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| Effects of Red-mud and Lime on Cadmium Uptake of Corn in Dryland Converted from Cadmium Polluted Paddy Field |
| Received:April 02, 2014 |
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| KeyWord:cadmium;corn;lime;red-mud;cropping system change |
| Author Name | Affiliation | E-mail | | XIE Yun-he | Soil and Fertilizer Institute of Hunan Province, Changsha 410125, China
Longping Branch of Graduate School, Central South University, Changsha 410125, China
Ministry of Agriculture Key Lab of Agri-Environment in the Midstream of Yangtze River Plain, Changsha 410125, China | | | JI Xiong-hui | Soil and Fertilizer Institute of Hunan Province, Changsha 410125, China
Longping Branch of Graduate School, Central South University, Changsha 410125, China
Ministry of Agriculture Key Lab of Agri-Environment in the Midstream of Yangtze River Plain, Changsha 410125, China | jixionghui@sohu.com | | HUANG Juan | Longping Branch of Graduate School, Central South University, Changsha 410125, China
Ministry of Agriculture Key Lab of Agri-Environment in the Midstream of Yangtze River Plain, Changsha 410125, China | | | PENG Hua | Soil and Fertilizer Institute of Hunan Province, Changsha 410125, China
Longping Branch of Graduate School, Central South University, Changsha 410125, China
Ministry of Agriculture Key Lab of Agri-Environment in the Midstream of Yangtze River Plain, Changsha 410125, China | | | TIAN Fa-xiang | Soil and Fertilizer Institute of Hunan Province, Changsha 410125, China
Ministry of Agriculture Key Lab of Agri-Environment in the Midstream of Yangtze River Plain, Changsha 410125, China | | | LIU Zhao-bing | Soil and Fertilizer Institute of Hunan Province, Changsha 410125, China
Ministry of Agriculture Key Lab of Agri-Environment in the Midstream of Yangtze River Plain, Changsha 410125, China | |
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| Abstract: |
| Chemical fixation is one of remediation techniques for heavy metal polluted soils that reduces heavy metal availability in soil through increasing soil pH and enhancing soil adsorption. In this study, a field experiment was conducted to study Cd absorption and accumulation in corn grown in dryland soil converted from Cd polluted paddy soil with applications of red mud and lime. Applying red-mud and lime had no significantly effects on yields of spring and autumn corn compared to the control. However, the yields and stalk dry weights of corn were significantly higher in red-mud than in lime treatments. Soil pH values increased but soil available Cd and corn Cd absorption decreased after application of red-mud and lime, and Cd content in spring and autumn corn decreased by 27.5% and 21.1% by red-mud, and decreased by 26.4% and 31.1% by lime respectively. Red-mud reduced Cd in corn stem, leaf and grain greater than lime did, but lime showed stronger ability to inhibit Cd transportation from stem to leaf and to grain than red-mud did. The present results show that an effective and safety option to utilize Cd-polluted paddy soil would be to grow corn in combination with red-mud and lime additions. |
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