不同土壤调理剂对镉污染水稻田控镉效应研究

选用森美思纳米陶瓷材料、楚戈、袁梦牌土壤调理剂、土调1号、改性海泡石五种土壤重金属调理剂,分别在湖南湘潭、湖北大冶、广东韶关、广西河池受重金属镉(Cd)污染水稻田开展大田控镉试验,探讨五种调理剂对不同类型土壤中Cd有效态含量、土壤p H值及稻米Cd含量的影响,结果表明:Cd污染稻田土加入不同土壤调理剂后,土壤p H值提高了0.54~2.06个单位,土壤有效态Cd含量显著降低(P0.05),与对照处理相比,有效态Cd含量下降11.4%~31.8%;施用土壤调理剂,可有效降低稻米Cd含量,与对照相比,森美思纳米陶瓷材料处理中稻米Cd降低了17.1%~44.2%,楚戈处理中降低了14.3%~66.1%,袁梦牌土壤调理剂处理中降低了43.6%~76.8%,土调1号处理中降低了18.2%~80.8%,改性海泡石处理中降低了72.2%~82.7%;施用五种土壤调理剂后水稻产量均未显著减少。

Effects of different soil conditioners on cadmium control in cadmium-contaminated paddy fields

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.