安徽农业科学2017，Vol.45Issue(35)：23-25,3.
水稻对硅元素吸收特性研究
Absorption Property of Silicon Uptake in Rice Crops
摘要
Abstract
[Objective]Absorption property of Si uptake in rice crops was studied. [Method]The rice (Oryza sativus L. ) was employed to study absorption property of Si uptake under 0. 085,0. 850 mmol/L Si level by hydroponic experiments. [Result]The total Si uptake was more than Si uptake calculated via transpiration streams under two Si treatments for 12 hours. The two gradually increased with the extension of time. The con-tribution of Si uptake calculated via transpiration streams to total Si uptake was greater at higher Si supply level than at lower Si supply level. Si uptake by rice during 6 hours was inhibited by the treatment with metabolic inhibitors or low temperature at 0. 085,0. 850 mmol/L Si. The degree of inhibition was decreased with increasing external Si concentration. At 0. 085,0. 850 mmol/L Si level,during 12 hours the Si concentrations of the xylem exudates in rice increased with time,but Si concentration in the external solutions decreased with time. And Si concentration was sever-al-fold higher in xylem exudates than in the external solutions. [ Conclusion] There are two processes of active absorption and passive absorption of Si by rice,especially in high Si concentration,passive absorption can not be ignored.关键词
水稻/硅/吸收Key words
Rice/Si/Uptake分类
农业科技引用本文复制引用
华海霞..水稻对硅元素吸收特性研究[J].安徽农业科学,2017,45(35):23-25,3.基金项目
江苏省高等职业教育产教融合实训平台环境分析测试中心资助项目(苏教高〔2016〕19号) （苏教高〔2016〕19号）
南通市固体废弃物资源化利用重点实验室资助项目(CP12015006). （CP12015006）
