海藻寡糖对镉、铅单一污染的小油菜及土壤的影响

张朝霞; 许加超; 盛泰; 刘晓琳; 杨海征; 李建林; 郭亮; 高昕; 付晓婷

doi:10.13386/j.issn1002-0306.2014.07.083

海藻寡糖对镉、铅单一污染的小油菜及土壤的影响

Effect of alginate-derived oligosaccharide on the rape (Brassica chinensis L.) and soil contaminated with cadmium or lead

摘要

摘要: 采用盆栽实验方法,研究受Cd、Pb单一污染时,海藻寡糖对小油菜干重及其地上部分和根部的重金属含量,受污土壤中Cd、Pb含量及形态的影响。结果表明,一定量的海藻寡糖可提高Cd污染小油菜的产量,最高可增产15.97%。小油菜地上部和根部Cd含量及根部Pb含量均随海藻寡糖含量的增加而降低,在海藻寡糖含量为1.0%时,分别降低了7.45%、27.52%、12.96%。根际土中Cd含量高于非根际土,而Pb则低于非根际土。水溶态和交换态、残渣态Cd分别呈现降低、增加趋势,而两种形态的Pb含量变化则相反。实验结果为利用海藻寡糖提高农业生产和土壤修复提供了一定的依据。

Abstract: A pot experiment was conducted to explore the effect of alginate-derived oligosaccharide ( ADO) on the rape dry matter, the heavy metals in the abovegrourd parts and root of rape, and the concentrations and forms of Cd and Pb in the soil with the individual pollution. The results showed that the yield of rape was increased by 15.97% at most when compared with the control in the individual pollution of Cd.Cd in the abovegrourd parts and root and Pb in the root were decreased with the increasing of ADO, and they were decreased by 7.45%, 27.52%, 12.96%, respectively at 1.0% of ADO. Cd in the rhizosphere soil was more than that in the non-rhizosphere soil, which was counter to Pb in soil.Moreover, the soluble and exchangeble Cd reduced while Cd in the residual state raised, which was opposite to the change of Pb in those states. The study provided the foundation for the application of ADO in the agriculture and contaminated soil remendation.