根表铁锰氧化物胶膜对不同品种水稻吸镉的影响

摘要

The difference of Cd uptake by rice varieties and its relationship with Fe, Mn oxides deposited on root surface were studied by the methods of soil culture. rnThe results showed that different rice varieties had significant difference on Cd concentrations in their root coating, root and shoot, and the transportation of Cd in plants was different between rice varieties. The amounts of Fe, Mn oxides deposited on root surface of rice varieties was also significantly different. The Cd concentration in root coating and shoot of rice varieties showed a significant correlation with Mn concentration in root coating, but not related with the Fe concentration in root coating.%采用土培方法，研究了不同品种水稻吸镉的差异及其与根表铁锰氧化物胶膜的关系。结果表明：不同品种水稻其根膜、根部及地上部含镉量均存在显著性差异，且镉在不同水稻植株体内运输转移能力不同。不同水稻其根表淀积的铁锰氧化物数量也存在显著性差异，根膜及地上部的含镉量与根膜的含铁量均未达到显著性相关，但与根膜的含锰量相关性显著。