Microbially-mediated rhizosphere process decreases arsenic uptake by rice plants with different water regimes
Pot experiments were conducted to investigate the effect of microorganisms and soil water regimes on As uptake of rice seedlings (Oryza sativa L.) by Fe plaque formation. Although there was much more As in the rice roots incubated in As-contaminated soil (SY soil), there was no significant difference of shoot As concentration between SY soil and uncontaminated soil (JX soil), and there was no As adsorbed on the Fe plaque with sterilized JX soil. The amount of Fe plaque under submerged conditions was much higher than with lower soil moisture contents. There was a positive correlation between the amount of Fe plaque and P accumulated in the plaque (r=0.97, 0.95 and 0.92, n=12, respectively). These results are important in understanding the biogeochemistry of Fe, P and As in soil-rice systems in relation to microorganisms and water management.
sterile Fe plaque arsenic phosphorus paddy soil
X. P. Chen Y. G. Zhu X. J. Wang
Department of Soil Environmental Sciences, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Beiiine. 100085, P. R. China. VQTzhu(2) rcees. Ac. Rn
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
522-523
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）