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| Effects of different soil conditioners on cadmium control in cadmium-contaminated paddy fields |
| Received:May 20, 2018 |
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| KeyWord:soil conditioner;cadmium pollution;rice field;cadmium control effect |
| Author Name | Affiliation | E-mail | | LI Xin | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | LIN Da-song | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | lindasong608@126.com | | LIU Yan | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | JIAO Wei-xiong | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | ZHANG Li | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | |
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| Abstract: |
| This paper selected five soil heavy metal conditioners SAMMNS Nano-ceramic materials, Chuge, Yuanmeng soil conditioner, Soil conditioning No.1, Modified sepiolite. The effects of five conditioners on Cd availability, soil pH and Cd content in different types of soils were investigated by Field-controlled cadmium tests conducted in cadmium-contaminated paddy fields in Xiangtan,Hubei Daye, Guangdong Shaoguan and Guangxi Hechi. The results showed that:After adding different soil conditioners to Cd-contaminated paddy soils, the soil pH values increased by 0.54 to 2.06 units and the soil available Cd content decreased significantly(P<0.05). Compared with the control, the available states were effective. The content of Cd decreased by 11.4%~31.8%. The application of soil conditioner can effectively reduce the Cd content of rice. Compared with the control, the rice Cd of the SAMMNS Nano-ceramic materials treatment decreased by 17.1% to 44.2%, the rice Cd of the Chuge treatment decreased by 14.3% to 66.1% and the rice Cd of the Yuanmeng soil conditioner treatment decreased by 43.6%~76.8%, the rice Cd decreased by 18.2%~80.8% in the Soil conditioning No. 1 treatment and the rice Cd decreased by 72.2%~82.7% in the Modified sepiolite treatment. The effect of applying soil conditioners on rice yield found that the application of the five soil conditioners did not produce a significant reduction in rice yield. |
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