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施硅对高浓度Cd污染土壤中水稻植株Cd积累与分配的调控

张世浩 蔡昆争 王维 黄飞 蔡一霞

张世浩, 蔡昆争, 王维, 黄飞, 蔡一霞. 施硅对高浓度Cd污染土壤中水稻植株Cd积累与分配的调控[J]. 环境科学研究, 2016, 29(7): 1032-1040.
引用本文: 张世浩, 蔡昆争, 王维, 黄飞, 蔡一霞. 施硅对高浓度Cd污染土壤中水稻植株Cd积累与分配的调控[J]. 环境科学研究, 2016, 29(7): 1032-1040.
ZHANG Shihao, CAI Kunzheng, WANG Wei, HUANG Fei, CAI Yixia. Regulation of Silicon Application on Cadmiun Accumulation and Translocation in Rice (Oryza sativa. L) Grown Under High Concentration Cadmium-Polluted Soil[J]. Research of Environmental Sciences, 2016, 29(7): 1032-1040.
Citation: ZHANG Shihao, CAI Kunzheng, WANG Wei, HUANG Fei, CAI Yixia. Regulation of Silicon Application on Cadmiun Accumulation and Translocation in Rice (Oryza sativa. L) Grown Under High Concentration Cadmium-Polluted Soil[J]. Research of Environmental Sciences, 2016, 29(7): 1032-1040.

施硅对高浓度Cd污染土壤中水稻植株Cd积累与分配的调控

基金项目: 农业部农业环境重点实验室开放基金项目;广东省省级科技计划项目(2013B020310010)

Regulation of Silicon Application on Cadmiun Accumulation and Translocation in Rice (Oryza sativa. L) Grown Under High Concentration Cadmium-Polluted Soil

  • 摘要: 为了评估施硅处理对Cd在水稻(Oryza sativa. L)体内迁移的影响,通过外源添加Cd(CdCl2)制成w(Cd)为50、100 mg/kg的污染土壤,采用盆栽试验研究不同施硅量〔w(Si)分别为0、28、56 mg/kg〕对Cd污染土壤中水稻(以华航丝苗和黄华占为例)植株中Cd积累与分配的影响. 结果表明:施硅处理可明显影响水稻根部w(Cd),表现为增加华航丝苗根部w(Cd)、降低黄花占根部w(Cd),但两个品种根部Cd累积量均呈增加趋势. 施硅处理后华航丝苗和黄华占的叶、谷壳、糊粉层及精米中w(Cd)、Cd累积量均呈降低趋势,并且在施硅量为56 mg/kg时显著降低;施硅处理显著降低了华航丝苗和黄华占茎中w(Cd)以及华航丝苗茎中Cd累积量,同时增加了黄花占茎中Cd累积量. 施硅可显著降低精米中w(Cd),在w(Cd)为50和100 mg/kg的Cd污染水平下,华航丝苗和黄华占精米中w(Cd)较未施硅处理下的最大降幅分别达到32.49%、53.77%和24.73%、20.67%. 施硅对水稻植株各器官的Cd富集系数、转移系数和分配系数都有一定影响,施硅处理下水稻植株地上部各器官的Cd富集系数和转移系数均呈降低趋势,根部Cd分配比例显著增加. 研究显示,施硅对高浓度Cd污染土壤中水稻植株Cd积累与分配有一定调节作用,并因土壤中w(Cd)、施硅量、水稻品种及稻株器官的不同而存在差异.

     

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  • 收稿日期:  2015-12-17
  • 修回日期:  2016-03-17
  • 刊出日期:  2016-07-25

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