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| Effects of Lime and Organic Amendments on Cd Availability in Cd-Contaminated Soils with Different Properties |
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| KeyWord:lime; organic amendment; soil type; Cd contamination; available Cd |
| Author Name | Affiliation | | DAI Yun-chao | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | Lu Jia-long | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | CAO Ying-fei | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | LIU Ke | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | ZHANG Rui-long | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China |
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| Abstract: |
| A incubation experiment was carried out to examine the effects of different amendments（chicken manure, peat and lime） on Cd availability in four different types of Cd contaminated soils（Yunnan lateritic red soil, Jiangxi red soil, Jilin black soil and Neimeng chestnut soil）. All treatments significantly reduced available Cd contents in all soils. After 60 days of incubation, immobilization rate of available Cd by chicken manure were 37.0%, 52.7%, 29.3% and 49.6% for Yunnan lateritic red soil, Jiangxi red soil, Jilin black soil and Neimeng chestnut soils, respectively. Peat amendment reduced Cd availability by 33.1%, 51.7%, 30.5% and 51.2% in Yunnan lateritic red soil, Jiangxi red soil, Jilin black soil and Neimeng chestnut soils respectively. Lime had greater rates of Cd immobilization, which were 60.7%, 55.5%, 40.7% and 41.7% for Yunnan lateritic red soil, Jiangxi red soil, Jilin black soil and Neimeng chestnut soils, respectively. In conclusion, lime is a better immobilizer of Cd in acidic Cd-contaminated soils, but organic amendments perform better than lime in both neutral and alkaline soils. |
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