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.
蒋成爱, 吴启堂, 吴顺辉, 龙新宪. 东南景天与不同植物混作对土壤重金属吸收的影响[J]. 中国环境科学, 2009, 29(9): 985-990.
JIANG Cheng-Ai, WU Qi-Tang, WU Shun-Hui, LONG Xin-Xian. Effect of co-cropping Sedum alfredii with different plants on metal uptake. . CHINA ENVIRONMENTAL SCIENCECE, 2009, 29(9): 985-990.