Abstract：The field experiment was carried out to verify the feasibility of applying the selected soil amendments in a real case of phytoremediation with the co-crop of Sedum alfredii and Zea mays. Results showed that application of mushroom manure or mica or zeolite significantly decreased Cd and Pb contents in maize straw and grain, and Cd and Pb concentrations in corn grain were below the limit value of the Chinese food standards (GB 2762-2012). The phyto-extraction of Cd by S. alfredii was increased by the treatment of mushroom manure, and humic acids increased significantly the phyto-extraction of Pb. Therefore humic acids and mushroom manure were suitable soil amendments to be applied in the co-cropping system of S. alfredii and maize. The application of mica and zeolite significantly increased the soil pH and decreased the exchangeable Cd and Pb in soil, and accordingly, the uptake of Cd and Pb by the two plants were also reduecd. However, the treatment of mushroom manure or humic acids increased the exchangeable or adsorbed Cd and Pb in soil, the stability constant of Cd absorption by plant roots indiacated that these organic-matter-adsorbed Cd was difficult to be up-taken by maize roots.
孙岩, 吴启堂, 许田芬, 翟晓峰, 林晓燕, 王慧. 土壤改良剂联合间套种技术修复重金属污染土壤:田间试验[J]. 中国环境科学, 2014, 34(8): 2049-2056.
SUN Yan, WU Qi-Tang, XU Tian-Fen, DI Xiao-Feng, LIN Xiao-Yan, WANG Hui. Applying soil amendments to co-cropping system for remediating heavy metal contaminated soil: Field experiment.. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(8): 2049-2056.
