bao-Lan, LOU Li-Ping. Radial differences in contaminant distribution in large-diameter pipe scales of main pipelines in drinking water distribution system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(9): 2706-2712. |
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