%0 Journal Article
%T Effect of Application of Silicon on Arsenic Uptake by Rice Seedlings in Soil<br>土壤施硅对水稻吸收砷的影响
%A GUO Wei
%A ZHU Yong-guan
%A LIANG Yong-chao
%A LIU Wen-ju
%A CHEN Zheng
%A <br>郭伟
%A 朱永官
%A 梁永超
%A 刘文菊
%A 陈正
%J 环境科学
%D 2006
%I 
%X The objective of study was to investigate effect of silicon on arsenic uptake by rice seedlings in two soils with different arsenic concentrations. The results show that the addition of silicon has little effect on shoot and root dry weights of rice seedlings. The addition of silicon did not affect shoot and root P concentrations of rice seedlings grown in low arsenic soil, but significantly increased shoot P concentrations on rice grown in high arsenic soil. Irrespective of the initial pH of K2SiO3 solution, the addition of silicon significantly decreased shoot and root As concentrations of rice seedlings compared with the control. For seedlings grown in low As- contaminated soil, As concentrations in shoot and root were reduced by 36 % -59 % and 15 % -37 % with the application of silicon, respectively. For seedlings grown in high As-contaminated soil, As concentrations in shoot and root were reduced by 42 % - 58 % and 70 % - 82% with the application of silicon, respectively. These results are in agreement with our previous reports based on a solution culture experiment. Possible mechanisms of the effect of Si on As uptake was also discussed.
%K silicon
%K As-contaminated soil
%K rice
%K decrease uptake<br>硅
%K 砷污染土壤
%K 水稻
%K 抑制吸收
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=B42631AE49FD3F68&yid=37904DC365DD7266&vid=DB817633AA4F79B9&iid=DF92D298D3FF1E6E&sid=532CB3FA5DC08D32&eid=4108C40BBEB9A8DE&journal_id=0250-3301&journal_name=环境科学&referenced_num=7&reference_num=28