| Effect of Cd and Pb immobilization by natural soil amendments on growth and heavy metal uptake of ramie (Boehmeria nivea) |
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| DOI：10.7606/j.issn.1000-7601.2016.04.40 |
| Key Words: contaminated soil immobilization ramie (Boehmeria nivea) growth lead cadmium |
| Author Name | Affiliation | | LIU Jin | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | YIN Xian-qiang | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | SUN Hui-min | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | LU Jia-long | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | WEI Ge-hong | College of Life Science, Northwest A&F University, Yangling, Shaanxi 712100, China | | HE Lei | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Pot experiments under greenhouse condition were carried out to evaluate the growth and heavy metal uptake of ramie in heavy metal contaminated yellow-cinnamon soils amended with diatomite, bentonite, limestone, zeolite at different application rates. In our study, the biomass, leaf malondialdehyde (MDA) content, the concentrations of Cd and Pb in different parts of ramie, and fractionations of Cd and Pb in soils were determined. The results showed that zeolite, diatomite (12 g·kg-1) and bentonite (9～12 g·kg-1) amendment significantly reduced acid-extractable Cd concentration in soil. Furthermore, diatomite, bentonite and zeolite at all rates reduced acid-extractable Pb concentrations by up to 43.1%. Application of amendments decreased total Cd and Pb concentrations in different parts of ramie plants. Cd and Pb concentrations in whole plants grown in amended soils were reduced by 9.9%～62.7% and 5.8%～28.4%, respectively. Least Cd and Pb uptake was attained at application rate of 9 g·kg-1. Except for limestone, other amendments alleviated the inhibitory effects of heavy metals on plant growth. |
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