Pedosphere 20(1): 63--70, 2010
ISSN 1002-0160/CN 32-1315/P
©2010 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Poultry manure compost alleviates the phytotoxicity of soil cadmium:Influence on growth of pakchoi(Brassica chinensis L.)
CHEN Han-Song1, HUANG Qiao-Yun1,2, LIU Li-Na1, CAI Peng1, LIANG Wei1 and LI Ming1
1 Key Laboratory of Subtropical Agriculture and Environment of Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070 (China)
2 State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070 (China)
ABSTRACT
      The growth performance of pakchoi (Brassica chinensis L.) in relation to soil cadmium (Cd) fractionations was investigated to evaluate the remediating effect of poultry manure compost on Cd-contaminated soil. A yellow-brown soil (Alfisol) treated with various levels of Cd (0-50 mg Cd kg-1 soil) was amended with increasing amounts of compost from 0 to 120 g kg-1. Compost application transformed 47.8%-69.8% of soluble/exchangeable Cd to the organic-bound fraction, and consequently decreased Cd uptake of pakchoi by 56.2%-62.5% as compared with unamended soil. Alleviation of Cd bioavailability by compost was attributed primarily to the increase of soil pH and complexation of Cd by organic matter including dissolved organic matter. In general, the improvement of pakchoi performance was more pronounced in higher Cd-contaminated soil. Addition of large amount of compost also favored the anti-oxidative capability of pakchoi against Cd toxicity. This low cost remediation method seems to be very effective in the restoration of Cd-contaminated soils.
Key Words:  contamination, heavy metal, plant, remediation
Citation: Chen, H. S., Huang, Q. Y., Liu, L. N., Cai, P., Liang, W. and Li, M. 2010. Poultry manure compost alleviates the phytotoxicity of soil cadmium:Influence on growth of pakchoi(Brassica chinensis L.). Pedosphere. 20(1): 63-70.
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