Zhong Shun-Qing, Xu Jian-Ming
Department of Resource Environment and Tourism Management, Hengyang Normal University, Hengyang 421008, Hunan, China.
Ying Yong Sheng Tai Xue Bao. 2013 Jan;24(1):78-82.
A pot experiment was conducted to study the effects of adding 100 and 500 mg x kg(-1) of exogenous iron (Fe) on the lead (Pb) accumulation in Typha latifolia growing on a soil with 0, 100, 500 and 1000 mg x kg(-1) of Pb, respectively. In treatment 500 mg Fe x kg(-1), the Pb concen tration in T. latifolia shoots and roots was higher, compared with that in treatment 100 mg Fe x kg(-1). When the soil Pb concentration was 1000 mg x kg(-1), the Pb concentration in T. lati folia shoots and roots in treatment 500 mg Fe x kg(-1) increased by 33.7% and 50.5%, respectively, compared with that in treatment 100 mg Fe x kg(-1). The exchangeable Pb concentration in rhizosphere soil was 77.0% -114.6% higher in treatment 500 mg Fe x kg(-1) than in treatment 100 mg Fe x kg(-1). When the soil Pb concentration was 0, 100 and 1000 mg x kg(-1), the root dry mass in treatment 500 mg Fe x kg(-1) had a significant decrease, compared with that in treatment 100 mg Fe x kg(-1). It was suggested that adding appropriate amount of Fe to Pb-contaminated wetland soil could increase the availability of soil Pb and improve the Pb accumulation in plants.
进行了一项盆栽试验，以研究分别添加100和500毫克/千克的外源铁（Fe）对生长在铅（Pb）含量分别为0、100、500和1000毫克/千克土壤中的宽叶香蒲铅积累的影响。在500毫克铁/千克处理中，宽叶香蒲地上部和根部的铅浓度高于100毫克铁/千克处理。当土壤铅浓度为1000毫克/千克时，500毫克铁/千克处理中宽叶香蒲地上部和根部的铅浓度分别比100毫克铁/千克处理增加了33.7%和50.5%。500毫克铁/千克处理中根际土壤中可交换铅浓度比100毫克铁/千克处理高77.0% - 114.6%。当土壤铅浓度为0、100和1000毫克/千克时，500毫克铁/千克处理中的根干质量比100毫克铁/千克处理显著降低。结果表明，向铅污染的湿地土壤中添加适量的铁可以提高土壤铅的有效性，并增加植物对铅的积累。
