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| Effects of Soil Amendments on Cd Bioavailability to and Uptake by Brassia chinensis in Different Cd-contaminated Soils |
| Received:August 08, 2014 |
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| KeyWord:amendment;soils;Brassia chinensis;Cd;pH |
| Author Name | Affiliation | E-mail | | DAI Yun-chao | College of Resources and Environment, Northwest A&F University
Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | LÜ Jia-long | College of Resources and Environment, Northwest A&F University
Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | ljlll@nwsuaf.edu.cn | | DIAO Zhan | College of Resources and Environment, Northwest A&F University
Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | LIU Jin | College of Resources and Environment, Northwest A&F University
Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | AN Wei-qiang | College of Resources and Environment, Northwest A&F University
Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | CHEN Xi | College of Resources and Environment, Northwest A&F University
Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | |
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| Abstract: |
| Reducing bioavailability of heavy metals in soils is crucial to prevent heavy metal from entering the food chain. A pot experiment was conducted to evaluate the effects of five amendments, lime(L), chicken manure(F), peat(T), lime+chicken manure(LF), lime peat(LT), on biomass and Cd uptake of Brassia chinensis, soil pH and available Cd in 4 different Cd contaminated soils including Yunnan lateritic red soil, Jiangxi red soil, Jilin black soil and Neimeng chestnut soil. The results indicated that all treatments except L significantly promoted the biomass of B. chinensis by 11.76%～59.38%, compared with the control treatment. Lime could significantly promote the B. chinensis's growth only in acidic soil. The growth promotion of amendments was in order of F > T > L. Soil available Cd and Cd uptake by Brassia chinensis were significantly decreased by applying amendments. Soil available Cd was decreased by 31.2%～67.0%. These inhibitory effects were greater in mixed amendments(LF and LT) than in single amendment(F, T, L). Among three amendments, lime was the best for acidic soils, while chicken manure and peat were superior for alkaline soils. Treatments of LF, LT, F and L significantly increased soil pH by 0.15～2.16 units, while applying T significantly decreased the pH of alkaline soil. |
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