期刊论文

Diffident Analysis on Accumulation of Cadmium in Rice Plants with Zinc Application

中文

水土保持学报

1009-2242

2018

32

3

340-345,351

10.13870/j.cnki.stbcxb.2018.03.051

国家重点研发计划项目（2016YFD0800705） 湖南省教育厅科学研究项目（17C1645）

本校为第一机构

通过水稻威优46盆栽种植试验,研究了外源Zn施用(0,40,80,160 mg/kg 4个水平)对Cd中度(0.72 mg/kg)和重度(5.26 mg/kg)污染土壤中Cd生物有效性及水稻Cd累积的差异。结果表明:施Zn对各检测指标存在影响,但土壤Cd总量仍是土壤Cd活性和水稻Cd累积差异变动的主控因素。在Cd中度污染土壤中,施Zn降低了土壤交换态Cd含量1.9%~17.0%,但水稻根表铁膜、根和糙米中Cd含量随Zn施用浓度的增大而增大,糙米Cd含量从0.09 mg/kg上升到0.17 mg/kg,相关分析显示糙米Cd含量与土壤交换态Zn含量显著正线性相关。在Cd重度污染土壤中,施Zn增大了土壤交换态Cd含量2.1%~ 4.8%,但降低了水稻各部位中Cd含量,当施Zn浓度超过80 ...

The objectives of this study were to investigate the influences of different concentrations of zinc (Zn)application on cadmium(Cd)bioavailability in soil and Cd accumulation in rice grown in two Cd-pollutedsoils. Rice pot experiment was carried out and the rice variety was Weiyou 46.Application exogenous Cd and Zn,curing generated two Cd-polluted soil(0.72 and 5.26 mg/kg Cd)and four Zn-treated soil(0,40,80 and 160 mg/kg).Results showed that the application of Zn had an influence on the test indexes,while soil Cd concentration was the dominant factor affecting the soil Cd activity and the Cd ac...