期刊论文

Effects of silicon application on cadmium uptake and translocation of rice under cadmium stress

Bai-Qing, T.

中文

生态学杂志

1000-4890

2019

38

4

1049-1056

10.13292/j.1000-4890.201904.005

中南镉砷污染农田综合防治示范与技术构建(国家重点研发计划课题2017YFD0801505) 灌溉水镉含量对稻米镉污染的贡献率分析及其净化技术(湖南省科技计划项目重点研发计划项目2016NK2017) 灌溉水源水质净化技术试点研究(农业部财政部项目20160610)资助.

本校为第一且通讯机构

探讨镉(Cd)胁迫下,施硅处理对水稻镉积累的影响.以水稻“泰优390”为材料,通过营养液培养的方法,研究水稻在3种镉胁迫浓度(Cd1、Cd2、Cd3)下施用4种不同浓度硅(Si0、Si1、Si2、Si3)对水稻镉积累的影响.结果 表明:施用硅浓度越高,水稻产量增加越大,对水稻各部位镉含量具有显著降低效果;施硅能显著降低水稻各部位转运系数,阻控镉向地上部转移,且对水稻伤流液中镉含量也能起到显著降低的作用;表明施硅能有效阻控水稻吸收镉,且施硅浓度越高效果越显著,但考虑成本因素,不同程度镉污染应该施用相应量的硅,以达到国家食品中污染物限量标准;施硅与镉胁迫对水稻农艺性状以及镉吸收和转运存在交互作用.本试...

Effects of four concentrations of silicon (SiO, Sil, Si2, Si3) on cadmium (Cd) accumulation in rice “Taiyou 390" under three Cd concentrations (Cdl, Cd2, Cd3) were investigated. The results showed that rice yield increased with the increases of Si concentration. The Cd concentration in various parts of rice significantly decreased. Si application significantly reduced the transport coefficient in different parts of the rice, prevented the transfer of Cd to the aboveground part, and reduced Cd concentration in rice wound fluid. Si application e...