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| Effects of Different Amendments on Soil Cd Forms and Cd Uptake by Chinese Cabbage in Cd-contaminated Calcareous Soils |
| Received:February 26, 2015 |
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| KeyWord:Chinese cabbage;Cd uptake;soil amendment;Cd form |
| Author Name | Affiliation | E-mail | | LI Dan | The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group/College of Agronomy of Shihezi University, Shihezi 832000, China | | | LI Jun-hua | The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group/College of Agronomy of Shihezi University, Shihezi 832000, China | ljh630703@163.com | | HE Ting | The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group/College of Agronomy of Shihezi University, Shihezi 832000, China | | | MENG Pei-pei | The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group/College of Agronomy of Shihezi University, Shihezi 832000, China | |
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| Abstract: |
| Soil amendments influence the forms and plant bioavailability of Cd in soil. In this pot experiment, Chinese cabbage was grown in different materials amended soils containing 0.3, 1.5, and 3 mg Cd·kg-1. The amendments were biochar, chicken manure, humic acid, and sepiolite. The growth, biomass and Cd content of plant and the soil Cd forms were measured. Results showed that cabbage biomass increased by 42.7%~79.8% by the highest amount of chicken manure as compared to the control. At 1.5 and 3.0 mg Cd·kg-1, all amendments increased the Cd content of cabbage, with exception of sepiolite at 1.5 mg Cd·kg-1. Amendments significantly affected Cd forms. Soil Cd was mainly exchangeable and Fe-Mn oxide-bound forms at 0.3 mg Cd·kg-1 soil. However, the major forms of Cd were exchangeable and carbonate-bound Cd in both chicken manure and humic acid treatments. The sepiolite treatment increased the proportion of residual Cd and organic matter-bound Cd. Correlation analysis showed that the Cd content of Chinese cabbage was significantly and positively correlated with exchangeable, carbonate-bound, Fe-Mn oxide-bound and organic matter-bound Cd in soil. The Cd content in Chinese cabbage was also highly correlated with soil total Cd. |
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